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4IW4

Crystal structure of the serine protease domain of MASP-3 in complex with ecotin

Functional Information from GO Data
ChainGOidnamespacecontents
C0004867molecular_functionserine-type endopeptidase inhibitor activity
C0005515molecular_functionprotein binding
C0006952biological_processdefense response
C0030288cellular_componentouter membrane-bounded periplasmic space
C0030414molecular_functionpeptidase inhibitor activity
C0042597cellular_componentperiplasmic space
C0042803molecular_functionprotein homodimerization activity
D0004867molecular_functionserine-type endopeptidase inhibitor activity
D0005515molecular_functionprotein binding
D0006952biological_processdefense response
D0030288cellular_componentouter membrane-bounded periplasmic space
D0030414molecular_functionpeptidase inhibitor activity
D0042597cellular_componentperiplasmic space
D0042803molecular_functionprotein homodimerization activity
E0004252molecular_functionserine-type endopeptidase activity
E0006508biological_processproteolysis
F0004252molecular_functionserine-type endopeptidase activity
F0006508biological_processproteolysis
Functional Information from PROSITE/UniProt
site_idPS00135
Number of Residues12
DetailsTRYPSIN_SER Serine proteases, trypsin family, serine active site. DTclGDSGGAFV
ChainResidueDetails
EASP639-VAL650

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues2
DetailsSite: {"description":"Reactive bond"}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues6
DetailsActive site: {"description":"Charge relay system","evidences":[{"evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues4
DetailsGlycosylation: {"description":"N-linked (GlcNAc) asparagine","evidences":[{"source":"PubMed","id":"16335952","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

247536

PDB entries from 2026-01-14

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