Structure of YqeH GTPase from Geobacillus stearothermophilus (an AtNOS1 / AtNOA1 ortholog)

Experimental Data Snapshot

  • Resolution: 2.36 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.254 

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The structure of YqeH. An AtNOS1/AtNOA1 ortholog that couples GTP hydrolysis to molecular recognition.

Sudhamsu, J.Lee, G.I.Klessig, D.F.Crane, B.R.

(2008) J Biol Chem 283: 32968-32976

  • DOI: https://doi.org/10.1074/jbc.M804837200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    AtNOS1/AtNOA1 was identified as a nitric oxide-generating enzyme in plants, but that function has recently been questioned. To resolve issues surrounding AtNOA1 activity, we report the biochemical properties and a 2.36 A resolution crystal structure of a bacterial AtNOA1 ortholog (YqeH). Geobacillus YqeH fused to a putative AtNOA1 leader peptide complements growth and morphological defects of Atnoa1 mutant plants. YqeH does not synthesize nitric oxide from L-arginine but rather hydrolyzes GTP. The YqeH structure reveals a circularly permuted GTPase domain and an unusual C-terminal beta-domain. A small N-terminal domain, disordered in the structure, binds zinc. Structural homology among the C-terminal domain, the RNA-binding regulator TRAP, and the hypoxia factor pVHL define a recognition module for peptides and nucleic acids. TRAP residues important for RNA binding are conserved by the YqeH C-terminal domain, whose positioning is coupled to GTP hydrolysis. YqeH and AtNOA1 probably act as G-proteins that regulate nucleic acid recognition and not as nitric-oxide synthases.

  • Organizational Affiliation

    Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
GTP-binding protein YqeH required for biosis of 30S ribosome subunit
A, B
369Geobacillus stearothermophilusMutation(s): 0 
Gene Names: yqeHB4114_2212D9548_03520TGS27_0162
Find proteins for D0VWU7 (Geobacillus stearothermophilus)
Explore D0VWU7 
Go to UniProtKB:  D0VWU7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupD0VWU7
Sequence Annotations
  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Resolution: 2.36 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.254 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 47.615α = 90
b = 81.097β = 91.5
c = 108.173γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-10-21
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2020-06-24
    Changes: Database references, Source and taxonomy, Structure summary
  • Version 1.3: 2024-02-21
    Changes: Data collection, Database references, Derived calculations