Crystal structure of NusA from Thermotoga maritima

Experimental Data Snapshot

  • Resolution: 2.10 Å
  • R-Value Free: 0.319 
  • R-Value Work: 0.244 
  • R-Value Observed: 0.244 

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An Extended RNA Binding Surface Through Arrayed S1 and Kh Domains in Transcription Factor Nusa

Worbs, M.Bourenkov, G.P.Bartunik, H.D.Huber, R.Wahl, M.C.

(2001) Mol Cell 7: 1177

  • DOI: https://doi.org/10.1016/s1097-2765(01)00262-3
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The crystal structure of Thermotoga maritima NusA, a transcription factor involved in pausing, termination, and antitermination processes, reveals a four-domain, rod-shaped molecule. An N-terminal alpha/beta portion, a five-stranded beta-barrel (S1 domain), and two K-homology (KH) modules create a continuous spine of positive electrostatic potential, suitable for nonspecific mRNA attraction. Homology models suggest how, in addition, specific mRNA regulatory sequences can be recognized by the S1 and KH motifs. An arrangement of multiple S1 and KH domains mediated by highly conserved residues is seen, creating an extended RNA binding surface, a paradigm for other proteins with similar domain arrays. Structural and mutational analyses indicate that the motifs cooperate, modulating strength and specificity of RNA binding.

  • Organizational Affiliation

    Max-Planck-Institut für Biochemie, Abteilung Strukturforschung, Am Klopferspitz 18a, D-82152, Martinsried, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
N UTILIZATION SUBSTANCE PROTEIN AA [auth P]344Thermotoga maritimaMutation(s): 0 
Gene Names: NUSA
Find proteins for Q9X298 (Thermotoga maritima (strain ATCC 43589 / DSM 3109 / JCM 10099 / NBRC 100826 / MSB8))
Explore Q9X298 
Go to UniProtKB:  Q9X298
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9X298
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.10 Å
  • R-Value Free: 0.319 
  • R-Value Work: 0.244 
  • R-Value Observed: 0.244 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 115.531α = 90
b = 115.531β = 90
c = 63.81γ = 90
Software Package:
Software NamePurpose

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-10-19
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-05-08
    Changes: Data collection, Database references