1MOT

NMR Structure Of Extended Second Transmembrane Domain Of Glycine Receptor alpha1 Subunit in SDS Micelles


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 30 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

NMR Structure and Backbone Dynamics of the Extended Second Transmembrane Domain of the Human Neuronal Glycine Receptor Alpha1 Subunit

Yushmanov, V.E.Mandal, P.K.Liu, Z.Tang, P.Xu, Y.

(2003) Biochemistry 42: 3989-3995

  • DOI: https://doi.org/10.1021/bi026767g
  • Primary Citation of Related Structures:  
    1MOT

  • PubMed Abstract: 

    The structure and backbone dynamics of an extended second transmembrane segment (TM2e) of the human neuronal glycine receptor alpha(1) subunit in sodium dodecyl sulfate micelles were studied by (1)H and (15)N solution-state NMR. The 28-amino acid segment contained the consensus TM2 domain plus part of the linker between the second and third transmembrane domains. The presence of a well-structured helical region of at least 13 amino acids long and an unstructured region near the linker was evident from the proton chemical shifts and the pattern of midrange nuclear Overhauser effects (NOE). (15)N relaxation rate constants, R(1) and R(2), and (15)N-[(1)H] NOE indicated restricted internal motions in the helical region with NOE values between 0.6 and 0.8. The squared order parameter (S(2)), the effective correlation time for fast internal motions (tau(e)), and the global rotational correlation time (tau(m)) were calculated for all TM2e backbone N-H bonds using the model-free approach. The S(2) values ranged about 0.75-0.86, and the tau(e) values were below 100 ps for most of the residues in the helical region. The tau(m) value, calculated from the dynamics of the helical region, was 5.1 ns. The S(2) values decreased to 0.1, and the tau(e) values sharply increased up to 1.2 ns at the linker near the C-terminus, indicating that the motion of this region is unrestricted. The results suggest a relatively high degree of motional freedom of TM2e in micelles and different propensities of the N- and C-terminal moieties of the transmembrane domain to assume stable helical structures.


  • Organizational Affiliation

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


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Glycine Receptor alpha-1 CHAIN28Homo sapiensMutation(s): 0 
Gene Names: GLRA1
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P23415 (Homo sapiens)
Explore P23415 
Go to UniProtKB:  P23415
PHAROS:  P23415
GTEx:  ENSG00000145888 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP23415
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 30 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-09-23
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-02-23
    Changes: Data collection, Database references, Derived calculations
  • Version 1.4: 2024-05-22
    Changes: Data collection