1QK6

Solution structure of huwentoxin-I by NMR


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 10 
  • Selection Criteria: STEREOCHEMICAL ENERGY AND RESULT OF PROCHECK 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Proton Nuclear Magnetic Resonance Studies on Huwentoxin-I from the Venom of the Spider Selenocosmia Huwena:2.Three-Dimensional Structure in Solution

Qu, Y.Liang, S.Ding, J.Liu, X.Zhang, R.Gu, X.

(1997) J Protein Chem 16: 565-574

  • DOI: 10.1023/a:1026314722607
  • Primary Citation of Related Structures:  
    1QK6

  • PubMed Abstract: 
  • The three-dimensional structure in aqueous solution of native huwentoxin-I, a neurotoxin from the venom of the spider Selenocosmia huwena, has been determined from two-dimensional H NMR data recorded at 500 and 600 MHz. Structural constraints consisting of interproton distances inferred from NOEs and dihedral angles from spin-spin coupling constants were used as input for distance geometry calculation with the program XPLOR 3 ...

    The three-dimensional structure in aqueous solution of native huwentoxin-I, a neurotoxin from the venom of the spider Selenocosmia huwena, has been determined from two-dimensional H NMR data recorded at 500 and 600 MHz. Structural constraints consisting of interproton distances inferred from NOEs and dihedral angles from spin-spin coupling constants were used as input for distance geometry calculation with the program XPLOR 3.1. The best 10 structures have NOE violations < 0.3 A, dihedral violations < 2 degrees, and pairwise root-mean-square differences of 1.08 (+/- 0.20) A over backbone atoms (N, C alpha, C). The molecule adopts a compact structure consisting of a small triple-stranded antiparallel beta-sheet and five beta-turns. A small hydrophobic patch consisting of Phe 6, Trp 28, and Trp 31 is located on one side of the molecule. All six lysine residues are distributed on the molecular surface. The three disulfide bridges are buried within the molecule. The structure contains an "inhibitor cystine knot motif" which is adopted by several other small proteins, such as omega-conotoxin, agatoxin IVA, and gurmarin.


    Related Citations: 
    • Proton Nuclear Magnetic Resonance Studies on Huwentoxin-I from the Venom of the Spider Selenocosmia Huwena:1.Sequence-Specific 1H-NMR Assignment
      Qu, Y., Liang, S., Ding, J., Ma, L., Zhang, R., Gu, X.
      (1995) J Protein Chem 14: 549
    • Properties and Amino Acid Sequence of Huwentoxin-I, a Neurotoxin Purified from the Venom of the Chinese Bird Spider Selenocosmia Huwena
      Liang, S., Zhang, D., Pan, X., Chen, Q., Zhou, P.
      (1993) Toxicon 31: 969
    • Assignment of the Three Disulfide Bridges of Huwentoxin-I,A Neurotoxin from the Spider Selenocosmia Huwena
      Zhang, D., Liang, S.
      (1993) J Protein Chem 12: 735

    Organizational Affiliation

    Department of Biology, Peking University, Beijing, China.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HUWENTOXIN-IA33Haplopelma schmidtiMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for P56676 (Cyriopagopus schmidti)
Explore P56676 
Go to UniProtKB:  P56676
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 10 
  • Selection Criteria: STEREOCHEMICAL ENERGY AND RESULT OF PROCHECK 
  • OLDERADO: 1QK6 Olderado

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1999-08-20
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-01-16
    Changes: Data collection, Database references