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Record Information
Version2.0
Creation Date2009-07-21 20:26:11 UTC
Update Date2014-12-24 20:25:49 UTC
Accession NumberT3D2699
Identification
Common NameVitamin A
ClassSmall Molecule
DescriptionVitamin A (retinol) is a yellow fat-soluble, antioxidant vitamin important in vision and bone growth. It belongs to the family of chemical compounds known as retinoids. Retinol is ingested in a precursor form; animal sources (milk and eggs) contain retinyl esters, whereas plants (carrots, spinach) contain pro-vitamin A carotenoids. Hydrolysis of retinyl esters results in retinol while pro-vitamin A carotenoids can be cleaved to produce retinal. Retinal, also known as retinaldehyde, can be reversibly reduced to produce retinol or it can be irreversibly oxidized to produce retinoic acid. Retinol and derivatives of retinol that play an essential role in metabolic functioning of the retina, the growth of and differentiation of epithelial tissue, the growth of bone, reproduction, and the immune response. Dietary vitamin A is derived from a variety of carotenoids found in plants. It is enriched in the liver, egg yolks, and the fat component of dairy products.
Compound Type
  • Anti-Acne Preparation
  • Drug
  • Essential Vitamin
  • Food Toxin
  • Household Toxin
  • Metabolite
  • Natural Compound
  • Nutraceutical
  • Organic Compound
  • Selective Serotonin Reuptake Inhibitor
  • Vitamin
  • Vitamin A
Chemical Structure
Thumb
Synonyms
Synonym
(2e,4e,6e,8e)-3,7-Dimethyl-9-(2,6,6-trimethylcyclohex-1-en-1-yl)nona-2,4,6,8-tetraen-1-ol
(all-E)-3,7-Dimethyl-9-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2,4,6,8-nonatetraen-1-ol
All-trans-Retinol
all-trans-retinyl alcohol
all-trans-vitamin A alcohol
Alphalin
b-Retinol
beta-Retinol
Chocola a
Retinol
trans-Retinol
Vitamin a
Vitamin A1
Chemical FormulaC20H30O
Average Molecular Mass286.452 g/mol
Monoisotopic Mass286.230 g/mol
CAS Registry Number68-26-8
IUPAC Name(2Z,4E,6E,8E)-3,7-dimethyl-9-(2,6,6-trimethylcyclohex-1-en-1-yl)nona-2,4,6,8-tetraen-1-ol
Traditional Name13-cis retinol
SMILES[H]\C(CO)=C(\C)/C(/[H])=C(\[H])/C(/[H])=C(\C)/C(/[H])=C(\[H])C1=C(C)CCCC1(C)C
InChI IdentifierInChI=1S/C20H30O/c1-16(8-6-9-17(2)13-15-21)11-12-19-18(3)10-7-14-20(19,4)5/h6,8-9,11-13,21H,7,10,14-15H2,1-5H3/b9-6+,12-11+,16-8+,17-13+
InChI KeyInChIKey=FPIPGXGPPPQFEQ-OVSJKPMPSA-N
Chemical Taxonomy
Description belongs to the class of organic compounds known as retinoids. These are oxygenated derivatives of 3,7-dimethyl-1-(2,6,6-trimethylcyclohex-1-enyl)nona-1,3,5,7-tetraene and derivatives thereof.
KingdomOrganic compounds
Super ClassLipids and lipid-like molecules
ClassPrenol lipids
Sub ClassRetinoids
Direct ParentRetinoids
Alternative Parents
Substituents
  • Retinoid skeleton
  • Diterpenoid
  • Fatty alcohol
  • Fatty acyl
  • Organic oxygen compound
  • Hydrocarbon derivative
  • Primary alcohol
  • Organooxygen compound
  • Alcohol
  • Aliphatic homomonocyclic compound
Molecular FrameworkAliphatic homomonocyclic compounds
External Descriptors
Biological Properties
StatusDetected and Not Quantified
OriginEndogenous
Cellular Locations
  • Cytoplasm
  • Extracellular
  • Membrane
Biofluid LocationsNot Available
Tissue Locations
  • Adipose Tissue
  • Fibroblasts
  • Intestine
  • Kidney
  • Liver
  • Myelin
  • Placenta
  • Skin
  • Spleen
  • Stratum Corneum
  • Testes
Pathways
NameSMPDB LinkKEGG Link
Retinol MetabolismSMP00074 map00830
ApplicationsNot Available
Biological Roles
Chemical RolesNot Available
Physical Properties
StateSolid
AppearanceWhite powder.
Experimental Properties
PropertyValue
Melting Point63.5°C
Boiling PointNot Available
Solubility0.671 mg/L
LogP5.68
Predicted Properties
PropertyValueSource
Water Solubility0.0076 g/LALOGPS
logP6.38ALOGPS
logP4.69ChemAxon
logS-4.6ALOGPS
pKa (Strongest Acidic)16.44ChemAxon
pKa (Strongest Basic)-2.2ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count1ChemAxon
Hydrogen Donor Count1ChemAxon
Polar Surface Area20.23 ŲChemAxon
Rotatable Bond Count5ChemAxon
Refractivity97.92 m³·mol⁻¹ChemAxon
Polarizability36.28 ųChemAxon
Number of Rings1ChemAxon
Bioavailability1ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Spectra
Spectra
Spectrum TypeDescriptionSplash KeyView
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, Positivesplash10-00di-1190000000-346a3e44c44d46353e80JSpectraViewer
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (1 TMS) - 70eV, Positivesplash10-0006-7139000000-7242603c3f7f12c824cdJSpectraViewer
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 10V, Positive (Annotated)splash10-000i-0290000000-25c523b646154b291da8JSpectraViewer | MoNA
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 25V, Positive (Annotated)splash10-05gj-3900000000-a63c286f931608f650a3JSpectraViewer | MoNA
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 40V, Positive (Annotated)splash10-05mo-9700000000-e627db30469c74bb037fJSpectraViewer | MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-00kr-1490000000-7205fba02aeb80622df8JSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-00m0-3920000000-951836eaf171751b137cJSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-0lei-9810000000-b9b76a3e956e61a7d39eJSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-000i-0090000000-575d71f5f53354f828c2JSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-0a4r-0090000000-c71c47589510cf7c1a0bJSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-00ku-3690000000-26f7587a1f34c10cd8f7JSpectraViewer
MSMass Spectrum (Electron Ionization)splash10-052r-2950000000-c24ec8ff8d0ba6c1f23fJSpectraViewer | MoNA
2D NMR[1H,13C] 2D NMR SpectrumNot AvailableJSpectraViewer
Toxicity Profile
Route of ExposureOral, readily absorbed from the normal gastrointestinal tract
Mechanism of ToxicityVision:Vitamin A (all-trans retinol) is converted in the retina to the 11-cis-isomer of retinaldehyde or 11-cis-retinal. 11-cis-retinal functions in the retina in the transduction of light into the neural signals necessary for vision. 11-cis-retinal, while attached to opsin in rhodopsin is isomerized to all-trans-retinal by light. This is the event that triggers the nerve impulse to the brain which allows for the perception of light. All-trans-retinal is then released from opsin and reduced to all-trans-retinol. All-trans-retinol is isomerized to 11-cis-retinol in the dark, and then oxidized to 11-cis-retinal. 11-cis-retinal recombines with opsin to re-form rhodopsin. Night blindness or defective vision at low illumination results from a failure to re-synthesize 11-cis retinal rapidly.
Epithelial differentiation: The role of Vitamin A in epithelial differentiation, as well as in other physiological processes, involves the binding of Vitamin A to two families of nuclear retinoid receptors (retinoic acid receptors, RARs; and retinoid-X receptors, RXRs). These receptors function as ligand-activated transcription factors that modulate gene transcription. When there is not enough Vitamin A to bind these receptors, natural cell differentiation and growth are interrupted.
MetabolismHepatic. Retinol is conjugated with glucuronic acid; the B-glucuronide undergoes enterohepatic circulation and oxidation to retinol and retinoic acid. Retinoic acid undergoes decarboxylation and conjugation with glucuronic acid. Half Life: 1.9 hours
Toxicity ValuesNot Available
Lethal DoseNot Available
Carcinogenicity (IARC Classification)No indication of carcinogenicity to humans (not listed by IARC).
Uses/SourcesFor the treatment of vitamin A deficiency. Vitamin A helps regulate the immune system, which helps prevent or fight off infections by making white blood cells that destroy harmful bacteria and viruses.
Minimum Risk LevelNot Available
Health EffectsNot Available
SymptomsAcute toxicity (single ingestion of 7 500 RE or 25 000 IU per kg or more): Signs and symptoms may be delayed for 8 to 24 hours and include: increased intracranial pressure, headache, irritability, drowsiness, dizziness, lethargy, vomiting, diarrhea, bulging of fontanels in infants, diplopia, papilledema. Peeling of skin around mouth may be observed from 1 to several days after ingestion and may spread to the rest of the body.
TreatmentThe treatment of hypervitaminosis A consists of immediate withdrawal of the vitamin along with symptomatic and supportive treatment. (18)
Normal Concentrations
Not Available
Abnormal Concentrations
Not Available
DrugBank IDDB00162
HMDB IDHMDB00305
PubChem Compound ID445354
ChEMBL IDCHEMBL986
ChemSpider ID393012
KEGG IDC00473
UniProt IDNot Available
OMIM ID100640 , 103730 , 107740 , 115300 , 120930 , 124020 , 136880 , 146732 , 151675 , 155050 , 164320 , 175100 , 176300 , 176803 , 176870 , 180069 , 180090 , 180100 , 180230 , 180245 , 180250 , 180260 , 180280 , 180290 , 180380 , 222448 , 240150 , 277350 , 300008 , 300009 , 300102 , 308990 , 600073 , 600086 , 600281 , 600463 , 600768 , 601186 , 601617 , 601691 , 602630 , 603687 , 604232 , 604863 , 605072 , 606467 , 606530 , 606623 , 606990 , 607599 , 607849 , 608575 , 608604 , 608830 , 608989 , 610745 , 611474 , 611589 , 611596
ChEBI ID17336
BioCyc IDRETINOL
CTD IDNot Available
Stitch IDVitamin A
PDB IDRTL
ACToR ID3068
Wikipedia LinkVitamin_A
References
Synthesis Reference

William Oroshnik, “Synthesis of Vitamin A, intermediates and conversion thereof to Vitamin A.” U.S. Patent US4092366, issued May, 1948.

MSDSLink
General References
  1. Roncone DP: Xerophthalmia secondary to alcohol-induced malnutrition. Optometry. 2006 Mar;77(3):124-33. [16513513 ]
  2. Norum KR, Blomhoff R: McCollum Award Lecture, 1992: vitamin A absorption, transport, cellular uptake, and storage. Am J Clin Nutr. 1992 Oct;56(4):735-44. [1414975 ]
  3. Graham-Maar RC, Schall JI, Stettler N, Zemel BS, Stallings VA: Elevated vitamin A intake and serum retinol in preadolescent children with cystic fibrosis. Am J Clin Nutr. 2006 Jul;84(1):174-82. [16825693 ]
  4. Sorenson AW, Delhumeau C, Bernstein MS, Costanza MC, Morabia A: Impact of 'Mad Cow Disease' publicity on trends in meat and total vitamin A consumption in Geneva between 1993 and 2000. Eur J Clin Nutr. 2003 Jan;57(1):177-85. [12548314 ]
  5. Alberts D, Ranger-Moore J, Einspahr J, Saboda K, Bozzo P, Liu Y, Xu XC, Lotan R, Warneke J, Salasche S, Stratton S, Levine N, Goldman R, Islas M, Duckett L, Thompson D, Bartels P, Foote J: Safety and efficacy of dose-intensive oral vitamin A in subjects with sun-damaged skin. Clin Cancer Res. 2004 Mar 15;10(6):1875-80. [15041701 ]
  6. Wieringa FT, Dijkhuizen MA, West CE, Thurnham DI, Muhilal, Van der Meer JW: Redistribution of vitamin A after iron supplementation in Indonesian infants. Am J Clin Nutr. 2003 Mar;77(3):651-7. [12600856 ]
  7. Egeland GM, Berti P, Soueida R, Arbour LT, Receveur O, Kuhnlein HV: Age differences in vitamin A intake among Canadian Inuit. Can J Public Health. 2004 Nov-Dec;95(6):465-9. [15622799 ]
  8. Ribaya-Mercado JD, Solon FS, Fermin LS, Perfecto CS, Solon JA, Dolnikowski GG, Russell RM: Dietary vitamin A intakes of Filipino elders with adequate or low liver vitamin A concentrations as assessed by the deuterated-retinol-dilution method: implications for dietary requirements. Am J Clin Nutr. 2004 Apr;79(4):633-41. [15051608 ]
  9. Kieu NT, Yurie K, Hung NT, Yamamoto S, Chuyen NV: Simultaneous analysis of retinol, beta-carotene and tocopherol levels in serum of Vietnamese populations with different incomes. Asia Pac J Clin Nutr. 2002;11(2):92-7. [12074187 ]
  10. Torma H, Vahlquist A: Vitamin A esterification in human epidermis: a relation to keratinocyte differentiation. J Invest Dermatol. 1990 Jan;94(1):132-8. [2295828 ]
  11. Allen LH, Haskell M: Estimating the potential for vitamin A toxicity in women and young children. J Nutr. 2002 Sep;132(9 Suppl):2907S-2919S. [12221269 ]
  12. Ribaya-Mercado JD, Solomons NW, Medrano Y, Bulux J, Dolnikowski GG, Russell RM, Wallace CB: Use of the deuterated-retinol-dilution technique to monitor the vitamin A status of Nicaraguan schoolchildren 1 y after initiation of the Nicaraguan national program of sugar fortification with vitamin A. Am J Clin Nutr. 2004 Nov;80(5):1291-8. [15531678 ]
  13. Marquez M, Yepez CE, Sutil-Naranjo R, Rincon M: [Basic aspects and measurement of the antioxidant vitamins A and E]. Invest Clin. 2002 Sep;43(3):191-204. [12229281 ]
  14. Mills JP, Penniston KL, Tanumihardjo SA: Extra-hepatic vitamin A concentrations in captive Rhesus (Macaca mulatta) and Marmoset (Callithrix jacchus) monkeys fed excess vitamin A. Int J Vitam Nutr Res. 2005 Mar;75(2):126-32. [15929633 ]
  15. Penniston KL, Tanumihardjo SA: The acute and chronic toxic effects of vitamin A. Am J Clin Nutr. 2006 Feb;83(2):191-201. [16469975 ]
  16. Jumpsen JA, Brown NE, Thomson AB, Paul Man SF, Goh YK, Ma D, Clandinin MT: Fatty acids in blood and intestine following docosahexaenoic acid supplementation in adults with cystic fibrosis. J Cyst Fibros. 2006 May;5(2):77-84. Epub 2006 Feb 28. [16507353 ]
  17. Drugs.com [Link]
  18. RxList: The Internet Drug Index (2009). [Link]
Gene Regulation
Up-Regulated Genes
GeneGene SymbolGene IDInteractionChromosomeDetails
Down-Regulated Genes
GeneGene SymbolGene IDInteractionChromosomeDetails

Targets

General Function:
Retinol transporter activity
Specific Function:
Delivers retinol from the liver stores to the peripheral tissues. In plasma, the RBP-retinol complex interacts with transthyretin, this prevents its loss by filtration through the kidney glomeruli.
Gene Name:
RBP4
Uniprot ID:
P02753
Molecular Weight:
23009.8 Da
References
  1. Goodman AB: Retinoid receptors, transporters, and metabolizers as therapeutic targets in late onset Alzheimer disease. J Cell Physiol. 2006 Dec;209(3):598-603. [17001693 ]
  2. Ziouzenkova O, Orasanu G, Sharlach M, Akiyama TE, Berger JP, Viereck J, Hamilton JA, Tang G, Dolnikowski GG, Vogel S, Duester G, Plutzky J: Retinaldehyde represses adipogenesis and diet-induced obesity. Nat Med. 2007 Jun;13(6):695-702. Epub 2007 May 27. [17529981 ]
  3. Wolf G: Serum retinol-binding protein: a link between obesity, insulin resistance, and type 2 diabetes. Nutr Rev. 2007 May;65(5):251-6. [17566551 ]
  4. Liden M, Eriksson U: Development of a versatile reporter assay for studies of retinol uptake and metabolism in vivo. Exp Cell Res. 2005 Nov 1;310(2):401-8. Epub 2005 Sep 8. [16150442 ]
  5. Hinterhuber G, Cauza K, Dingelmaier-Hovorka R, Diem E, Horvat R, Wolff K, Foedinger D: Expression of RPE65, a putative receptor for plasma retinol-binding protein, in nonmelanocytic skin tumours. Br J Dermatol. 2005 Oct;153(4):785-9. [16181461 ]
  6. Breustedt DA, Schonfeld DL, Skerra A: Comparative ligand-binding analysis of ten human lipocalins. Biochim Biophys Acta. 2006 Feb;1764(2):161-73. Epub 2006 Jan 6. [16461020 ]
  7. Wagnerberger S, Schafer C, Bode C, Parlesak A: Saturation of retinol-binding protein correlates closely to the severity of alcohol-induced liver disease. Alcohol. 2006 Jan;38(1):37-43. [16762690 ]
  8. Isken A, Golczak M, Oberhauser V, Hunzelmann S, Driever W, Imanishi Y, Palczewski K, von Lintig J: RBP4 disrupts vitamin A uptake homeostasis in a STRA6-deficient animal model for Matthew-Wood syndrome. Cell Metab. 2008 Mar;7(3):258-68. doi: 10.1016/j.cmet.2008.01.009. [18316031 ]
General Function:
Retinol dehydrogenase activity
Specific Function:
Stereospecific 11-cis retinol dehydrogenase, which catalyzes the final step in the biosynthesis of 11-cis retinaldehyde, the universal chromophore of visual pigments. Also able to oxidize 9-cis-retinol and 13-cis-retinol, but not all-trans-retinol. Active in the presence of NAD as cofactor but not in the presence of NADP.
Gene Name:
RDH5
Uniprot ID:
Q92781
Molecular Weight:
34978.425 Da
References
  1. Zhang M, Hu P, Krois CR, Kane MA, Napoli JL: Altered vitamin A homeostasis and increased size and adiposity in the rdh1-null mouse. FASEB J. 2007 Sep;21(11):2886-96. Epub 2007 Apr 13. [17435174 ]
  2. Maeda A, Maeda T, Imanishi Y, Golczak M, Moise AR, Palczewski K: Aberrant metabolites in mouse models of congenital blinding diseases: formation and storage of retinyl esters. Biochemistry. 2006 Apr 4;45(13):4210-9. [16566595 ]
  3. Dalfo D, Marques N, Albalat R: Analysis of the NADH-dependent retinaldehyde reductase activity of amphioxus retinol dehydrogenase enzymes enhances our understanding of the evolution of the retinol dehydrogenase family. FEBS J. 2007 Jul;274(14):3739-52. Epub 2007 Jul 2. [17608724 ]
  4. Gidlof AC, Ocaya P, Olofsson PS, Torma H, Sirsjo A: Differences in retinol metabolism and proliferative response between neointimal and medial smooth muscle cells. J Vasc Res. 2006;43(4):392-8. Epub 2006 Jul 6. [16837774 ]
  5. Belyaeva OV, Kedishvili NY: Comparative genomic and phylogenetic analysis of short-chain dehydrogenases/reductases with dual retinol/sterol substrate specificity. Genomics. 2006 Dec;88(6):820-30. Epub 2006 Jul 24. [16860536 ]
General Function:
Retinal dehydrogenase activity
Specific Function:
Binds free retinal and cellular retinol-binding protein-bound retinal. Can convert/oxidize retinaldehyde to retinoic acid (By similarity).
Gene Name:
ALDH1A1
Uniprot ID:
P00352
Molecular Weight:
54861.44 Da
References
  1. Asson-Batres MA, Smith WB: Localization of retinaldehyde dehydrogenases and retinoid binding proteins to sustentacular cells, glia, Bowman's gland cells, and stroma: potential sites of retinoic acid synthesis in the postnatal rat olfactory organ. J Comp Neurol. 2006 May 10;496(2):149-71. [16538685 ]
  2. Chambers D, Wilson L, Maden M, Lumsden A: RALDH-independent generation of retinoic acid during vertebrate embryogenesis by CYP1B1. Development. 2007 Apr;134(7):1369-83. Epub 2007 Feb 28. [17329364 ]
  3. Gyamfi MA, Kocsis MG, He L, Dai G, Mendy AJ, Wan YJ: The role of retinoid X receptor alpha in regulating alcohol metabolism. J Pharmacol Exp Ther. 2006 Oct;319(1):360-8. Epub 2006 Jul 7. [16829625 ]
  4. Maden M, Blentic A, Reijntjes S, Seguin S, Gale E, Graham A: Retinoic acid is required for specification of the ventral eye field and for Rathke's pouch in the avian embryo. Int J Dev Biol. 2007;51(3):191-200. [17486539 ]
  5. Huq MD, Tsai NP, Gupta P, Wei LN: Regulation of retinal dehydrogenases and retinoic acid synthesis by cholesterol metabolites. EMBO J. 2006 Jul 12;25(13):3203-13. Epub 2006 Jun 8. [16763553 ]
General Function:
Retinal dehydrogenase activity
Specific Function:
Recognizes as substrates free retinal and cellular retinol-binding protein-bound retinal. Does metabolize octanal and decanal but does not metabolize citral, benzaldehyde, acetaldehyde and propanal efficiently (By similarity).
Gene Name:
ALDH1A2
Uniprot ID:
O94788
Molecular Weight:
56723.495 Da
References
  1. Isken A, Holzschuh J, Lampert JM, Fischer L, Oberhauser V, Palczewski K, von Lintig J: Sequestration of retinyl esters is essential for retinoid signaling in the zebrafish embryo. J Biol Chem. 2007 Jan 12;282(2):1144-51. Epub 2006 Nov 10. [17098734 ]
  2. Halilagic A, Ribes V, Ghyselinck NB, Zile MH, Dolle P, Studer M: Retinoids control anterior and dorsal properties in the developing forebrain. Dev Biol. 2007 Mar 1;303(1):362-75. Epub 2006 Nov 17. [17184764 ]
  3. Asson-Batres MA, Smith WB: Localization of retinaldehyde dehydrogenases and retinoid binding proteins to sustentacular cells, glia, Bowman's gland cells, and stroma: potential sites of retinoic acid synthesis in the postnatal rat olfactory organ. J Comp Neurol. 2006 May 10;496(2):149-71. [16538685 ]
  4. Szatmari I, Pap A, Ruhl R, Ma JX, Illarionov PA, Besra GS, Rajnavolgyi E, Dezso B, Nagy L: PPARgamma controls CD1d expression by turning on retinoic acid synthesis in developing human dendritic cells. J Exp Med. 2006 Oct 2;203(10):2351-62. Epub 2006 Sep 18. [16982809 ]
  5. Nakazawa N, Montedonico S, Takayasu H, Paradisi F, Puri P: Disturbance of retinol transportation causes nitrofen-induced hypoplastic lung. J Pediatr Surg. 2007 Feb;42(2):345-9. [17270546 ]
General Function:
Retinol dehydrogenase activity
Specific Function:
Retinol dehydrogenase with a clear preference for NADP. Converts all-trans-retinal to all-trans-retinol. May play a role in the regeneration of visual pigment at high light intensity (By similarity).
Gene Name:
RDH8
Uniprot ID:
Q9NYR8
Molecular Weight:
33755.02 Da
References
  1. Overington JP, Al-Lazikani B, Hopkins AL: How many drug targets are there? Nat Rev Drug Discov. 2006 Dec;5(12):993-6. [17139284 ]
  2. Imming P, Sinning C, Meyer A: Drugs, their targets and the nature and number of drug targets. Nat Rev Drug Discov. 2006 Oct;5(10):821-34. [17016423 ]
  3. Han W, Shen Y, Wang J, Yip S, Yap MK: [Establishing the linkage disequilibrium pattern for the all-trans-retinol dehydrogenase (RDH8) gene]. Zhonghua Yan Ke Za Zhi. 2006 Jul;42(7):642-8. [17081426 ]
  4. Han W, Yip SP, Wang J, Yap MK: Using denaturing HPLC for SNP discovery and genotyping, and establishing the linkage disequilibrium pattern for the all-trans-retinol dehydrogenase (RDH8) gene. J Hum Genet. 2004;49(1):16-23. Epub 2003 Dec 6. [14661078 ]
  5. Fishman GA, Roberts MF, Derlacki DJ, Grimsby JL, Yamamoto H, Sharon D, Nishiguchi KM, Dryja TP: Novel mutations in the cellular retinaldehyde-binding protein gene (RLBP1) associated with retinitis punctata albescens: evidence of interfamilial genetic heterogeneity and fundus changes in heterozygotes. Arch Ophthalmol. 2004 Jan;122(1):70-5. [14718298 ]
General Function:
Transporter activity
Specific Function:
Intracellular transport of retinol.
Gene Name:
RBP1
Uniprot ID:
P09455
Molecular Weight:
15850.13 Da
References
  1. Yapi HF, Ahiboh H, Ago K, Ake M, Monnet D: [Protein profile and vitamin A in children of school age in Ivory Coast]. Ann Biol Clin (Paris). 2005 May-Jun;63(3):291-5. [15951260 ]
  2. Quadro L, Hamberger L, Gottesman ME, Wang F, Colantuoni V, Blaner WS, Mendelsohn CL: Pathways of vitamin A delivery to the embryo: insights from a new tunable model of embryonic vitamin A deficiency. Endocrinology. 2005 Oct;146(10):4479-90. Epub 2005 Jun 30. [15994349 ]
  3. Harrison EH: Mechanisms of digestion and absorption of dietary vitamin A. Annu Rev Nutr. 2005;25:87-103. [16011460 ]
  4. Paci E, Greene LH, Jones RM, Smith LJ: Characterization of the molten globule state of retinol-binding protein using a molecular dynamics simulation approach. FEBS J. 2005 Sep;272(18):4826-38. [16156801 ]
  5. Folli C, Viglione S, Busconi M, Berni R: Biochemical basis for retinol deficiency induced by the I41N and G75D mutations in human plasma retinol-binding protein. Biochem Biophys Res Commun. 2005 Nov 4;336(4):1017-22. [16157297 ]
General Function:
Serine-type peptidase activity
Specific Function:
IRBP shuttles 11-cis and all trans retinoids between the retinol isomerase in the pigment epithelium and the visual pigments in the photoreceptor cells of the retina.
Gene Name:
RBP3
Uniprot ID:
P10745
Molecular Weight:
135361.46 Da
References
  1. Qtaishat NM, Wiggert B, Pepperberg DR: Interphotoreceptor retinoid-binding protein (IRBP) promotes the release of all-trans retinol from the isolated retina following rhodopsin bleaching illumination. Exp Eye Res. 2005 Oct;81(4):455-63. Epub 2005 Jun 2. [15935345 ]
  2. Wu Q, Blakeley LR, Cornwall MC, Crouch RK, Wiggert BN, Koutalos Y: Interphotoreceptor retinoid-binding protein is the physiologically relevant carrier that removes retinol from rod photoreceptor outer segments. Biochemistry. 2007 Jul 24;46(29):8669-79. Epub 2007 Jun 30. [17602665 ]
  3. Kolesnikov AV, Ala-Laurila P, Shukolyukov SA, Crouch RK, Wiggert B, Estevez ME, Govardovskii VI, Cornwall MC: Visual cycle and its metabolic support in gecko photoreceptors. Vision Res. 2007 Feb;47(3):363-74. Epub 2006 Oct 16. [17049961 ]
  4. Duncan T, Fariss RN, Wiggert B: Confocal immunolocalization of bovine serum albumin, serum retinol-binding protein, and interphotoreceptor retinoid-binding protein in bovine retina. Mol Vis. 2006 Dec 22;12:1632-9. [17200663 ]
  5. Salvador-Silva M, Ghosh S, Bertazolli-Filho R, Boatright JH, Nickerson JM, Garwin GG, Saari JC, Coca-Prados M: Retinoid processing proteins in the ocular ciliary epithelium. Mol Vis. 2005 May 18;11:356-65. [15928609 ]
General Function:
Retinol dehydrogenase activity
Specific Function:
Catalyzes the reduction of all-trans-retinal to all-trans-retinol in the presence of NADPH.
Gene Name:
DHRS3
Uniprot ID:
O75911
Molecular Weight:
33548.115 Da
References
  1. Overington JP, Al-Lazikani B, Hopkins AL: How many drug targets are there? Nat Rev Drug Discov. 2006 Dec;5(12):993-6. [17139284 ]
  2. Imming P, Sinning C, Meyer A: Drugs, their targets and the nature and number of drug targets. Nat Rev Drug Discov. 2006 Oct;5(10):821-34. [17016423 ]
  3. Haeseleer F, Huang J, Lebioda L, Saari JC, Palczewski K: Molecular characterization of a novel short-chain dehydrogenase/reductase that reduces all-trans-retinal. J Biol Chem. 1998 Aug 21;273(34):21790-9. [9705317 ]
  4. Cerignoli F, Guo X, Cardinali B, Rinaldi C, Casaletto J, Frati L, Screpanti I, Gudas LJ, Gulino A, Thiele CJ, Giannini G: retSDR1, a short-chain retinol dehydrogenase/reductase, is retinoic acid-inducible and frequently deleted in human neuroblastoma cell lines. Cancer Res. 2002 Feb 15;62(4):1196-204. [11861404 ]
  5. Chai Z, Brereton P, Suzuki T, Sasano H, Obeyesekere V, Escher G, Saffery R, Fuller P, Enriquez C, Krozowski Z: 17 beta-hydroxysteroid dehydrogenase type XI localizes to human steroidogenic cells. Endocrinology. 2003 May;144(5):2084-91. [12697717 ]
General Function:
Thyroid hormone binding
Specific Function:
Recognizes as substrates free retinal and cellular retinol-binding protein-bound retinal. Seems to be the key enzyme in the formation of an RA gradient along the dorso-ventral axis during the early eye development and also in the development of the olfactory system (By similarity).
Gene Name:
ALDH1A3
Uniprot ID:
P47895
Molecular Weight:
56107.995 Da
References
  1. Halilagic A, Ribes V, Ghyselinck NB, Zile MH, Dolle P, Studer M: Retinoids control anterior and dorsal properties in the developing forebrain. Dev Biol. 2007 Mar 1;303(1):362-75. Epub 2006 Nov 17. [17184764 ]
  2. Nakazawa N, Montedonico S, Takayasu H, Paradisi F, Puri P: Disturbance of retinol transportation causes nitrofen-induced hypoplastic lung. J Pediatr Surg. 2007 Feb;42(2):345-9. [17270546 ]
  3. Maden M, Blentic A, Reijntjes S, Seguin S, Gale E, Graham A: Retinoic acid is required for specification of the ventral eye field and for Rathke's pouch in the avian embryo. Int J Dev Biol. 2007;51(3):191-200. [17486539 ]
  4. Everts HB, Sundberg JP, Ong DE: Immunolocalization of retinoic acid biosynthesis systems in selected sites in rat. Exp Cell Res. 2005 Aug 15;308(2):309-19. [15950969 ]
General Function:
Transporter activity
Specific Function:
Soluble retinoid carrier essential the proper function of both rod and cone photoreceptors. Participates in the regeneration of active 11-cis-retinol and 11-cis-retinaldehyde, from the inactive 11-trans products of the rhodopsin photocycle and in the de novo synthesis of these retinoids from 11-trans metabolic precursors. The cycling of retinoids between photoreceptor and adjacent pigment epithelium cells is known as the 'visual cycle'.
Gene Name:
RLBP1
Uniprot ID:
P12271
Molecular Weight:
36474.02 Da
References
  1. Salvador-Silva M, Ghosh S, Bertazolli-Filho R, Boatright JH, Nickerson JM, Garwin GG, Saari JC, Coca-Prados M: Retinoid processing proteins in the ocular ciliary epithelium. Mol Vis. 2005 May 18;11:356-65. [15928609 ]
  2. Muniz A, Villazana-Espinoza ET, Thackeray B, Tsin AT: 11-cis-Acyl-CoA:retinol O-acyltransferase activity in the primary culture of chicken Muller cells. Biochemistry. 2006 Oct 10;45(40):12265-73. [17014079 ]
  3. Wenzel A, von Lintig J, Oberhauser V, Tanimoto N, Grimm C, Seeliger MW: RPE65 is essential for the function of cone photoreceptors in NRL-deficient mice. Invest Ophthalmol Vis Sci. 2007 Feb;48(2):534-42. [17251447 ]
  4. Vogel JS, Bullen EC, Teygong CL, Howard EW: Identification of the RLBP1 gene promoter. Invest Ophthalmol Vis Sci. 2007 Aug;48(8):3872-7. [17652763 ]
General Function:
Transporter activity
Specific Function:
Intracellular transport of retinol.
Gene Name:
RBP7
Uniprot ID:
Q96R05
Molecular Weight:
15535.585 Da
References
  1. Overington JP, Al-Lazikani B, Hopkins AL: How many drug targets are there? Nat Rev Drug Discov. 2006 Dec;5(12):993-6. [17139284 ]
  2. Imming P, Sinning C, Meyer A: Drugs, their targets and the nature and number of drug targets. Nat Rev Drug Discov. 2006 Oct;5(10):821-34. [17016423 ]
  3. Caprioli A, Zhu H, Sato TN: CRBP-III:lacZ expression pattern reveals a novel heterogeneity of vascular endothelial cells. Genesis. 2004 Nov;40(3):139-45. [15493015 ]
General Function:
Retinol dehydrogenase activity
Specific Function:
Exhibits an oxidoreductive catalytic activity towards retinoids. Most efficient as an NADPH-dependent retinal reductase. Displays high activity toward 9-cis and all-trans-retinol. Also involved in the metabolism of short-chain aldehydes. No steroid dehydrogenase activity detected. Might be the key enzyme in the formation of 11-cis-retinal from 11-cis-retinol during regeneration of the cone visual pigments.
Gene Name:
RDH12
Uniprot ID:
Q96NR8
Molecular Weight:
35093.455 Da
References
  1. Keller B, Adamski J: RDH12, a retinol dehydrogenase causing Leber's congenital amaurosis, is also involved in steroid metabolism. J Steroid Biochem Mol Biol. 2007 May;104(3-5):190-4. Epub 2007 Mar 23. [17512723 ]
  2. Maeda A, Maeda T, Imanishi Y, Sun W, Jastrzebska B, Hatala DA, Winkens HJ, Hofmann KP, Janssen JJ, Baehr W, Driessen CA, Palczewski K: Retinol dehydrogenase (RDH12) protects photoreceptors from light-induced degeneration in mice. J Biol Chem. 2006 Dec 8;281(49):37697-704. Epub 2006 Oct 10. [17032653 ]
  3. Thompson DA, Janecke AR, Lange J, Feathers KL, Hubner CA, McHenry CL, Stockton DW, Rammesmayer G, Lupski JR, Antinolo G, Ayuso C, Baiget M, Gouras P, Heckenlively JR, den Hollander A, Jacobson SG, Lewis RA, Sieving PA, Wissinger B, Yzer S, Zrenner E, Utermann G, Gal A: Retinal degeneration associated with RDH12 mutations results from decreased 11-cis retinal synthesis due to disruption of the visual cycle. Hum Mol Genet. 2005 Dec 15;14(24):3865-75. Epub 2005 Nov 3. [16269441 ]
General Function:
Transferase activity, transferring acyl groups
Specific Function:
Transfers the acyl group from the sn-1 position of phosphatidylcholine to all-trans retinol, producing all-trans retinyl esters. Retinyl esters are storage forms of vitamin A. LRAT plays a critical role in vision. It provides the all-trans retinyl ester substrates for the isomerohydrolase which processes the esters into 11-cis-retinol in the retinal pigment epithelium; due to a membrane-associated alcohol dehydrogenase, 11 cis-retinol is oxidized and converted into 11-cis-retinaldehyde which is the chromophore for rhodopsin and the cone photopigments.
Gene Name:
LRAT
Uniprot ID:
O95237
Molecular Weight:
25702.635 Da
References
  1. Kaschula CH, Jin MH, Desmond-Smith NS, Travis GH: Acyl CoA:retinol acyltransferase (ARAT) activity is present in bovine retinal pigment epithelium. Exp Eye Res. 2006 Jan;82(1):111-21. Epub 2005 Jul 27. [16054134 ]
  2. Liu L, Gudas LJ: Disruption of the lecithin:retinol acyltransferase gene makes mice more susceptible to vitamin A deficiency. J Biol Chem. 2005 Dec 2;280(48):40226-34. Epub 2005 Sep 20. [16174770 ]
General Function:
Alcohol dehydrogenase (nadp+) activity
Specific Function:
Exhibits an oxidoreductive catalytic activity towards retinoids. Most efficient as an NADPH-dependent retinal reductase. Displays high activity toward 9-cis and all-trans-retinol. No steroid dehydrogenase activity detected.
Gene Name:
RDH14
Uniprot ID:
Q9HBH5
Molecular Weight:
36864.355 Da
References
  1. Overington JP, Al-Lazikani B, Hopkins AL: How many drug targets are there? Nat Rev Drug Discov. 2006 Dec;5(12):993-6. [17139284 ]
  2. Imming P, Sinning C, Meyer A: Drugs, their targets and the nature and number of drug targets. Nat Rev Drug Discov. 2006 Oct;5(10):821-34. [17016423 ]
General Function:
Oxidoreductase activity
Specific Function:
Retinol saturase carrying out the saturation of the 13-14 double bond of all-trans-retinol to produce all-trans-13,14-dihydroretinol. Has activity toward all-trans-retinol as substrate. Does not use all-trans-retinoic acid nor 9-cis, 11-cis or 13-cis-retinol isomers as substrates. May play a role in the metabolism of vitamin A (By similarity).
Gene Name:
RETSAT
Uniprot ID:
Q6NUM9
Molecular Weight:
66818.935 Da
References
  1. Moise AR, Isken A, Dominguez M, de Lera AR, von Lintig J, Palczewski K: Specificity of zebrafish retinol saturase: formation of all-trans-13,14-dihydroretinol and all-trans-7,8- dihydroretinol. Biochemistry. 2007 Feb 20;46(7):1811-20. Epub 2007 Jan 25. [17253779 ]
General Function:
Lipid transporter activity
Specific Function:
APOD occurs in the macromolecular complex with lecithin-cholesterol acyltransferase. It is probably involved in the transport and binding of bilin. Appears to be able to transport a variety of ligands in a number of different contexts.
Gene Name:
APOD
Uniprot ID:
P05090
Molecular Weight:
21275.37 Da
References
  1. Breustedt DA, Schonfeld DL, Skerra A: Comparative ligand-binding analysis of ten human lipocalins. Biochim Biophys Acta. 2006 Feb;1764(2):161-73. Epub 2006 Jan 6. [16461020 ]
General Function:
Receptor binding
Specific Function:
Reduces all-trans-retinal and 9-cis retinal. Can also catalyze the oxidation of all-trans-retinol with NADP as co-factor, but with much lower efficiency. Reduces alkyl phenyl ketones and alpha-dicarbonyl compounds with aromatic rings, such as pyrimidine-4-aldehyde, 3-benzoylpyridine, 4-benzoylpyridine, menadione and 4-hexanoylpyridine. Has no activity towards aliphatic aldehydes and ketones (By similarity).
Gene Name:
DHRS4
Uniprot ID:
Q9BTZ2
Molecular Weight:
29536.885 Da
References
  1. Du K, Liu GF, Xie JP, Song XH, Li R, Liang B, Huang DY: A 27.368 kDa retinal reductase in New Zealand white rabbit liver cytosol encoded by the peroxisomal retinol dehydrogenase-reductase cDNA: purification and characterization of the enzyme. Biochem Cell Biol. 2007 Apr;85(2):209-17. [17534402 ]
General Function:
Not Available
Specific Function:
Keratin-binding protein required for epithelial cell polarization. Involved in apical junction complex (AJC) assembly via its interaction with PARD3. Required for ciliogenesis.
Gene Name:
FBF1
Uniprot ID:
Q8TES7
Molecular Weight:
125445.19 Da
References
  1. N'soukpoe-Kossi CN, Sedaghat-Herati R, Ragi C, Hotchandani S, Tajmir-Riahi HA: Retinol and retinoic acid bind human serum albumin: stability and structural features. Int J Biol Macromol. 2007 Apr 10;40(5):484-90. Epub 2006 Nov 24. [17184834 ]
General Function:
Transporter activity
Specific Function:
Catalyzes the conversion of PGH2 to PGD2, a prostaglandin involved in smooth muscle contraction/relaxation and a potent inhibitor of platelet aggregation. Involved in a variety of CNS functions, such as sedation, NREM sleep and PGE2-induced allodynia, and may have an anti-apoptotic role in oligodendrocytes. Binds small non-substrate lipophilic molecules, including biliverdin, bilirubin, retinal, retinoic acid and thyroid hormone, and may act as a scavenger for harmful hydrophopic molecules and as a secretory retinoid and thyroid hormone transporter. Possibly involved in development and maintenance of the blood-brain, blood-retina, blood-aqueous humor and blood-testis barrier. It is likely to play important roles in both maturation and maintenance of the central nervous system and male reproductive system.
Gene Name:
PTGDS
Uniprot ID:
P41222
Molecular Weight:
21028.665 Da
References
  1. Breustedt DA, Schonfeld DL, Skerra A: Comparative ligand-binding analysis of ten human lipocalins. Biochim Biophys Acta. 2006 Feb;1764(2):161-73. Epub 2006 Jan 6. [16461020 ]
General Function:
Retinol dehydrogenase activity
Specific Function:
Exhibits an oxidoreductive catalytic activity towards retinoids. Most efficient as an NADPH-dependent retinal reductase. Displays high activity towards 9-cis and all-trans-retinol. Also involved in the metabolism of short-chain aldehydes. No steroid dehydrogenase activity detected.
Gene Name:
RDH11
Uniprot ID:
Q8TC12
Molecular Weight:
35385.955 Da
References
  1. Gallego O, Belyaeva OV, Porte S, Ruiz FX, Stetsenko AV, Shabrova EV, Kostereva NV, Farres J, Pares X, Kedishvili NY: Comparative functional analysis of human medium-chain dehydrogenases, short-chain dehydrogenases/reductases and aldo-keto reductases with retinoids. Biochem J. 2006 Oct 1;399(1):101-9. [16787387 ]
General Function:
Oxidoreductase activity
Specific Function:
Does not exhibit retinol dehydrogenase (RDH) activity in vitro.
Gene Name:
RDH13
Uniprot ID:
Q8NBN7
Molecular Weight:
35931.85 Da
References
  1. Keller B, Adamski J: RDH12, a retinol dehydrogenase causing Leber's congenital amaurosis, is also involved in steroid metabolism. J Steroid Biochem Mol Biol. 2007 May;104(3-5):190-4. Epub 2007 Mar 23. [17512723 ]
General Function:
Transporter activity
Specific Function:
Intracellular transport of retinol.
Gene Name:
RBP2
Uniprot ID:
P50120
Molecular Weight:
15706.595 Da
References
  1. Suruga K, Kitagawa M, Yasutake H, Takase S, Goda T: Diet-related variation in cellular retinol-binding protein type II gene expression in rat jejunum. Br J Nutr. 2005 Dec;94(6):890-5. [16351764 ]
General Function:
Transporter activity
Specific Function:
Intracellular transport of retinol.
Gene Name:
RBP5
Uniprot ID:
P82980
Molecular Weight:
15931.17 Da
References
  1. O'Byrne SM, Wongsiriroj N, Libien J, Vogel S, Goldberg IJ, Baehr W, Palczewski K, Blaner WS: Retinoid absorption and storage is impaired in mice lacking lecithin:retinol acyltransferase (LRAT). J Biol Chem. 2005 Oct 21;280(42):35647-57. Epub 2005 Aug 22. [16115871 ]
General Function:
Zinc ion binding
Specific Function:
Receptor for retinoic acid. Retinoic acid receptors bind as heterodimers to their target response elements in response to their ligands, all-trans or 9-cis retinoic acid, and regulate gene expression in various biological processes. The RAR/RXR heterodimers bind to the retinoic acid response elements (RARE) composed of tandem 5'-AGGTCA-3' sites known as DR1-DR5. In the absence of ligand, acts mainly as an activator of gene expression due to weak binding to corepressors. Required for limb bud development. In concert with RARA or RARB, required for skeletal growth, matrix homeostasis and growth plate function (By similarity).
Gene Name:
RARG
Uniprot ID:
P13631
Molecular Weight:
50341.405 Da
Binding/Activity Constants
TypeValueAssay TypeAssay Source
AC500.17 uMATG_RARg_TRANSAttagene
AC500.30 uMATG_DR5_CISAttagene
References
  1. Sipes NS, Martin MT, Kothiya P, Reif DM, Judson RS, Richard AM, Houck KA, Dix DJ, Kavlock RJ, Knudsen TB: Profiling 976 ToxCast chemicals across 331 enzymatic and receptor signaling assays. Chem Res Toxicol. 2013 Jun 17;26(6):878-95. doi: 10.1021/tx400021f. Epub 2013 May 16. [23611293 ]
General Function:
Zinc ion binding
Specific Function:
Receptor for retinoic acid. Retinoic acid receptors bind as heterodimers to their target response elements in response to their ligands, all-trans or 9-cis retinoic acid, and regulate gene expression in various biological processes. The RXR/RAR heterodimers bind to the retinoic acid response elements (RARE) composed of tandem 5'-AGGTCA-3' sites known as DR1-DR5. In the absence of ligand, the RXR-RAR heterodimers associate with a multiprotein complex containing transcription corepressors that induce histone acetylation, chromatin condensation and transcriptional suppression. On ligand binding, the corepressors dissociate from the receptors and associate with the coactivators leading to transcriptional activation. RARA plays an essential role in the regulation of retinoic acid-induced germ cell development during spermatogenesis. Has a role in the survival of early spermatocytes at the beginning prophase of meiosis. In Sertoli cells, may promote the survival and development of early meiotic prophase spermatocytes. In concert with RARG, required for skeletal growth, matrix homeostasis and growth plate function (By similarity). Regulates expression of target genes in a ligand-dependent manner by recruiting chromatin complexes containing KMT2E/MLL5. Mediates retinoic acid-induced granulopoiesis.
Gene Name:
RARA
Uniprot ID:
P10276
Molecular Weight:
50770.805 Da
Binding/Activity Constants
TypeValueAssay TypeAssay Source
AC500.19 uMATG_RARa_TRANSAttagene
References
  1. Sipes NS, Martin MT, Kothiya P, Reif DM, Judson RS, Richard AM, Houck KA, Dix DJ, Kavlock RJ, Knudsen TB: Profiling 976 ToxCast chemicals across 331 enzymatic and receptor signaling assays. Chem Res Toxicol. 2013 Jun 17;26(6):878-95. doi: 10.1021/tx400021f. Epub 2013 May 16. [23611293 ]
General Function:
Zinc ion binding
Specific Function:
Nuclear receptor that binds and is activated by variety of endogenous and xenobiotic compounds. Transcription factor that activates the transcription of multiple genes involved in the metabolism and secretion of potentially harmful xenobiotics, drugs and endogenous compounds. Activated by the antibiotic rifampicin and various plant metabolites, such as hyperforin, guggulipid, colupulone, and isoflavones. Response to specific ligands is species-specific. Activated by naturally occurring steroids, such as pregnenolone and progesterone. Binds to a response element in the promoters of the CYP3A4 and ABCB1/MDR1 genes.
Gene Name:
NR1I2
Uniprot ID:
O75469
Molecular Weight:
49761.245 Da
Binding/Activity Constants
TypeValueAssay TypeAssay Source
AC500.32 uMATG_PXR_TRANSAttagene
AC500.88 uMATG_PXRE_CISAttagene
References
  1. Sipes NS, Martin MT, Kothiya P, Reif DM, Judson RS, Richard AM, Houck KA, Dix DJ, Kavlock RJ, Knudsen TB: Profiling 976 ToxCast chemicals across 331 enzymatic and receptor signaling assays. Chem Res Toxicol. 2013 Jun 17;26(6):878-95. doi: 10.1021/tx400021f. Epub 2013 May 16. [23611293 ]
General Function:
Zinc ion binding
Specific Function:
Receptor for retinoic acid. Retinoic acid receptors bind as heterodimers to their target response elements in response to their ligands, all-trans or 9-cis retinoic acid, and regulate gene expression in various biological processes. The RAR/RXR heterodimers bind to the retinoic acid response elements (RARE) composed of tandem 5'-AGGTCA-3' sites known as DR1-DR5 (By similarity). Specifically binds 9-cis retinoic acid (9C-RA).
Gene Name:
RXRB
Uniprot ID:
P28702
Molecular Weight:
56921.38 Da
Binding/Activity Constants
TypeValueAssay TypeAssay Source
AC500.86 uMATG_RXRb_TRANSAttagene
References
  1. Sipes NS, Martin MT, Kothiya P, Reif DM, Judson RS, Richard AM, Houck KA, Dix DJ, Kavlock RJ, Knudsen TB: Profiling 976 ToxCast chemicals across 331 enzymatic and receptor signaling assays. Chem Res Toxicol. 2013 Jun 17;26(6):878-95. doi: 10.1021/tx400021f. Epub 2013 May 16. [23611293 ]
General Function:
Zinc ion binding
Specific Function:
Nuclear hormone receptor. The steroid hormones and their receptors are involved in the regulation of eukaryotic gene expression and affect cellular proliferation and differentiation in target tissues. Ligand-dependent nuclear transactivation involves either direct homodimer binding to a palindromic estrogen response element (ERE) sequence or association with other DNA-binding transcription factors, such as AP-1/c-Jun, c-Fos, ATF-2, Sp1 and Sp3, to mediate ERE-independent signaling. Ligand binding induces a conformational change allowing subsequent or combinatorial association with multiprotein coactivator complexes through LXXLL motifs of their respective components. Mutual transrepression occurs between the estrogen receptor (ER) and NF-kappa-B in a cell-type specific manner. Decreases NF-kappa-B DNA-binding activity and inhibits NF-kappa-B-mediated transcription from the IL6 promoter and displace RELA/p65 and associated coregulators from the promoter. Recruited to the NF-kappa-B response element of the CCL2 and IL8 promoters and can displace CREBBP. Present with NF-kappa-B components RELA/p65 and NFKB1/p50 on ERE sequences. Can also act synergistically with NF-kappa-B to activate transcription involving respective recruitment adjacent response elements; the function involves CREBBP. Can activate the transcriptional activity of TFF1. Also mediates membrane-initiated estrogen signaling involving various kinase cascades. Isoform 3 is involved in activation of NOS3 and endothelial nitric oxide production. Isoforms lacking one or several functional domains are thought to modulate transcriptional activity by competitive ligand or DNA binding and/or heterodimerization with the full length receptor. Essential for MTA1-mediated transcriptional regulation of BRCA1 and BCAS3. Isoform 3 can bind to ERE and inhibit isoform 1.
Gene Name:
ESR1
Uniprot ID:
P03372
Molecular Weight:
66215.45 Da
Binding/Activity Constants
TypeValueAssay TypeAssay Source
AC500.93 uMTox21_ERa_LUC_BG1_AgonistTox21/NCGC
AC507.90 uMATG_ERa_TRANSAttagene
AC508.90 uMATG_ERE_CISAttagene
References
  1. Sipes NS, Martin MT, Kothiya P, Reif DM, Judson RS, Richard AM, Houck KA, Dix DJ, Kavlock RJ, Knudsen TB: Profiling 976 ToxCast chemicals across 331 enzymatic and receptor signaling assays. Chem Res Toxicol. 2013 Jun 17;26(6):878-95. doi: 10.1021/tx400021f. Epub 2013 May 16. [23611293 ]
General Function:
Oxygen binding
Specific Function:
Catalyzes the formation of aromatic C18 estrogens from C19 androgens.
Gene Name:
CYP19A1
Uniprot ID:
P11511
Molecular Weight:
57882.48 Da
Binding/Activity Constants
TypeValueAssay TypeAssay Source
AC501.77 uMTox21_Aromatase_InhibitionTox21/NCGC
References
  1. Sipes NS, Martin MT, Kothiya P, Reif DM, Judson RS, Richard AM, Houck KA, Dix DJ, Kavlock RJ, Knudsen TB: Profiling 976 ToxCast chemicals across 331 enzymatic and receptor signaling assays. Chem Res Toxicol. 2013 Jun 17;26(6):878-95. doi: 10.1021/tx400021f. Epub 2013 May 16. [23611293 ]
General Function:
Zinc ion binding
Specific Function:
Receptor for retinoic acid. Retinoic acid receptors bind as heterodimers to their target response elements in response to their ligands, all-trans or 9-cis retinoic acid, and regulate gene expression in various biological processes. The RAR/RXR heterodimers bind to the retinoic acid response elements (RARE) composed of tandem 5'-AGGTCA-3' sites known as DR1-DR5. The high affinity ligand for RXRs is 9-cis retinoic acid. RXRA serves as a common heterodimeric partner for a number of nuclear receptors. The RXR/RAR heterodimers bind to the retinoic acid response elements (RARE) composed of tandem 5'-AGGTCA-3' sites known as DR1-DR5. In the absence of ligand, the RXR-RAR heterodimers associate with a multiprotein complex containing transcription corepressors that induce histone acetylation, chromatin condensation and transcriptional suppression. On ligand binding, the corepressors dissociate from the receptors and associate with the coactivators leading to transcriptional activation. The RXRA/PPARA heterodimer is required for PPARA transcriptional activity on fatty acid oxidation genes such as ACOX1 and the P450 system genes.
Gene Name:
RXRA
Uniprot ID:
P19793
Molecular Weight:
50810.835 Da
Binding/Activity Constants
TypeValueAssay TypeAssay Source
AC505.27 uMATG_RXRa_TRANSAttagene
References
  1. Sipes NS, Martin MT, Kothiya P, Reif DM, Judson RS, Richard AM, Houck KA, Dix DJ, Kavlock RJ, Knudsen TB: Profiling 976 ToxCast chemicals across 331 enzymatic and receptor signaling assays. Chem Res Toxicol. 2013 Jun 17;26(6):878-95. doi: 10.1021/tx400021f. Epub 2013 May 16. [23611293 ]
General Function:
Zinc ion binding
Specific Function:
Nuclear hormone receptor. Transcription factor that mediates the action of vitamin D3 by controlling the expression of hormone sensitive genes. Recruited to promoters via its interaction with BAZ1B/WSTF which mediates the interaction with acetylated histones, an essential step for VDR-promoter association. Plays a central role in calcium homeostasis.
Gene Name:
VDR
Uniprot ID:
P11473
Molecular Weight:
48288.64 Da
Binding/Activity Constants
TypeValueAssay TypeAssay Source
AC506.08 uMATG_VDRE_CISAttagene
References
  1. Sipes NS, Martin MT, Kothiya P, Reif DM, Judson RS, Richard AM, Houck KA, Dix DJ, Kavlock RJ, Knudsen TB: Profiling 976 ToxCast chemicals across 331 enzymatic and receptor signaling assays. Chem Res Toxicol. 2013 Jun 17;26(6):878-95. doi: 10.1021/tx400021f. Epub 2013 May 16. [23611293 ]
General Function:
Zinc ion binding
Specific Function:
Transcriptional regulator which is important for the differentiation and maintenance of meso-diencephalic dopaminergic (mdDA) neurons during development. It is crucial for expression of a set of genes such as SLC6A3, SLC18A2, TH and DRD2 which are essential for development of mdDA neurons (By similarity).
Gene Name:
NR4A2
Uniprot ID:
P43354
Molecular Weight:
66590.375 Da
Binding/Activity Constants
TypeValueAssay TypeAssay Source
AC507.20 uMATG_NURR1_TRANSAttagene
References
  1. Sipes NS, Martin MT, Kothiya P, Reif DM, Judson RS, Richard AM, Houck KA, Dix DJ, Kavlock RJ, Knudsen TB: Profiling 976 ToxCast chemicals across 331 enzymatic and receptor signaling assays. Chem Res Toxicol. 2013 Jun 17;26(6):878-95. doi: 10.1021/tx400021f. Epub 2013 May 16. [23611293 ]