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Crystal structure of the receptor-binding domain of botulinum neurotoxin type HA, also known as type FA or H

Journal Article · · Toxins
 [1];  [2];  [3];  [4];  [4];  [2]
  1. Univ. of California, Irvine, CA (United States); University of California Irvine
  2. Univ. of California, Irvine, CA (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Medizinische Hochschule Hannover, Hannover (Germany)

Botulinum neurotoxins (BoNTs), which have been exploited as cosmetics and muscle-disorder treatment medicines for decades, are well known for their extreme neurotoxicity to humans. They pose a potential bioterrorism threat because they cause botulism, a flaccid muscular paralysis-associated disease that requires immediate antitoxin treatment and intensive care over a long period of time. In addition to the existing seven established BoNT serotypes (BoNT/A–G), a new mosaic toxin type termed BoNT/HA (aka type FA or H) was reported recently. Sequence analyses indicate that the receptor-binding domain (HC) of BoNT/HA is ~84% identical to that of BoNT/A1. However, BoNT/HA responds differently to some potent BoNT/A-neutralizing antibodies (e.g., CR2) that target the HC. Therefore, it raises a serious concern as to whether BoNT/HA poses a new threat to our biosecurity. In this study, we report the first high-resolution crystal structure of BoNT/HA-HC at 1.8 Å. Sequence and structure analyses reveal that BoNT/HA and BoNT/A1 are different regarding their binding to cell-surface receptors including both polysialoganglioside (PSG) and synaptic vesicle glycoprotein 2 (SV2). Furthermore, the new structure also provides explanations for the ~540-fold decreased affinity of antibody CR2 towards BoNT/HA compared to BoNT/A1. Altogether, these new findings advance our understanding of the structure and function of this newly identified toxin at the molecular level, and pave the way for the future development of more effective countermeasures.

Research Organization:
Univ. of California, Irvine, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1355928
Alternate ID(s):
OSTI ID: 1355042
Journal Information:
Toxins, Journal Name: Toxins Journal Issue: 3 Vol. 9; ISSN 2072-6651; ISSN TOXIB7
Publisher:
MDPICopyright Statement
Country of Publication:
United States
Language:
English

References (58)

Botulinum Toxin as a Biological Weapon: Medical and Public Health Management journal February 2001
Assembly and Function of the Botulinum Neurotoxin Progenitor Complex book January 2012
High-resolution crystal structure of HA33 of botulinum neurotoxin type B progenitor toxin complex journal April 2014
Distribution of SV2C mRNA and protein expression in the mouse brain with a particular emphasis on the basal ganglia system journal January 2011
Identification of the synaptic vesicle glycoprotein 2 receptor binding site in botulinum neurotoxin A journal February 2014
Fine and Domain-level Epitope Mapping of Botulinum Neurotoxin Type A Neutralizing Antibodies by Yeast Surface Display journal January 2007
Crystal Structures of Botulinum Neurotoxin DC in Complex with Its Protein Receptors Synaptotagmin I and II journal September 2013
Medical aspects of toxin weapons journal October 2005
SV2C is a synaptic vesicle protein with an unusually restricted localization: anatomy of a synaptic vesicle protein family journal November 1999
Free R value: a novel statistical quantity for assessing the accuracy of crystal structures journal January 1992
Botulinum neurotoxin A selectively cleaves the synaptic protein SNAP-25 journal September 1993
Fast, scalable generation of high‐quality protein multiple sequence alignments using Clustal Omega journal January 2011
Structural basis for recognition of synaptic vesicle protein 2C by botulinum neurotoxin A journal November 2013
Molecular evolution of antibody cross-reactivity for two subtypes of type A botulinum neurotoxin journal December 2006
Botulinum neurotoxins: genetic, structural and mechanistic insights journal June 2014
N-linked glycosylation of SV2 is required for binding and uptake of botulinum neurotoxin A journal June 2016
Host ANP32A mediates the assembly of the influenza virus replicase journal November 2020
Phylogeny and taxonomy of the food-borne pathogen Clostridium botulinum and its neurotoxins journal January 1998
Two Cases of Type E Infant Botulism Caused by Neurotoxigenic Clostridium butyricum in Italy journal August 1986
A Novel Strain of Clostridium botulinum That Produces Type B and Type H Botulinum Toxins journal October 2013
Molecular Characterization of a Novel Botulinum Neurotoxin Type H Gene journal October 2013
Immunological Characterization and Neutralizing Ability of Monoclonal Antibodies Directed Against Botulinum Neurotoxin Type H journal March 2016
Novel Application of Human Neurons Derived from Induced Pluripotent Stem Cells for Highly Sensitive Botulinum Neurotoxin Detection journal January 2012
Phaser crystallographic software journal July 2007
A graphical user interface to the CCP 4 program suite journal June 2003
Coot model-building tools for molecular graphics journal November 2004
MolProbity : all-atom structure validation for macromolecular crystallography journal December 2009
iMOSFLM : a new graphical interface for diffraction-image processing with MOSFLM journal March 2011
Botulinum Neurotoxin Is Shielded by NTNHA in an Interlocked Complex journal February 2012
Molecular basis for disruption of E-cadherin adhesion by botulinum neurotoxin A complex journal June 2014
Safety and Pharmacokinetics of XOMA 3AB, a Novel Mixture of Three Monoclonal Antibodies against Botulinum Toxin A journal June 2014
Purification and Characterization of Botulinum Neurotoxin FA from a Genetically Modified Clostridium botulinum Strain journal February 2016
Expression of SV2 isoforms during rodent brain development journal January 2013
Botulinum neurotoxin D-C uses synaptotagmin I and II as receptors, and human synaptotagmin II is not an effective receptor for type B, D-C and G toxins journal March 2012
Isolation and Functional Characterization of the Novel Clostridium botulinum Neurotoxin A8 Subtype journal February 2015
Structure of a Bimodular Botulinum Neurotoxin Complex Provides Insights into Its Oral Toxicity journal October 2013
Historical Perspectives and Guidelines for Botulinum Neurotoxin Subtype Nomenclature other January 2017
Historical Perspectives and Guidelines for Botulinum Neurotoxin Subtype Nomenclature journal January 2017
Two Feet on the Membrane: Uptake of Clostridial Neurotoxins book January 2016
Mosaic structures of neurotoxins produced from Clostridium botulinum types C and D organisms journal June 1996
How do tetanus and botulinum toxins bind to neuronal membranes? journal August 1986
Cleavage of members of the synaptobrevin/VAMP family by types D and F botulinal neurotoxins and tetanus toxin. journal April 1994
Botulism book January 2008
SV2C is a synaptic vesicle protein with an unusually restricted localization: anatomy of a synaptic vesicle protein family journal November 1999
Quantum dot immunoassays in renewable surface column and 96-well plate formats for the fluorescence detection of botulinum neurotoxin using high-affinity antibodies journal September 2009
Discovery of a novel enzymatic cleavage site for botulinum neurotoxin F5 journal December 2011
Tetanus and botulinum-B neurotoxins block neurotransmitter release by proteolytic cleavage of synaptobrevin journal October 1992
Identification of the protein receptor binding site of botulinum neurotoxins B and G proves the double-receptor concept journal December 2006
A Novel Botulinum Neurotoxin, Previously Reported as Serotype H, Has a Hybrid-Like Structure With Regions of Similarity to the Structures of Serotypes A and F and Is Neutralized With Serotype A Antitoxin journal June 2015
Deciphering key features in protein structures with the new ENDscript server journal April 2014
Phaser crystallographic software journal July 2007
A graphical user interface to the CCP 4 program suite journal June 2003
Coot model-building tools for molecular graphics journal November 2004
MolProbity : all-atom structure validation for macromolecular crystallography journal December 2009
iMOSFLM : a new graphical interface for diffraction-image processing with MOSFLM journal March 2011
Safety and Pharmacokinetics of XOMA 3AB, a Novel Mixture of Three Monoclonal Antibodies against Botulinum Toxin A journal June 2014
Draft Genome Sequence of Bivalent Clostridium botulinum Strain IBCA10-7060, Encoding Botulinum Neurotoxin B and a New FA Mosaic Type journal November 2014
Purification and Characterization of Botulinum Neurotoxin FA from a Genetically Modified Clostridium botulinum Strain journal February 2016

Cited By (6)

A Three Monoclonal Antibody Combination Potently Neutralizes Multiple Botulinum Neurotoxin Serotype E Subtypes journal March 2018
Purification and Characterization of Recombinant Botulinum Neurotoxin Serotype FA, Also Known as Serotype H journal May 2018
The Novel Clostridial Neurotoxin Produced by Strain IBCA10-7060 Is Immunologically Equivalent to BoNT/HA journal December 2019
High resolution crystal structures of the receptor-binding domain ofClostridium botulinumneurotoxin serotypes A and FA journal March 2018
Botulinum toxin: State of the art: Botulinum Toxin journal June 2017
Novel Botulinum Neurotoxins: Exploring Underneath the Iceberg Tip journal May 2018

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