4YE9

The crystal structure of the G45V mutant of human GlnRS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.228 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

The crystal structure of human GlnRS provides basis for the development of neurological disorders.

Ognjenovic, J.Wu, J.Matthies, D.Baxa, U.Subramaniam, S.Ling, J.Simonovic, M.

(2016) Nucleic Acids Res. 44: 3420-3431

  • DOI: 10.1093/nar/gkw082
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Cytosolic glutaminyl-tRNA synthetase (GlnRS) is the singular enzyme responsible for translation of glutamine codons. Compound heterozygous mutations in GlnRS cause severe brain disorders by a poorly understood mechanism. Herein, we present crystal st ...

    Cytosolic glutaminyl-tRNA synthetase (GlnRS) is the singular enzyme responsible for translation of glutamine codons. Compound heterozygous mutations in GlnRS cause severe brain disorders by a poorly understood mechanism. Herein, we present crystal structures of the wild type and two pathological mutants of human GlnRS, which reveal, for the first time, the domain organization of the intact enzyme and the structure of the functionally important N-terminal domain (NTD). Pathological mutations mapping in the NTD alter the domain structure, and decrease catalytic activity and stability of GlnRS, whereas missense mutations in the catalytic domain induce misfolding of the enzyme. Our results suggest that the reduced catalytic efficiency and a propensity of GlnRS mutants to misfold trigger the disease development. This report broadens the spectrum of brain pathologies elicited by protein misfolding and provides a paradigm for understanding the role of mutations in aminoacyl-tRNA synthetases in neurological diseases.


    Organizational Affiliation

    Department of Microbiology and Molecular Genetics, The University of Texas, Health Science Center at Houston, Houston, TX 77030, USA Jiqiang.ling@uth.tmc.edu.,Department of Microbiology and Molecular Genetics, The University of Texas, Health Science Center at Houston, Houston, TX 77030, USA.,Department of Biochemistry and Molecular Genetics, University of Illinois at Chicago, Chicago, IL 60607, USA.,Department of Biochemistry and Molecular Genetics, University of Illinois at Chicago, Chicago, IL 60607, USA msimon5@uic.edu.,Laboratory of Cell Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Glutamine--tRNA ligase
A
776Homo sapiensMutation(s): 1 
Gene Names: QARS1 (QARS)
EC: 6.1.1.18
Find proteins for P47897 (Homo sapiens)
Go to UniProtKB:  P47897
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.228 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 336.940α = 90.00
b = 58.525β = 90.00
c = 86.646γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
PHENIXphasing
PHENIXrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United States--

Revision History 

  • Version 1.0: 2016-02-17
    Type: Initial release
  • Version 1.1: 2016-02-24
    Type: Database references
  • Version 1.2: 2016-05-04
    Type: Database references
  • Version 1.3: 2017-09-27
    Type: Author supporting evidence, Database references, Derived calculations
  • Version 1.4: 2019-12-25
    Type: Author supporting evidence