Crystal structure of archaeal transcription termination factor NusA

Experimental Data Snapshot

  • Resolution: 2.00 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.184 

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Crystal structure and RNA-binding analysis of the archaeal transcription factor NusA

Shibata, R.Bessho, Y.Shinkai, A.Nishimoto, M.Fusatomi, E.Terada, T.Shirouzu, M.Yokoyama, S.

(2007) Biochem Biophys Res Commun 355: 122-128

  • DOI: https://doi.org/10.1016/j.bbrc.2007.01.119
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The transcription factor NusA functions in transcriptional regulation involving termination in bacteria. A NusA homolog consisting of only the two KH domains is widely conserved in archaea, but its function remains unknown. We have found that Aeropyrum pernix NusA strongly binds to a certain CU-rich sequence near a termination signal. Our crystal structure of A. pernix NusA revealed that its spatial arrangement is quite similar to that of the KH domains of bacterial NusA. Thus, we consider archaeal NusA to have retained some functions of bacterial NusA, including the ssRNA-binding ability. Remarkable structural differences between archaeal and bacterial NusA exist at the interface with RNAP, in connection with the different NusA-binding sites around the termination signals. Transcriptional termination in archaea could differ from all of the known bacterial and eukaryal mechanisms, in terms of the combination of a bacterial factor and a eukaryal-type RNAP.

  • Organizational Affiliation

    RIKEN Genomic Sciences Center, 1-7-22 Suehiro-cho, Tsurumi, Yokohama 230-0045, Japan.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
NusA144Aeropyrum pernix K1Mutation(s): 0 
Find proteins for Q9YAU4 (Aeropyrum pernix (strain ATCC 700893 / DSM 11879 / JCM 9820 / NBRC 100138 / K1))
Explore Q9YAU4 
Go to UniProtKB:  Q9YAU4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9YAU4
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.00 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.184 
  • Space Group: I 41
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 100.348α = 90
b = 100.348β = 90
c = 45.77γ = 90
Software Package:
Software NamePurpose
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-12-28
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Source and taxonomy, Version format compliance
  • Version 1.3: 2024-03-13
    Changes: Data collection, Database references