3BX1 | pdb_00003bx1

Complex between the Barley alpha-Amylase/Subtilisin Inhibitor and the subtilisin Savinase

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
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)
D [auth C]	d3bx1c_	All beta proteins	beta-Trefoil	STI-like	Kunitz (STI) inhibitors	Amylase/subtilisin inhibitor	Barley (Hordeum vulgare ) [TaxId: 4513 ],	SCOPe (2.08)
C [auth D]	d3bx1d_	All beta proteins	beta-Trefoil	STI-like	Kunitz (STI) inhibitors	Amylase/subtilisin inhibitor	Barley (Hordeum vulgare ) [TaxId: 4513 ],	SCOPe (2.08)
B	d3bx1b_	Alpha and beta proteins (a/b)	Subtilisin-like	Subtilisin-like	Subtilases	automated matches	( ) [TaxId: ], (Lederbergia lenta ) [TaxId: 1467 ],	SCOPe (2.08)
A	d3bx1a_	Alpha and beta proteins (a/b)	Subtilisin-like	Subtilisin-like	Subtilases	automated matches	( ) [TaxId: ], (Lederbergia lenta ) [TaxId: 1467 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
D [auth C]	SCOP2 Family	Kunitz (STI) inhibitors	8027198	4002025	SCOP2 (2022-06-29)
D [auth C]	SCOP2 Superfamily	STI-like	8039577	3000715	SCOP2 (2022-06-29)
C [auth D]	SCOP2B Superfamily	STI-like	8039577	3000715	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Subtilisin-like	8044328	3000226	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Subtilisin-like	8044328	3000226	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)
D [auth C]	Kunitz_legume	e3bx1C1	A: beta duplicates or obligate multimers	X: beta-Trefoil (From Topology)	H: beta-Trefoil (From Topology)	T: beta-Trefoil	F: Kunitz_legume	ECOD (1.6)
C [auth D]	Kunitz_legume	e3bx1D1	A: beta duplicates or obligate multimers	X: beta-Trefoil (From Topology)	H: beta-Trefoil (From Topology)	T: beta-Trefoil	F: Kunitz_legume	ECOD (1.6)
B	Peptidase_S8	e3bx1B1	A: a/b three-layered sandwiches	X: Subtilisin-like	H: Subtilisin-like (From Topology)	T: Subtilisin-like	F: Peptidase_S8	ECOD (1.6)
A	Peptidase_S8	e3bx1A1	A: a/b three-layered sandwiches	X: Subtilisin-like	H: Subtilisin-like (From Topology)	T: Subtilisin-like	F: Peptidase_S8	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
D [auth C]	2.80.10.50	Mainly Beta	Trefoil	Trefoil (Acidic Fibroblast Growth Factor, subunit A)		CATH (4.3.0)
C [auth D]	2.80.10.50	Mainly Beta	Trefoil	Trefoil (Acidic Fibroblast Growth Factor, subunit A)		CATH (4.3.0)
B	3.40.50.200	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Peptidase S8/S53 domain	CATH (4.3.0)
A	3.40.50.200	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Peptidase S8/S53 domain	CATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C [auth D], D [auth C]	Alpha-amylase/subtilisin inhibitor	enzyme regulator activity molecular function inhibitor activity peptidase regulator activity serine-type endopeptidase inhibitor activity molecular function regulator activity enzyme inhibitor activity peptidase inhibitor activity endopeptidase regulator activity endopeptidase inhibitor activity alpha-amylase inhibitor activity	-	-
A, B	Subtilisin Savinase	peptidase activity catalytic activity, acting on a protein serine hydrolase activity serine-type peptidase activity hydrolase activity serine-type endopeptidase activity catalytic activity endopeptidase activity cation binding ion binding binding metal ion binding small molecule binding	sporulation resulting in formation of a cellular spore developmental process anatomical structure morphogenesis anatomical structure formation involved in morphogenesis anatomical structure development sporulation proteolysis metabolic process cellular process primary metabolic process protein metabolic process macromolecule metabolic process	cellular anatomical structure extracellular region

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
C [auth D], D [auth C]	IPR002160	Proteinase inhibitor I3, Kunitz legume	Family
C [auth D], D [auth C]	IPR011065	Kunitz inhibitor STI-like superfamily	Homologous Superfamily
A, B	IPR023828	Peptidase S8, subtilisin, Ser-active site	Active Site
A, B	IPR022398	Peptidase S8, subtilisin, His-active site	Active Site
A, B	IPR000209	Peptidase S8/S53 domain	Domain
A, B	IPR015500	Peptidase S8, subtilisin-related	Family
A, B	IPR036852	Peptidase S8/S53 domain superfamily	Homologous Superfamily
A, B	IPR023827	Peptidase S8, subtilisin, Asp-active site	Active Site
A, B	IPR050131	Subtilisin-like serine protease	Family
A, B	IPR034202	Subtilisin Carlsberg-like catalytic domain	Domain

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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.