Complement C1s subcomponent

NameComplement C1s subcomponent
Synonyms
  • 3.4.21.42
  • C1 esterase
  • Complement component 1 subcomponent s
Gene NameC1S
OrganismHuman
Amino acid sequence
>lcl|BSEQ0011082|Complement C1s subcomponent
MWCIVLFSLLAWVYAEPTMYGEILSPNYPQAYPSEVEKSWDIEVPEGYGIHLYFTHLDIE
LSENCAYDSVQIISGDTEEGRLCGQRSSNNPHSPIVEEFQVPYNKLQVIFKSDFSNEERF
TGFAAYYVATDINECTDFVDVPCSHFCNNFIGGYFCSCPPEYFLHDDMKNCGVNCSGDVF
TALIGEIASPNYPKPYPENSRCEYQIRLEKGFQVVVTLRREDFDVEAADSAGNCLDSLVF
VAGDRQFGPYCGHGFPGPLNIETKSNALDIIFQTDLTGQKKGWKLRYHGDPMPCPKEDTP
NSVWEPAKAKYVFRDVVQITCLDGFEVVEGRVGATSFYSTCQSNGKWSNSKLKCQPVDCG
IPESIENGKVEDPESTLFGSVIRYTCEEPYYYMENGGGGEYHCAGNGSWVNEVLGPELPK
CVPVCGVPREPFEEKQRIIGGSDADIKNFPWQVFFDNPWAGGALINEYWVLTAAHVVEGN
REPTMYVGSTSVQTSRLAKSKMLTPEHVFIHPGWKLLEVPEGRTNFDNDIALVRLKDPVK
MGPTVSPICLPGTSSDYNLMDGDLGLISGWGRTEKRDRAVRLKAARLPVAPLRKCKEVKV
EKPTADAEAYVFTPNMICAGGEKGMDSCKGDSGGAFAVQDPNDKTKFYAAGLVSWGPQCG
TYGLYTRVKNYVDWIMKTMQENSTPRED
Number of residues688
Molecular Weight76683.905
Theoretical pI4.59
GO Classification
Functions
  • calcium ion binding
  • serine-type endopeptidase activity
  • identical protein binding
Processes
  • proteolysis
  • complement activation
  • innate immune response
  • complement activation, classical pathway
Components
  • extracellular region
  • extracellular exosome
  • blood microparticle
General FunctionSerine-type endopeptidase activity
Specific FunctionC1s B chain is a serine protease that combines with C1q and C1r to form C1, the first component of the classical pathway of the complement system. C1r activates C1s so that it can, in turn, activate C2 and C4.
Pfam Domain Function
Transmembrane RegionsNot Available
GenBank Protein ID763110
UniProtKB IDP09871
UniProtKB Entry NameC1S_HUMAN
Cellular LocationCytoplasmic
Gene sequence
>lcl|BSEQ0011083|Complement C1s subcomponent (C1S)
ATGTGGTGCATTGTCCTGTTTTCACTTTTGGCATGGGTTTATGCTGAGCCTACCATGTAT
GGGGAGATCCTGTCCCCTAACTATCCTCAGGCATATCCCAGTGAGGTAGAGAAATCTTGG
GACATAGAAGTTCCTGAAGGGTATGGGATTCACCTCTACTTCACCCATCTGGACATTGAG
CTGTCAGAGAACTGTGCGTATGACTCAGTGCAGATAATCTCAGGAGACACTGAAGAAGGG
AGGCTCTGTGGACAGAGGAGCAGTAACAATCCCCACTCTCCAATTGTGGAAGAGTTCCAA
GTCCCATACAACAAACTCCAGGTGATCTTTAAGTCAGACTTTTCCAATGAAGAGCGTTTT
ACGGGGTTTGCTGCATACTATGTTGCCACAGACATAAATGAATGCACAGATTTTGTAGAT
GTCCCTTGTAGCCACTTCTGCAACAATTTCATTGGTGGTTACTTCTGCTCCTGCCCCCCG
GAATATTTCCTCCATGATGACATGAAGAATTGCGGAGTTAATTGCAGTGGGGATGTATTC
ACTGCACTGATTGGGGAGATTGCAAGTCCCAATTATCCCAAACCATATCCAGAGAACTCA
AGGTGTGAATACCAGATCCGGTTGGAGAAAGGGTTCCAAGTGGTGGTGACCTTGCGGAGA
GAAGATTTTGATGTGGAAGCAGCTGACTCAGCGGGAAACTGCCTTGACAGTTTAGTTTTT
GTTGCAGGAGATCGGCAATTTGGTCCTTACTGTGGTCATGGATTCCCTGGGCCTCTAAAT
ATTGAAACCAAGAGTAATGCTCTTGATATCATCTTCCAAACTGATCTAACAGGGCAAAAA
AAGGGCTGGAAACTTCGCTATCATGGAGATCCAATGCCCTGCCCTAAGGAAGACACTCCC
AATTCTGTTTGGGAGCCTGCGAAGGCAAAATATGTCTTTAGAGATGTGGTGCAGATAACC
TGTCTGGATGGGTTTGAAGTTGTGGAGGGACGTGTTGGTGCAACATCTTTCTATTCGACT
TGTCAAAGCAATGGAAAGTGGAGTAATTCCAAACTGAAATGTCAACCTGTGGACTGTGGC
ATTCCTGAATCCATTGAGAATGGTAAAGTTGAAGACCCAGAGAGCACTTTGTTTGGTTCT
GTCATCCGCTACACTTGTGAGGAGCCATATTACTACATGGAAAATGGAGGAGGTGGGGAG
TATCACTGTGCTGGTAACGGGAGCTGGGTGAATGAGGTGCTGGGCCCGGAGCTGCCGAAA
TGTGTTCCAGTCTGTGGAGTCCCCAGAGAACCCTTTGAAGAAAAACAGAGGATAATTGGA
GGATCCGATGCAGATATTAAAAACTTCCCCTGGCAAGTCTTCTTTGACAACCCATGGGCT
GGTGGAGCGCTCATTAATGAGTACTGGGTGCTGACGGCTGCTCATGTTGTGGAGGGAAAC
AGGGAGCCAACAATGTATGTTGGGTCCACCTCAGTGCAGACCTCACGGCTGGCAAAATCC
AAGATGCTCACTCCTGAGCATGTGTTTATTCATCCGGGATGGAAGCTGCTGGAAGTCCCA
GAAGGACGAACCAATTTTGATAATGACATTGCACTGGTGCGGCTGAAAGACCCAGTGAAA
ATGGGACCCACCGTCTCTCCCATCTGCCTACCAGGCACCTCTTCCGACTACAACCTCATG
GATGGGGACCTGGGACTGATCTCAGGCTGGGGCCGAACAGAGAAGAGAGATCGTGCTGTT
CGCCTCAAGGCGGCAAGGTTACCTGTAGCTCCTTTAAGAAAATGCAAAGAAGTGAAAGTG
GAGAAACCCACAGCAGATGCAGAGGCCTATGTTTTCACTCCTAACATGATCTGTGCTGGA
GGAGAGAAGGGCATGGATAGCTGTAAAGGGGACAGTGGTGGGGCCTTTGCTGTACAGGAT
CCCAATGACAAGACCAAATTCTACGCAGCTGGCCTGGTGTCCTGGGGGCCCCAGTGTGGG
ACCTATGGGCTCTACACACGGGTAAAGAACTATGTTGACTGGATAATGAAGACTATGCAG
GAAAATAGCACCCCCCGTGAGGACTAA
GenBank Gene IDX06596
GeneCard IDNot Available
GenAtlas IDC1S
HGNC IDHGNC:1247
Chromosome Location12
Locus12p13
References
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  2. Tosi M, Duponchel C, Meo T, Julier C: Complete cDNA sequence of human complement Cls and close physical linkage of the homologous genes Cls and Clr. Biochemistry. 1987 Dec 29;26(26):8516-24. 2831944
  3. Kusumoto H, Hirosawa S, Salier JP, Hagen FS, Kurachi K: Human genes for complement components C1r and C1s in a close tail-to-tail arrangement. Proc Natl Acad Sci U S A. 1988 Oct;85(19):7307-11. 2459702
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  7. Spycher SE, Nick H, Rickli EE: Human complement component C1s. Partial sequence determination of the heavy chain and identification of the peptide bond cleaved during activation. Eur J Biochem. 1986 Apr 1;156(1):49-57. 3007145
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  9. Thielens NM, Van Dorsselaer A, Gagnon J, Arlaud GJ: Chemical and functional characterization of a fragment of C1-s containing the epidermal growth factor homology region. Biochemistry. 1990 Apr 10;29(14):3570-8. 2141278
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