Experimental Data Snapshot

  • Resolution: 2.14 Å
  • R-Value Work: 0.193 

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Crystal structure of the YajQ protein from Haemophilus influenzae reveals a tandem of RNP-like domains

Teplyakov, A.Obmolova, G.Bir, N.Reddy, P.Howard, A.J.Gilliland, G.L.

(2003) J Struct Funct Genomics 4: 1-9

  • DOI: https://doi.org/10.1023/a:1024620416876
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    A hypothetical protein encoded by the gene YajQ of Haemophilus influenzae was selected, as part of a structural genomics project, for X-ray crystallographic structure determination and analysis to assist with the functional assignment. The protein is present in most bacteria, but not in archaea or eukaryotes. The amino acid sequence has no homology to that of other proteins. The YajQ protein was cloned, expressed, and the crystal structure determined at 2.1-A resolution by applying the multiwavelength anomalous dispersion method to a mercury derivative. The polypeptide chain is folded into two domains with identical folding topology. Each domain has a four-stranded antiparallel beta-sheet flanked on one side by two alpha-helices. This structural motif is a characteristic feature of many RNA-binding proteins. The tetrameric structure observed in the crystal suggests a possibility of binding two stretches of double-stranded nucleic acid.

  • Organizational Affiliation

    Center for Advanced Research in Biotechnology of the University of Maryland Biotechnology Institute and the National Institute of Standards and Technology, 9600 Gudelsky Drive, Rockville, MD 20850, USA. alexey@carb.nist.gov

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
163Haemophilus influenzaeMutation(s): 0 
Gene Names: yajQ
Find proteins for P44096 (Haemophilus influenzae (strain ATCC 51907 / DSM 11121 / KW20 / Rd))
Explore P44096 
Go to UniProtKB:  P44096
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP44096
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.14 Å
  • R-Value Work: 0.193 
  • Space Group: P 43 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 62.8α = 90
b = 62.8β = 90
c = 194.5γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-06-10
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-02-07
    Changes: Data collection, Database references, Derived calculations