Structure of PDB 1o3c Chain A Binding Site BS02

Receptor Information
>1o3c Chain A (length=223) Species: 9913 (Bos taurus) [Search protein sequence] [Download receptor structure] [Download structure with residue number starting from 1] [View receptor structure]
IVGGYTCGANTVPYQVSLNSGYHFCGGSLINSQWVVSAAHCYKSGIQVRL
GEDNINVVEGNEQFISASKSIVHPSYNSNTLNNDIMLIKLKSAASLNSRV
ASISLPTSCASAGTQCLISGWGNTKSSGTSYPDVLKCLKAPILSDSSCKS
AYPGQITSNMFCAGYLEGGKDSCQGDSGGPVVCSGKLQGIVSWGSGCAQK
NKPGVYTKVCNYVSWIKQTIASN
Ligand information
Ligand ID780
InChIInChI=1S/C20H16N4O/c21-19(22)13-9-10-16-17(11-13)24-20(23-16)15-8-4-7-14(18(15)25)12-5-2-1-3-6-12/h1-11,25H,(H3,21,22)(H,23,24)
InChIKeyLMGQGPVCSYOMNS-UHFFFAOYSA-N
SMILES
SoftwareSMILES
CACTVS 3.341NC(=[NH2+])c1ccc2[nH]c(nc2c1)c3cccc(c3[O-])c4ccccc4
OpenEye OEToolkits 1.5.0c1ccc(cc1)c2cccc(c2[O-])c3[nH]c4ccc(cc4n3)C(=[NH2+])N
ACDLabs 10.04[O-]c4c(c1ccccc1)cccc4c3nc2cc(ccc2n3)\C(=[NH2+])N
FormulaC20 H16 N4 O
Name3-{5-[AMINO(IMINIO)METHYL]-1H-BENZIMIDAZOL-2-YL}-1,1'-BIPHENYL-2-OLATE;
CRA_7806
ChEMBLCHEMBL327715
DrugBankDB01725
ZINCZINC000002047577
PDB chain1o3c Chain A Residue 246 [Download ligand structure] [Download structure with residue number starting from 1] [View ligand structure]
Receptor-Ligand Complex Structure
Global viewLocal viewStructure summary

[Spin on] [Spin off] [Reset]
[High quality] [Low quality]
[White background] [Black background]
[Spin on] [Spin off] [Reset]
[High quality] [Low quality]
[White background] [Black background]
PDB1o3c Elaborate manifold of short hydrogen bond arrays mediating binding of active site-directed serine protease inhibitors.
Resolution1.64 Å
Binding residue
(original residue number in PDB)		H57 D189 S190 C191 Q192 S195 V213
Binding residue
(residue number reindexed from 1)		H40 D171 S172 C173 Q174 S177 V191
Annotation score1
Binding affinityPDBbind-CN: -logKd/Ki=7.13,Ki=0.074uM
Enzymatic activity
Catalytic site (original residue number in PDB) H57 D102 Q192 G193 D194 S195 G196
Catalytic site (residue number reindexed from 1) H40 D84 Q174 G175 D176 S177 G178
Enzyme Commision number 3.4.21.4: trypsin.
Gene Ontology
Molecular Function
GO:0004175 endopeptidase activity
GO:0004252 serine-type endopeptidase activity
GO:0005515 protein binding
GO:0008236 serine-type peptidase activity
GO:0046872 metal ion binding
GO:0097655 serpin family protein binding
Biological Process
GO:0006508 proteolysis
GO:0007586 digestion
Cellular Component
GO:0005576 extracellular region
GO:0005615 extracellular space
GO:0097180 serine protease inhibitor complex

View graph for
Molecular Function
View graph for
Biological Process
View graph for
Cellular Component
External links
PDB RCSB:1o3c, PDBe:1o3c, PDBj:1o3c
PDBsum1o3c
PubMed12742021
UniProtP00760|TRY1_BOVIN Serine protease 1 (Gene Name=PRSS1)

[Back to BioLiP]