1BYY

SODIUM CHANNEL IIA INACTIVATION GATE


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 25 
  • Conformers Submitted: 10 
  • Selection Criteria: NO VIOLATIONS >0.3 DEGREES OR 3 ANGSTROMS; LOWEST ENERGY 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Solution structure of the sodium channel inactivation gate.

Rohl, C.A.Boeckman, F.A.Baker, C.Scheuer, T.Catterall, W.A.Klevit, R.E.

(1999) Biochemistry 38: 855-861

  • DOI: 10.1021/bi9823380

  • PubMed Abstract: 
  • The sodium channel initiates action potentials by opening in response to membrane depolarization. Fast channel inactivation, which is required for proper physiological function, is mediated by a cytoplasmic loop proposed to occlude the ion pore via a ...

    The sodium channel initiates action potentials by opening in response to membrane depolarization. Fast channel inactivation, which is required for proper physiological function, is mediated by a cytoplasmic loop proposed to occlude the ion pore via a hinged lid mechanism with the triad IFM serving as a hydrophobic "latch". The NMR solution structure of the isolated inactivation gate reveals a stably folded core comprised of an alpha-helix capped by an N-terminal turn, supporting a model in which the tightly folded core containing the latch motif pivots on a more flexible hinge region to occlude the pore during inactivation. The structure, in combination with substituted cysteine mutagenesis experiments, indicates that the IFM triad and adjacent Thr are essential components of the latch and suggests differing roles for the residues of the IFMT motif in fast inactivation.


    Organizational Affiliation

    Department of Biochemistry, University of Washington, Seattle 98195, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROTEIN (SODIUM CHANNEL ALPHA-SUBUNIT)
A
53Rattus norvegicusMutation(s): 0 
Gene Names: Scn2a (Scn2a1)
Find proteins for P04775 (Rattus norvegicus)
Go to UniProtKB:  P04775
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 25 
  • Conformers Submitted: 10 
  • Selection Criteria: NO VIOLATIONS >0.3 DEGREES OR 3 ANGSTROMS; LOWEST ENERGY 
  • Olderado: 1BYY Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-10-29
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance