3BX1

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
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	d3bx1a_	Alpha and beta proteins (a/b)	Subtilisin-like	Subtilisin-like	Subtilases	automated matches	( ) [TaxId: ], (Lederbergia lenta ) [TaxId: 1467 ],	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)
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)
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)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Subtilisin-like	8044328	3000226	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Subtilisin-like	8044328	3000226	SCOP2B (2022-06-29)
C [auth D]	SCOP2B Superfamily	STI-like	8039577	3000715	SCOP2B (2022-06-29)
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)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
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)
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)
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)
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)

Domain Annotation: CATH CATH Database Homepage

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

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF00082	Subtilase family (Peptidase_S8)	Subtilase family	Subtilases are a family of serine proteases. They appear to have independently and convergently evolved an Asp/Ser/His catalytic triad, like that found in the trypsin serine proteases (see Pfam:PF00089). Structure is an alpha/beta fold containing a 7 ...	Subtilases are a family of serine proteases. They appear to have independently and convergently evolved an Asp/Ser/His catalytic triad, like that found in the trypsin serine proteases (see Pfam:PF00089). Structure is an alpha/beta fold containing a 7-stranded parallel beta sheet, order 2314567.	Domain
C [auth D], D [auth C]	PF00197	Trypsin and protease inhibitor (Kunitz_legume)	Trypsin and protease inhibitor		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
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
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	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
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
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

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.