The crystal structure of the intact human GlnRS

Experimental Data Snapshot

  • Resolution: 2.40 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.212 

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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: https://doi.org/10.1093/nar/gkw082
  • Primary Citation of Related Structures:  
    4YE6, 4YE8, 4YE9

  • 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 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.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Glutamine--tRNA ligase776Homo sapiensMutation(s): 0 
Gene Names: QARS
UniProt & NIH Common Fund Data Resources
Find proteins for P47897 (Homo sapiens)
Explore P47897 
Go to UniProtKB:  P47897
GTEx:  ENSG00000172053 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP47897
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.40 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.212 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 333.679α = 90
b = 57.983β = 90
c = 86.123γ = 90
Software Package:
Software NamePurpose
HKL-2000data scaling
PDB_EXTRACTdata extraction
HKL-2000data reduction

Structure Validation

View Full Validation Report

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  (Full details and data files)

  • Version 1.0: 2016-02-17
    Type: Initial release
  • Version 1.1: 2016-02-24
    Changes: Database references
  • Version 1.2: 2016-05-04
    Changes: Database references
  • Version 1.3: 2017-09-27
    Changes: Author supporting evidence, Database references, Derived calculations, Refinement description
  • Version 1.4: 2019-12-25
    Changes: Author supporting evidence
  • Version 1.5: 2024-02-28
    Changes: Data collection, Database references