2LO7

Ts16 NMR solution structure


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: 20 structures for lowest energy and no violations 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

New Tricks of an Old Pattern: STRUCTURAL VERSATILITY OF SCORPION TOXINS WITH COMMON CYSTEINE SPACING.

Saucedo, A.L.Flores-Solis, D.Rodriguez de la Vega, R.C.Ramirez-Cordero, B.Hernandez-Lopez, R.Cano-Sanchez, P.Navarro, R.N.Garcia-Valdes, J.Coronas-Valderrama, F.de Roodt, A.Brieba, L.G.Possani, L.D.Del Rio-Portilla, F.

(2012) J.Biol.Chem. 287: 12321-12330

  • DOI: 10.1074/jbc.M111.329607
  • Primary Citation of Related Structures:  2LI3

  • PubMed Abstract: 
  • Scorpion venoms are a rich source of K(+) channel-blocking peptides. For the most part, they are structurally related small disulfide-rich proteins containing a conserved pattern of six cysteines that is assumed to dictate their common three-dimensio ...

    Scorpion venoms are a rich source of K(+) channel-blocking peptides. For the most part, they are structurally related small disulfide-rich proteins containing a conserved pattern of six cysteines that is assumed to dictate their common three-dimensional folding. In the conventional pattern, two disulfide bridges connect an α-helical segment to the C-terminal strand of a double- or triple-stranded β-sheet, conforming a cystine-stabilized α/β scaffold (CSα/β). Here we show that two K(+) channel-blocking peptides from Tityus scorpions conserve the cysteine spacing of common scorpion venom peptides but display an unconventional disulfide pattern, accompanied by a complete rearrangement of the secondary structure topology into a CS helix-loop-helix fold. Sequence and structural comparisons of the peptides adopting this novel fold suggest that it would be a new elaboration of the widespread CSα/β scaffold, thus revealing an unexpected structural versatility of these small disulfide-rich proteins. Acknowledgment of such versatility is important to understand how venom structural complexity emerged on a limited number of molecular scaffolds.


    Organizational Affiliation

    Instituto de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, México, D.F., 04510, México.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Toxin Ts16
A
31Tityus serrulatusN/A
Find proteins for P86271 (Tityus serrulatus)
Go to UniProtKB:  P86271
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: 20 structures for lowest energy and no violations 
  • Olderado: 2LO7 Olderado

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: 2012-05-09
    Type: Database references
  • Version 1.2: 2014-01-15
    Type: Other