3V0B

3.9 angstrom crystal structure of BoNT/Ai in complex with NTNHA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.90 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.252 
  • R-Value Observed: 0.253 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Botulinum neurotoxin is shielded by NTNHA in an interlocked complex.

Gu, S.Rumpel, S.Zhou, J.Strotmeier, J.Bigalke, H.Perry, K.Shoemaker, C.B.Rummel, A.Jin, R.

(2012) Science 335: 977-981

  • DOI: https://doi.org/10.1126/science.1214270
  • Primary Citation of Related Structures:  
    3V0A, 3V0B, 3V0C

  • PubMed Abstract: 

    Botulinum neurotoxins (BoNTs) are highly poisonous substances that are also effective medicines. Accidental BoNT poisoning often occurs through ingestion of Clostridium botulinum-contaminated food. Here, we present the crystal structure of a BoNT in complex with a clostridial nontoxic nonhemagglutinin (NTNHA) protein at 2.7 angstroms. Biochemical and functional studies show that NTNHA provides large and multivalent binding interfaces to protect BoNT from gastrointestinal degradation. Moreover, the structure highlights key residues in BoNT that regulate complex assembly in a pH-dependent manner. Collectively, our findings define the molecular mechanisms by which NTNHA shields BoNT in the hostile gastrointestinal environment and releases it upon entry into the circulation. These results will assist in the design of small molecules for inhibiting oral BoNT intoxication and of delivery vehicles for oral administration of biologics.


  • Organizational Affiliation

    Center for Neuroscience, Aging and Stem Cell Research, Sanford-Burnham Medical Research Institute, 10901 North Torrey Pines Road, La Jolla, CA 92037, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
BoNT/A1,296Clostridium botulinumMutation(s): 3 
Gene Names: bont/aboNT/Abonta
UniProt
Find proteins for P0DPI1 (Clostridium botulinum (strain Hall / ATCC 3502 / NCTC 13319 / Type A))
Explore P0DPI1 
Go to UniProtKB:  P0DPI1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0DPI1
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
NTNH1,196Clostridium botulinumMutation(s): 0 
Gene Names: antntnh
UniProt
Find proteins for Q45914 (Clostridium botulinum)
Explore Q45914 
Go to UniProtKB:  Q45914
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ45914
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.90 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.252 
  • R-Value Observed: 0.253 
  • Space Group: P 62 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 282.232α = 90
b = 282.232β = 90
c = 374.818γ = 120
Software Package:
Software NamePurpose
Blu-Icedata collection
PHASERphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-03-14
    Type: Initial release
  • Version 1.1: 2013-09-25
    Changes: Derived calculations