1VRY

Second and Third Transmembrane Domains of the Alpha-1 Subunit of Human Glycine Receptor


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: TARGET FUNCTION,STRUCTURES WITH THE LOWEST ENERGY, STRUCTURES WITH THE LEAST RESTRAINT VIOLATIONS 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure and Dynamics of the Second and Third Transmembrane Domains of Human Glycine Receptor.

Ma, D.Liu, Z.Li, L.Tang, P.Xu, Y.

(2005) Biochemistry 44: 8790-8800

  • DOI: 10.1021/bi050256n
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • A 61-residue polypeptide resembling the second and third transmembrane domains (TM23) of the alpha-1 subunit of human glycine receptor and its truncated form, both with the wild-type loop linking the two TM domains (the "23" loop), were studied using ...

    A 61-residue polypeptide resembling the second and third transmembrane domains (TM23) of the alpha-1 subunit of human glycine receptor and its truncated form, both with the wild-type loop linking the two TM domains (the "23" loop), were studied using high-resolution NMR. Well-defined domain structures can be identified for the TM2, 23 loop, and TM3 regions. Contrary to the popular model of a long and straight alpha-helical structure for the pore-lining TM2 domain for the Cys-loop receptor family, the last three residues of the TM2 domain and the first eight residues of the 23 loop (S16-S26) seem to be intrinsically nonhelical and highly flexible even in trifluoroethanol, a solvent known to promote and stabilize alpha-helical structures. The six remaining residues of the 23 loop and most of the TM3 domain exhibit helical structures with a kinked pi-helix (or a pi-turn) from W34 to C38 and a kink angle of 159 +/- 3 degrees . The tertiary fold of TM3 relative to TM2 is defined by several unambiguously identified long-range NOE cross-peaks within the loop region and between TM2 and TM3 domains. The 20 lowest-energy structures show a left-handed tilt of TM3 relative to TM2 with a tilting angle of 44 +/- 2 degrees between TM2 (V1-Q14) and TM3 (L39-E48) helix axes. This left-handed TM2-TM3 arrangement ensures a neatly packed right-handed quaternary structure of five subunits to form an ion-conducting pore. This is the first time that two TM domains of the glycine receptor linked by the important 23 loop have ever been analyzed at atomistic resolution. Many structural characteristics of the receptor can be inferred from the structural and dynamical features identified in this study.


    Organizational Affiliation

    Department of Anesthesiology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15261, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Glycine receptor alpha-1 chain
A
76Homo sapiensMutation(s): 2 
Gene Names: GLRA1
Find proteins for P23415 (Homo sapiens)
Go to Gene View: GLRA1
Go to UniProtKB:  P23415
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: TARGET FUNCTION,STRUCTURES WITH THE LOWEST ENERGY, STRUCTURES WITH THE LEAST RESTRAINT VIOLATIONS 
  • Olderado: 1VRY Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-07-26
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance