1BUN | pdb_00001bun

STRUCTURE OF BETA2-BUNGAROTOXIN: POTASSIUM CHANNEL BINDING BY KUNITZ MODULES AND TARGETED PHOSPHOLIPASE ACTION

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
Membrane Protein Annotation: OPM

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B	d1bunb_	Small proteins	BPTI-like	BPTI-like	Small Kunitz-type inhibitors & BPTI-like toxins	beta2-bungarotoxin, neurotoxin chain	(Bungarus multicinctus ) [TaxId: 8616 ],	SCOPe (2.08)
A	d1buna_	All alpha proteins	Phospholipase A2, PLA2	Phospholipase A2, PLA2	Vertebrate phospholipase A2	Snake phospholipase A2	(Bungarus multicinctus ) [TaxId: 8616 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B	SCOP2 Family	Small Kunitz-type inhibitors & BPTI-like toxins	8026174	4003337	SCOP2 (2022-06-29)
B	SCOP2 Superfamily	BPTI-like	8038553	3000628	SCOP2 (2022-06-29)
A	SCOP2 Family	Vertebrate phospholipase A2	8026682	4001493	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Phospholipase A2, PLA2	8039061	3001690	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)
B	Kunitz_BPTI	e1bunB1	A: few secondary structure elements	X: BPTI-like	H: BPTI-like	T: BPTI-like	F: Kunitz_BPTI	ECOD (v294.1)
A	HIPIP	e1bunA1	A: a/b three-layered sandwiches	X: ETN0001 domain-like	H: ETN0001 domain-like	T: Mss4-like	F: HIPIP	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	4.10.410.10	Few Secondary Structures	Irregular	Factor Xa Inhibitor	Pancreatic trypsin inhibitor Kunitz domain	CATH (4.3.0)
A	1.20.90.10	Mainly Alpha	Up-down Bundle	Phospholipase A2	Phospholipase A2 domain	CATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B	BETA2-BUNGAROTOXIN	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 potassium channel regulator activity channel regulator activity ion channel regulator activity transporter regulator activity toxin activity	-	cellular anatomical structure extracellular region extracellular space
A	BETA2-BUNGAROTOXIN	cation binding ion binding binding calcium ion binding metal ion binding small molecule binding toxin activity phospholipid binding lipid binding	organic anion transport carboxylic acid transport secretion transport arachidonate transport lipid localization lipid transport establishment of localization organic acid transport localization arachidonate secretion monocarboxylic acid transport fatty acid transport icosanoid transport macromolecule localization organic anion transport carboxylic acid transport secretion transport arachidonate transport lipid localization lipid transport establishment of localization organic acid transport localization arachidonate secretion monocarboxylic acid transport fatty acid transport icosanoid transport macromolecule localization icosanoid secretion long-chain fatty acid transport lipid catabolic process catabolic process metabolic process cellular process primary metabolic process lipid metabolic process phospholipid metabolic process organophosphate metabolic process phosphate-containing compound metabolic process phosphorus metabolic process	cellular anatomical structure extracellular region

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B	IPR002223	Pancreatic trypsin inhibitor Kunitz domain	Domain
B	IPR050098	Tissue factor pathway inhibitor/Kunitz-type serine protease inhibitor-like	Family
B	IPR020901	Proteinase inhibitor I2, Kunitz, conserved site	Conserved Site
B	IPR036880	Pancreatic trypsin inhibitor Kunitz domain superfamily	Homologous Superfamily
A	IPR033112	Phospholipase A2, aspartic acid active site	Active Site
A	IPR033113	Phospholipase A2, histidine active site	Active Site
A	IPR016090	Phospholipase A2-like, central domain	Domain
A	IPR001211	Phospholipase A2	Family
A	IPR036444	Phospholipase A2 domain superfamily	Homologous Superfamily

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A, B	OPM	Monotopic/peripheral	All alpha monotopic/peripheral	Secretory phospholipase A2	Vertebrate secretory phospholipase A2

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.

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