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3NPS

Crystal structure of membrane-type serine protease 1 (MT-SP1) in complex with the Fab Inhibitor S4

Entity
Entity IDChain IDDescriptionTypeChain lengthFormula weightNumber of moleculesDB Name (Accession)Biological sourceDescriptive keywords
1A
(A)
Suppressor of tumorigenicity 14 proteinpolymer24126447.71UniProt (Q9Y5Y6)
Pfam (PF00089)
Homo sapiens (human)Serine protease 14, Matriptase, Membrane-type serine protease 1, MT-SP1, Prostamin, Serine protease TADG-15, Tumor-associated differentially-expressed gene 15 protein
2B
(B)
S4 FAB HEAVY CHAINpolymer22624134.11Homo sapiens (human)
3C
(C)
S4 FAB LIGHT CHAINpolymer21122731.11Homo sapiens (human)
4D, E, F, G, H...
(A, B, C)
1,2-ETHANEDIOLnon-polymer62.110Chemie (EDO)
5J, K, P, Q, S
(A, B, C)
SODIUM IONnon-polymer23.05Chemie (NA)
6L
(A)
CHLORIDE IONnon-polymer35.51Chemie (CL)
7T, U, V
(A, B, C)
waterwater18.0676Chemie (HOH)
Sequence modifications
A: 16 - 244 (UniProt: Q9Y5Y6)
PDBExternal DatabaseDetails
Ser 122Cys 731engineered mutation
Sequence viewer
Contents of the asymmetric unit
PolymersNumber of chains3
Total formula weight73312.8
Non-Polymers*Number of molecules16
Total formula weight771.1
All*Total formula weight74083.9
*Water molecules are not included.

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PDB entries from 2025-06-18

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