1PXV

The staphostatin-staphopain complex: a forward binding inhibitor in complex with its target cysteine protease

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1pxva1	Alpha and beta proteins (a+b)	Cysteine proteinases	Cysteine proteinases	Papain-like	Staphopain SspB	(Staphylococcus aureus ) [TaxId: 1280 ],	SCOPe (2.08)
A	d1pxva2	Artifacts	Tags	Tags	Tags	N-terminal Tags	(Staphylococcus aureus ) [TaxId: 1280 ],	SCOPe (2.08)
B	d1pxvb1	Alpha and beta proteins (a+b)	Cysteine proteinases	Cysteine proteinases	Papain-like	Staphopain SspB	(Staphylococcus aureus ) [TaxId: 1280 ],	SCOPe (2.08)
B	d1pxvb2	Artifacts	Tags	Tags	Tags	N-terminal Tags	(Staphylococcus aureus ) [TaxId: 1280 ],	SCOPe (2.08)
C	d1pxvc1	All beta proteins	Streptavidin-like	beta-Barrel protease inhibitors	Staphostatin	Staphostatin B (SspC)	(Staphylococcus aureus ) [TaxId: 1280 ],	SCOPe (2.08)
C	d1pxvc2	Artifacts	Tags	Tags	Tags	N-terminal Tags	(Staphylococcus aureus ) [TaxId: 1280 ],	SCOPe (2.08)
D	d1pxvd1	All beta proteins	Streptavidin-like	beta-Barrel protease inhibitors	Staphostatin	Staphostatin B (SspC)	(Staphylococcus aureus ) [TaxId: 1280 ],	SCOPe (2.08)
D	d1pxvd2	Artifacts	Tags	Tags	Tags	N-terminal Tags	(Staphylococcus aureus ) [TaxId: 1280 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Cysteine proteinases	8034081	3001808	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Cysteine proteinases	8034081	3001808	SCOP2B (2022-06-29)
C	SCOP2 Family	Staphostatin	8101734	4000917	SCOP2 (2022-06-29)
C	SCOP2 Superfamily	beta-Barrel protease inhibitors	8101735	3001476	SCOP2 (2022-06-29)
D	SCOP2B Superfamily	beta-Barrel protease inhibitors	8101735	3001476	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Peptidase_C47	e1pxvA1	A: a+b complex topology	X: Cysteine proteinases-like	H: Cysteine proteinases (From Topology)	T: Cysteine proteinases	F: Peptidase_C47	ECOD (1.6)
B	Peptidase_C47	e1pxvB1	A: a+b complex topology	X: Cysteine proteinases-like	H: Cysteine proteinases (From Topology)	T: Cysteine proteinases	F: Peptidase_C47	ECOD (1.6)
C	Staphostatin_B	e1pxvC1	A: beta barrels	X: Lipocalins/Streptavidin	H: Staphostatin (From Topology)	T: Staphostatin	F: Staphostatin_B	ECOD (1.6)
D	Staphostatin_B	e1pxvD1	A: beta barrels	X: Lipocalins/Streptavidin	H: Staphostatin (From Topology)	T: Staphostatin	F: Staphostatin_B	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.90.70.10	Alpha Beta	Alpha-Beta Complex	Cathepsin B	Chain A	CATH (4.3.0)
B	3.90.70.10	Alpha Beta	Alpha-Beta Complex	Cathepsin B	Chain A	CATH (4.3.0)
C	2.40.310.10	Mainly Beta	Beta Barrel	Staphostatins	beta-Barrel protease inhibitors	CATH (4.3.0)
D	2.40.310.10	Mainly Beta	Beta Barrel	Staphostatins	beta-Barrel protease inhibitors	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF05543	Staphopain peptidase C47 (Peptidase_C47)	Staphopain peptidase C47	-	Family
C, D	PF09023	Staphostatin B (Staphostatin_B)	Staphostatin B	Staphostatin B inhibits the cysteine protease Staphopain B, produced by Staphylococcus aureus, by blocking the active site of the enzyme. The domain adopts an eight-stranded mixed beta-barrel structure, with a deviation from the up-down topology of c ...	Staphostatin B inhibits the cysteine protease Staphopain B, produced by Staphylococcus aureus, by blocking the active site of the enzyme. The domain adopts an eight-stranded mixed beta-barrel structure, with a deviation from the up-down topology of canonical beta-barrels in the amino-terminal part of the molecule [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	cysteine protease	cysteine-type peptidase activity peptidase activity catalytic activity, acting on a protein hydrolase activity catalytic activity	proteolysis metabolic process cellular process primary metabolic process protein metabolic process macromolecule metabolic process	cellular anatomical structure extracellular region
C, D	cysteine protease Inhibitor	enzyme regulator activity molecular function inhibitor activity peptidase regulator activity molecular function regulator activity enzyme inhibitor activity cysteine-type endopeptidase inhibitor activity peptidase inhibitor activity endopeptidase regulator activity endopeptidase inhibitor activity	negative regulation of hydrolase activity negative regulation of proteolysis regulation of cellular process regulation of catalytic activity negative regulation of biological process negative regulation of catalytic activity regulation of primary metabolic process negative regulation of peptidase activity regulation of proteolysis proteolysis negative regulation of cellular process protein metabolic process negative regulation of protein metabolic process negative regulation of macromolecule metabolic process negative regulation of hydrolase activity negative regulation of proteolysis regulation of cellular process regulation of catalytic activity negative regulation of biological process negative regulation of catalytic activity regulation of primary metabolic process negative regulation of peptidase activity regulation of proteolysis proteolysis negative regulation of cellular process protein metabolic process negative regulation of protein metabolic process negative regulation of macromolecule metabolic process regulation of biological process regulation of protein metabolic process negative regulation of metabolic process biological regulation negative regulation of molecular function regulation of peptidase activity primary metabolic process regulation of macromolecule metabolic process regulation of molecular function regulation of hydrolase activity metabolic process cellular process macromolecule metabolic process regulation of metabolic process	cellular anatomical structure intracellular anatomical structure cytoplasm

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR038765	Papain-like cysteine peptidase superfamily	Homologous Superfamily
A, B	IPR028076	Staphopain proregion	Domain
A, B	IPR025660	Cysteine peptidase, histidine active site	Active Site
A, B	IPR037155	Staphopain proregion superfamily	Homologous Superfamily
A, B	IPR008750	Staphopain peptidase C47	Family
A, B	IPR046350	Cystatin superfamily	Homologous Superfamily
C, D	IPR016085	Protease inhibitor, beta-barrel domain	Homologous Superfamily
C, D	IPR015113	Staphostatin B	Domain
C, D	IPR037296	Staphostatin A/B	Homologous Superfamily

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.