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
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 Diffractionresolution 2.10 Å
ligand CL, ZN enzyme
related structures by homologous chain: 1E1H, 1KIL, 1URQ, 1XTF


Primary referenceSubstrate 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] (92 Kb) [Save to disk]
  • Biological Unit Coordinates (1xtg.pdb1.gz) 87 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
  • Cartoon representation from PDB Cartoon
  • 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
  • Crystal Contacts, from CryCo 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]
  • Fold representative 1xtg from FSSP and Dali (Families of Structurally Similar Proteins)
  • 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)
  • Movements, Movies and Images
  • Images from IMB Jena Image Library of Biological Macromolecules.

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