1BUN	Toxin	date	Oct 15, 1995
title	Structure Of Beta2-Bungarotoxin: Potassium Channel Binding By Kunitz Modules And Targeted Phospholipase Action
authors	P.D.Kwong, N.Q.Mcdonald, P.B.Sigler, W.A.Hendrickson
compound		source
Molecule: Beta2-Bungarotoxin Chain: A Synonym: Phosphatide Acyl-Hydrolase, Phosphatidylcholine 2- Acylhydrolase; Ec: 3.1.1.4 Other_details: Numerous Natural Isoforms, This Is The Beta2 Isoform;		Organism_scientific: Bungarus Multicinctus Organism_common: Many-Banded Krait Organism_taxid: 8616 Tissue: Venom
Molecule: Beta2-Bungarotoxin Chain: B Synonym: Phosphatide Acyl-Hydrolase, Phosphatidylcholine 2- Acylhydrolase; Ec: 3.1.1.4 Other_details: Numerous Natural Isoforms, This Is The Beta2 Isoform		Organism_scientific: Bungarus Multicinctus Organism_common: Many-Banded Krait Organism_taxid: 8616 Tissue: Venom
symmetry	Space Group: P 43 2 2	R_factor 0.193 R_Free 0.281
crystal cell	length a length b length c angle alpha angle beta angle gamma 52.600 52.600 177.500 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	2.45 Å
ligand	NA	enzyme	Hydrolase E.C.3.1.1.4 BRENDA
Gene Ontology	Chain Function Process Component A toxin activity B serine-type endopeptidase in... toxin activity
Primary reference	Structure of beta 2-bungarotoxin: potassium channel binding by Kunitz modules and targeted phospholipase action., Kwong PD, McDonald NQ, Sigler PB, Hendrickson WA, Structure 1995 Oct 15;3(10):1109-19. PMID:8590005

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (35 Kb) [Save to disk] Biological Unit Coordinates (1bun.pdb1.gz) 32 Kb LPC: Ligand-Protein Contacts for 1BUN CSU: Contacts of Structural Units for 1BUN Likely Quarternary Molecular Structure file(s) for 1BUN Retrieve 1BUN in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1BUN from S2C, [Save to disk]

View 1BUN in 3D

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Visual 3D analysis of 1BUN

Ramachandran plot from PDBSum

Structure-derived information

Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 1BUN, from MSDmotif at EBI Genome occurence of 1BUN's fold from GeneCensus Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1buna_, region A [Jmol] [rasmolscript] [script source]     - Domain d1bunb_, region B [Jmol] [rasmolscript] [script source] Class (fold), Architecture (subfold), Topology, Homologous superfamily from CATH Summaries and structural analyses of PDB data files from PDBSum Identification of Protein Pockets & Cavities at CASTp

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [1bun] [1bun_A] [1bun_B] SWISS-PROT database: [P00989] [P00617] Domain organization of [IVBI2_BUNMU] [PA21B_BUNMU] by SWISSPFAM Domains found in 1BUN: [KU] [PA2c ] by SMART

Other resources with information on 1BUN

Community annotation for 1BUN at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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