Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 120 
  • Conformers Submitted: 20 
  • Selection Criteria: LOWEST ENERGY 

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The Structure of the Coliphage Hk022 Nun Protein-Lambda-Phage Boxb RNA Complex. Implications for the Mechanism of Transcription Termination

Faber, C.Schaerpf, M.Becker, T.Sticht, H.Roesch, P.

(2001) J Biol Chem 276: 32064

  • DOI: https://doi.org/10.1074/jbc.M102975200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Nun protein from coliphage HK022 binds to phage boxB RNA and functions, in contrast to phage lambda N protein, as a transcriptional terminator. The basic Nun-(10-44) peptide contains the boxB RNA binding arginine rich motif, ARM. The peptide binds boxB RNA and competes with the phage lambda ARM peptide N-(1-36) as indicated by nuclear magnetic resonance (NMR) spectroscopy titrations. In two-dimensional nuclear Overhauser enhancement spectroscopy experiments boxB RNA in complex with Nun-(20-44) exhibits the same pattern of resonances as it does in complex with N peptides containing the ARM, and we could show that Nun-(20-44) forms a bent alpha-helix upon binding to the boxB RNA. The structure of the boxB RNA-bound Nun-(20-44) was determined on the basis of 191 intra- and 30 intermolecular distance restraints. Ser-24 is anchored to the lower RNA stem, and stacking of Tyr-39 and A7 is clearly experimentally indicated. Arg-28 shows numerous contacts to the RNA stem. Leu-22, Ile-30, Trp-33, Ile-37, and Leu-41 form a hydrophobic surface, which could be a recognition site for additional host factors such as NusG. Such a hydrophobic surface area is not present in N-(1-36) bound to boxB RNA.

  • Organizational Affiliation

    Lehrstuhl für Biopolymere, Universität Bayreuth, Universitätsstr. 30, 95440 Bayreuth, Germany.


Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
NUN-PROTEIN26Shamshuipovirus HK022Mutation(s): 0 
Find proteins for P18683 (Escherichia phage HK022)
Explore P18683 
Go to UniProtKB:  P18683
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP18683
Sequence Annotations
  • Reference Sequence

Find similar nucleic acids by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChains LengthOrganismImage
RNA (5-R(P*GP*CP*CP*CP*UP*GP*AP*AP*AP*AP*AP*GP*GP*GP*C)-3)15Lambdavirus lambda
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 120 
  • Conformers Submitted: 20 
  • Selection Criteria: LOWEST ENERGY 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-01-29
    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: 2017-06-14
    Changes: Structure summary
  • Version 1.4: 2024-05-15
    Changes: Data collection, Database references, Other