1AXH

ATRACOTOXIN-HVI FROM HADRONYCHE VERSUTA (AUSTRALIAN FUNNEL-WEB SPIDER, NMR, 20 STRUCTURES


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: LOWEST RESIDUAL RESTRAINT VIOLATIONS 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

The structure of a novel insecticidal neurotoxin, omega-atracotoxin-HV1, from the venom of an Australian funnel web spider.

Fletcher, J.I.Smith, R.O'Donoghue, S.I.Nilges, M.Connor, M.Howden, M.E.Christie, M.J.King, G.F.

(1997) Nat Struct Biol 4: 559-566

  • DOI: 10.1038/nsb0797-559
  • Primary Citation of Related Structures:  
    1AXH

  • PubMed Abstract: 
  • A family of potent insecticidal toxins has recently been isolated from the venom of Australian funnel web spiders. Among these is the 37-residue peptide omega-atracotoxin-HV1 (omega-ACTX-HV1) from Hadronyche versuta. We have chemically synthesized an ...

    A family of potent insecticidal toxins has recently been isolated from the venom of Australian funnel web spiders. Among these is the 37-residue peptide omega-atracotoxin-HV1 (omega-ACTX-HV1) from Hadronyche versuta. We have chemically synthesized and folded omega-ACTX-HV1, shown that it is neurotoxic, ascertained its disulphide bonding pattern, and determined its three-dimensional solution structure using NMR spectroscopy. The structure consists of a solvent-accessible beta-hairpin protruding from a disulphide-bonded globular core comprising four beta-turns. The three intramolecular disulphide bonds from a cystine knot motif similar to that seen in several other neurotoxic peptides. Despite limited sequence identity, omega-ACTX-HV1 displays significant structural homology with the omega-agatoxins and omega-conotoxins, both of which are vertebrate calcium channel antagonists; however, in contrast with these toxins, we show that omega-ACTX-HV1 inhibits insect, but not mammalian, voltage-gated calcium channel currents.


    Related Citations: 
    Organizational Affiliation

    Department of Biochemistry, University of Sydney, New South Wales, Australia.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ATRACOTOXIN-HVIA37Hadronyche versutaMutation(s): 0 
Find proteins for P56207 (Hadronyche versuta)
Explore P56207 
Go to UniProtKB:  P56207
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: LOWEST RESIDUAL RESTRAINT VIOLATIONS 
  • OLDERADO: 1AXH Olderado

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-11-12
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-11-29
    Changes: Derived calculations, Other