eF-site ID 2a73-B PDB Code 2a73 Chain B click to enlarge Title Human Complement Component C3 Classification IMMUNE SYSTEM Compound Complement C3 Source ORGANISM_COMMON: human; ORGANISM_SCIENTIFIC: Homo sapiens; Sequence B:  VQLTEKRMDKVGKYPKELRKCCEDGMRENPMRFSCQRRTR FISLGEACKKVFLDCCNYITELRRQHARALDEDIIAEENI VSRSEFPESWLWNVEDLKEPPKNGISTKLMNIFLKDSITT WEILAVSMSDKKGICVADPFEVTVMQDFFIDLRLPYSVVR NEQVEIRAVLYNYRQNQELKVRVELLHNPAFCSLATTKRR HQQTVTIPPKSSLSVPYVIVPLKTGLQEVEVKAAVYHHFI SDGVRKSLKVVPEGIRMNKTVAVRTLDPERLGREGVQKED IPPADLSDQVPDTESETRILLQGTPVAQMTEDAVDAERLK HLIVTPSGCGEQNMIGMTPTVIAVHYLDETEQWEKFGLEK RQGALELIKKGYTQQLAFRQPSSAFAAFVKRAPSTWLTAY VVKVFSLAVNLIAIDSQVLCGAVKWLILEKQKPDGVFQED APVIHQENNNEKDMALTAFVLISLQEAKDICEEQVNSLPG SITKAGDFLEANYMNLQRSYTVAIAGYALAQMGRLKGPLL NKFLTTAKDKNRWEDPGKQLYNVEATSYALLALLQLKDFD FVPPVVRWLNEQRYYGGGYGSTQATFMVFQALAQYQKDAP DHQELNLDVSLQLPSRSSKITHRIHWESASLLRSEETKEN EGFTVTAEGKGQGTLSVVTMYHAKAKDQLTCNKFDLKVTI KPAPETEKRPQDAKNTMILEICTRYRGDQDATMSILDISM MTGFAPDTDDLKQLANGVDRYISKYELDKAFSDRNTLIIY LDKVSHSEDDCLAFKVHQYFNVELIQPGAVKVYAYYNLEE SCTRFYHPEKEDGKLNKLCRDELCRCAEENCFIQKSDDKV TLEERLDKACEPGVDYVYKTRLVKVQLSNDFDEYIMAIEQ TIKSGSDEVQVGQQRTFISPIKCREALKLEEKKHYLMWGL SSDFWGEKPNLSYIIGKDTWVEHWPEEDECQDEENQKQCQ DLGAFTESMVVFGCPN Description Functional site 1) chain B residue 1595 type CARBOHYD sequence N description N-linked (GlcNAc...) asparagine => ECO:0000269|PubMed:16335952 source Swiss-Prot : SWS_FT_FI8 2) chain B residue 988 type CROSSLNK sequence C description Isoglutamyl cysteine thioester (Cys-Gln) source Swiss-Prot : SWS_FT_FI9 3) chain B residue 991 type CROSSLNK sequence Q description Isoglutamyl cysteine thioester (Cys-Gln) source Swiss-Prot : SWS_FT_FI9 4) chain B residue 932 type SITE sequence R description Cleavage; by factor I => ECO:0000255 source Swiss-Prot : SWS_FT_FI3 5) chain B residue 1298 type SITE sequence R description Cleavage; by factor I source Swiss-Prot : SWS_FT_FI4 6) chain B residue 1281 type SITE sequence R description Cleavage; by factor I source Swiss-Prot : SWS_FT_FI4 7) chain B residue 1641 type SITE sequence N description Coordinates Mg2+ for interaction with Complement factor B Bb fragment => ECO:0000269|PubMed:28264884, ECO:0000269|PubMed:31507604 source Swiss-Prot : SWS_FT_FI5 8) chain B residue 1551 type MOD_RES sequence S description Phosphoserine; by FAM20C => ECO:0000269|PubMed:26091039 source Swiss-Prot : SWS_FT_FI6 9) chain B residue 946 type MOD_RES sequence S description Phosphoserine; by FAM20C => ECO:0000269|PubMed:26091039 source Swiss-Prot : SWS_FT_FI6 10) chain B residue 1299 type MOD_RES sequence S description Phosphoserine; by FAM20C => ECO:0000269|PubMed:26091039 source Swiss-Prot : SWS_FT_FI6 11) chain B residue 917 type CARBOHYD sequence N description N-linked (GlcNAc...) asparagine => ECO:0000269|PubMed:14760718, ECO:0000269|PubMed:16335952, ECO:0000269|PubMed:17051150 source Swiss-Prot : SWS_FT_FI7 12) chain B residue 985-993 type prosite sequence PSGCGEQNM description ALPHA_2_MACROGLOBULIN Alpha-2-macroglobulin family thiolester region signature. PsGCGEQnM source prosite : PS00477 13) chain B residue 671-706 type prosite sequence CCEDGMRENPMRFSCQRRTRFISLGEACKKVFLDCC description ANAPHYLATOXIN_1 Anaphylatoxin domain signature. CCedGmrenpmrfSCQrrtrfisl.GeaCkkvfld.CC source prosite : PS01177

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