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SummaryStructural detailsExperimental detailsFunctional detailsSequence NeighborHistoryDownloads

9U61

CP/MBL pathways C3 convertase C4b2a and C3 complex

Functional Information from PROSITE/UniProt
site_idPS00134
Number of Residues6
DetailsTRYPSIN_HIS Serine proteases, trypsin family, histidine active site. LTAAHC
ChainResidueDetails
BLEU503-CYS508
site_idPS00135
Number of Residues12
DetailsTRYPSIN_SER Serine proteases, trypsin family, serine active site. SPckGESGGAVF
ChainResidueDetails
BSER673-PHE684
site_idPS00477
Number of Residues9
DetailsALPHA_2_MACROGLOBULIN Alpha-2-macroglobulin family thiolester region signature. PsGCGEQnM
ChainResidueDetails
DPRO1007-MET1015
EPRO1007-MET1015
site_idPS01177
Number of Residues36
DetailsANAPHYLATOXIN_1 Anaphylatoxin domain signature. CCedGmrenpmrfSCQrrtrfisl.GeaCkkvfld.CC
ChainResidueDetails
DCYS693-CYS728
ECYS702-CYS736
Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues198
DetailsDomain: {"description":"VWFA","evidences":[{"source":"PROSITE-ProRule","id":"PRU00219","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails
site_idSWS_FT_FI2
Number of Residues280
DetailsDomain: {"description":"Peptidase S1","evidences":[{"source":"PROSITE-ProRule","id":"PRU00274","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails
site_idSWS_FT_FI3
Number of Residues4
DetailsMotif: {"description":"MIDAS-like motif","evidences":[{"source":"PubMed","id":"17027507","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails
site_idSWS_FT_FI4
Number of Residues3
DetailsActive site: {"description":"Charge relay system","evidences":[{"source":"PubMed","id":"17027507","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails
site_idSWS_FT_FI5
Number of Residues3
DetailsBinding site: {"evidences":[{"source":"PubMed","id":"17027507","evidenceCode":"ECO:0000269"},{"source":"PDB","id":"2I6Q","evidenceCode":"ECO:0007744"}]}
ChainResidueDetails
site_idSWS_FT_FI6
Number of Residues2
DetailsGlycosylation: {"description":"N-linked (GlcNAc...) asparagine","evidences":[{"evidenceCode":"ECO:0000255"}]}
ChainResidueDetails
site_idSWS_FT_FI7
Number of Residues1
DetailsGlycosylation: {"description":"N-linked (GlcNAc...) asparagine","evidences":[{"source":"PubMed","id":"16335952","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"17027507","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"19159218","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails
site_idSWS_FT_FI8
Number of Residues2
DetailsGlycosylation: {"description":"N-linked (GlcNAc...) asparagine","evidences":[{"source":"PubMed","id":"16335952","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"17027507","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails
site_idSWS_FT_FI9
Number of Residues2
DetailsGlycosylation: {"description":"N-linked (GlcNAc...) asparagine","evidences":[{"source":"PubMed","id":"16335952","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails
site_idSWS_FT_FI10
Number of Residues1
DetailsGlycosylation: {"description":"N-linked (GlcNAc...) (complex) asparagine","evidences":[{"source":"PubMed","id":"16335952","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"17234210","evidenceCode":"ECO:0000269"},{"source":"PDB","id":"2ODQ","evidenceCode":"ECO:0007744"}]}
ChainResidueDetails
site_idSWS_FT_FI11
Number of Residues16
DetailsPeptide: {"description":"Complement C3f fragment","featureId":"PRO_0000005916","evidences":[{"source":"PubMed","id":"8376604","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails
site_idSWS_FT_FI12
Number of Residues35
DetailsDomain: {"description":"Anaphylatoxin-like","evidences":[{"source":"PROSITE-ProRule","id":"PRU00022","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails
site_idSWS_FT_FI13
Number of Residues290
DetailsDomain: {"description":"NTR","evidences":[{"source":"PROSITE-ProRule","id":"PRU00295","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails
site_idSWS_FT_FI14
Number of Residues19
DetailsRegion: {"description":"Disordered","evidences":[{"source":"SAM","id":"MobiDB-lite","evidenceCode":"ECO:0000256"}]}
ChainResidueDetails
site_idSWS_FT_FI15
Number of Residues25
DetailsRegion: {"description":"Interaction with CFP/properdin","evidences":[{"source":"PubMed","id":"28264884","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"31507604","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails
site_idSWS_FT_FI16
Number of Residues1
DetailsSite: {"description":"(Microbial infection) Cleavage; by N.meningitidis NalP","evidences":[{"source":"PubMed","id":"24367091","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails
site_idSWS_FT_FI17
Number of Residues1
DetailsSite: {"description":"Cleavage; by carboxypeptidases","evidences":[{"source":"PubMed","id":"4098172","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"6968751","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails
site_idSWS_FT_FI18
Number of Residues1
DetailsSite: {"description":"Cleavage; by C3 convertase","evidences":[{"source":"PubMed","id":"16177781","evidenceCode":"ECO:0000305"}]}
ChainResidueDetails
site_idSWS_FT_FI19
Number of Residues3
DetailsSite: {"description":"Cleavage; by factor I","evidences":[{"source":"PubMed","id":"28671664","evidenceCode":"ECO:0000305"}]}
ChainResidueDetails
site_idSWS_FT_FI20
Number of Residues1
DetailsSite: {"description":"Coordinates Mg(2+) for interaction with Complement factor B Bb fragment (CFB)","evidences":[{"source":"PubMed","id":"28264884","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"31507604","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails
site_idSWS_FT_FI21
Number of Residues8
DetailsModified residue: {"description":"Phosphoserine; by FAM20C","evidences":[{"source":"PubMed","id":"26091039","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails
site_idSWS_FT_FI22
Number of Residues1
DetailsGlycosylation: {"description":"N-linked (GlcNAc...) asparagine","evidences":[{"source":"PubMed","id":"14760718","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"16335952","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"17051150","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails
site_idSWS_FT_FI23
Number of Residues2
DetailsCross-link: {"description":"Isoglutamyl cysteine thioester (Cys-Gln)","evidences":[{"source":"PubMed","id":"1577777","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"6175959","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails
site_idSWS_FT_FI24
Number of Residues1
DetailsSite: {"description":"(Microbial infection) Cleavage; by S.pyogenes SpeB","evidences":[{"source":"PubMed","id":"18160402","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails
site_idSWS_FT_FI25
Number of Residues1
DetailsGlycosylation: {"description":"N-linked (GlcNAc...) asparagine","evidences":[{"source":"PubMed","id":"12754519","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"16263699","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"16335952","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"17051150","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"17684013","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"19159218","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"2579379","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails
site_idSWS_FT_FI26
Number of Residues1
DetailsSite: {"description":"Responsible for effective binding to form amide bonds with immune aggregates or protein antigens","evidences":[{"source":"PubMed","id":"8538770","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails
site_idSWS_FT_FI27
Number of Residues1
DetailsModified residue: {"description":"Phosphoserine","evidences":[{"source":"UniProtKB","id":"P0C0L4","evidenceCode":"ECO:0000250"}]}
ChainResidueDetails
site_idSWS_FT_FI28
Number of Residues1
DetailsGlycosylation: {"description":"N-linked (GlcNAc...) asparagine","evidences":[{"source":"PubMed","id":"12754519","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails
site_idSWS_FT_FI29
Number of Residues1
DetailsGlycosylation: {"description":"N-linked (GlcNAc...) asparagine","evidences":[{"source":"PubMed","id":"16740002","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails
site_idSWS_FT_FI30
Number of Residues1
DetailsGlycosylation: {"description":"N-linked (GlcNAc...) asparagine","evidences":[{"source":"PubMed","id":"14760718","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails
site_idSWS_FT_FI31
Number of Residues2
DetailsCross-link: {"description":"Isoglutamyl cysteine thioester (Cys-Gln)"}
ChainResidueDetails

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PDB entries from 2026-01-28

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