P09871 (C1S_HUMAN) Homo sapiens (Human)

Complement C1s subcomponent UniProtKBInterProSTRINGInteractive Modelling

688 aa; Sequence (Fasta)

Molecule Processing
Complement C1s subcomponent heavy chain
Complement C1s subcomponent light chain

Sequence Features

Add
 475Charge relay system
 529Charge relay system
 632Charge relay system
 60Calcium
 68Calcium
 113Calcium
 131Calcium
 132Calcium; via carbonyl oxygen
 134Calcium
 149Calcium
 150Calcium; via carbonyl oxygen
 153Calcium; via carbonyl oxygen
 119R -> H (in dbSNP:rs12146727) VAR_033643 dbSNP
 294C -> R (in EDSPD2; dbSNP:rs886040975) VAR_077120 dbSNP
 316Missing (in EDSPD2; unknown pathological significance) VAR_077121
 327V -> L (in dbSNP:rs2239170) VAR_033644 dbSNP
 383R -> H (in dbSNP:rs20573) VAR_014565 dbSNP
 65-83
 135-147
 143-156
 158-171
 175-202
 234-251
 294-341
 321-354
 359-403
 386-421
 425-549Interchain (between heavy and light chains)
 595-618
 628-659
 19-127CUB domain
IPR000859PF00431
 175-287CUB domain
IPR000859PF00431
 294-354Sushi/SCR/CCP domain
IPR000436PF00084
 359-413Sushi/SCR/CCP domain
IPR000436PF00084
 438-675Serine proteases, trypsin domain
IPR001254PF00089

Sequence Alignments

Experimental structures

DescriptionOligo-stateLigandsStructureRange
Crystal structure of human C1s in complex with inhibitor gigastasin Heteromer
NAG;5ubm288-685
Assess
C1rC1s complex Heteromer
P00736;
NAG;NAG;NAG; 12×CA;NA;NAG;6f1c16-292
Assess
C1s CUB1-EGF-CUB2 in complex with a collagen-like peptide from C1q Heteromer
CA;NA;NAG;4lor17-292
Assess
C1rC1s complex Heteromer
P00736;
NAG;NAG;CA;NA;NAG;6f1h17-292
Assess
Crystal Structure of the CUB1-EGF Interaction Domain of Complement Protease C1shomo-2-mer CA;MG;1nzi16-174
Assess
The X-ray crystal structure of human complement protease C1s zymogenmonomer 4j1y292-684
Assess
CRYSTAL STRUCTURE OF THE CATALYTIC DOMAIN OF HUMAN COMPLEMENT C1S PROTEASEmonomer NAG;SO4;NES;1elv358-683
Assess
C1s CUB1-EGF-CUB2monomer NA;CA;4lmf17-292
Assess
C1s CUB2-CCP1-CCP2monomer 4lot175-423
Assess
C1s CUB2-CCP1monomer CA;4los172-358
Assess