1XTG	Toxin	date	Oct 21, 2004
title	Crystal Structure Of Neurotoxin Bonta Complexed With Synapt Associated Protein 25
authors	M.A.Breidenbach, A.T.Brunger
compound		source
Molecule: Neurotoxin Bonta Chain: A Fragment: Light Chain Engineered: Yes Mutation: Yes		Organism_scientific: Clostridium Botulinum Organism_taxid: 1491 Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_strain: M15[Prep4] Expression_system_vector_type: Plasmid Expression_system_plasmid: Pbn3
Molecule: Synaptosomal-Associated Protein 25 Chain: B Fragment: N2 Domain Synonym: Snap-25, Super Protein, Sup Engineered: Yes		Organism_scientific: Homo Sapiens Organism_common: Human Organism_taxid: 9606 Gene: Snap25, Snap Expression_system: Escherichia Coli Bl21(De3) Expression_system_taxid: 469008 Expression_system_strain: Bl21 De3 Expression_system_vector_type: Plasmid Expression_system_plasmid: Pet-28a
symmetry	Space Group: P 43 21 2	R_factor 0.218 R_Free 0.247
crystal cell	length a length b length c angle alpha angle beta angle gamma 86.000 86.000 165.400 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	2.10 Å
ligand	CL, ZN	enzyme
related structures	by homologous chain: 1E1H, 1KIL, 1URQ, 1XTF
Gene Ontology	Chain Function Process Component A B
Primary reference	Substrate recognition strategy for botulinum neurotoxin serotype A., Breidenbach MA, Brunger AT, Nature 2004 Dec 16;432(7019):925-9. Epub 2004 Dec 12. PMID:15592454

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (91 Kb) [Save to disk] Biological Unit Coordinates (1xtg.pdb1.gz) 86 Kb LPC: Ligand-Protein Contacts for 1XTG CSU: Contacts of Structural Units for 1XTG Likely Quarternary Molecular Structure file(s) for 1XTG Structure Factors (618 Kb) Retrieve 1XTG in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1XTG from S2C, [Save to disk] Re-refined 1xtg structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 1XTG in 3D

Proteopedia, because life has more than 2D. On Jmol, a nice Rasmol like molecule viewer. This is good for easiest viewing of basic structure. On FirstGlance, an excellent tool for a guided tour on the structure components, by E. Martz.

Visual 3D analysis of 1XTG

Ramachandran plot from PDBSum

Structure-derived information

Electron Density related parameters from EDS Electron Density Server, at Upsala Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 1XTG, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1xtga_, region A [Jmol] [rasmolscript] [script source]     - Domain d1xtgb_, region B [Jmol] [rasmolscript] [script source]

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [1xtg_A] [1xtg_B] [1xtg] SWISS-PROT database: [A5HZZ9] [P60880] Belongs to the synaptosomal vesicle fusion pore (svf-pore) family according to TCDB. Domain organization of [BXA1_CLOBH] [SNP25_HUMAN] by SWISSPFAM Domain found in 1XTG: [t_SNARE ] by SMART

Other resources with information on 1XTG

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

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