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
  • Primary Citation of Related Structures:  
    1BYY

  • 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 hinged lid mechanism with the triad IFM serving as a hydrophobic "latch" ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN (SODIUM CHANNEL ALPHA-SUBUNIT)A53Rattus norvegicusMutation(s): 0 
Gene Names: Scn2aScn2a1
UniProt
Find proteins for P04775 (Rattus norvegicus)
Explore P04775 
Go to UniProtKB:  P04775
Protein Feature View
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  • Reference Sequence
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




Entry History 

Deposition Data

Revision History  (Full details and data files)

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