3V0B

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.9 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.252 

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: 10.1126/science.1214270
  • Primary Citation of Related Structures:  

  • 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 ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
BoNT/A
A
1296Clostridium botulinum (strain Hall / ATCC 3502 / NCTC 13319 / Type A)Mutation(s): 3 
Gene Names: botA (bna)
Find proteins for P0DPI1 (Clostridium botulinum (strain Hall / ATCC 3502 / NCTC 13319 / Type A))
Go to UniProtKB:  P0DPI1
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
NTNH
B
1196Clostridium botulinumMutation(s): 0 
Gene Names: ant (ntnh)
Find proteins for Q45914 (Clostridium botulinum)
Go to UniProtKB:  Q45914
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.9 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.252 
  • Space Group: P 62 2 2
Unit Cell:
Length (Å)Angle (°)
a = 282.232α = 90.00
b = 282.232β = 90.00
c = 374.818γ = 120.00
Software Package:
Software NamePurpose
Blu-Icedata collection
PHASERphasing
HKL-2000data scaling
PHENIXrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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