Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 8.02 kDa 
• Atom Count: 548 
• Modelled Residue Count: 41 
• Deposited Residue Count: 41 
• Unique protein chains: 1
• Unique nucleic acid chains: 1

 1HJI

BACTERIOPHAGE HK022 NUN-PROTEIN-NUTBOXB-RNA COMPLEX

• PDB DOI:  https://doi.org/10.2210/pdb1HJI/pdb
• NDB: 1HJI

• Classification: BACTERIOPHAGE HK022
• Organism(s): Lambdavirus lambda, Shamshuipovirus HK022
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2001-01-15 Released: 2002-01-29 
• Deposition Author(s): Faber, C., Schaerpf, M., Becker, T., Sticht, H., Roesch, P.

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Experimental Data Snapshot

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

Literature

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

• PubMed: 11356847 
• DOI: https://doi.org/10.1074/jbc.M102975200
• Primary Citation of Related Structures:  
  1HJI


• 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.

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Related Citations: 

• Antitermination in Bacteriophage Lambda: The Structure of the N36 Peptide-Boxb RNA Complex
  Schaerpf, M., Sticht, H., Schweimer, K., Boehm, M., Hoffmann, S., Roesch, P.
  (2000) Eur J Biochem 267: 2397

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
NUN-PROTEIN	B	26	Shamshuipovirus HK022	Mutation(s): 0  Gene Names: nun
UniProt
Find proteins for P18683 (Escherichia phage HK022) Explore P18683  Go to UniProtKB:  P18683

Entity ID: 1
Molecule	Chains	Length	Organism	Image
RNA (5-R(P*GP*CP*CP*CP*UP*GP*AP*AP*AP*AP*AP*GP*GP*GP*C)-3)	A	15	Lambdavirus lambda

Experimental Data & Validation

Experimental Data

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

Structure Validation

Entry History 

Deposition Data

• Released Date: 2002-01-29 
Deposition Author(s): Faber, C., Schaerpf, M., Becker, T., Sticht, H., Roesch, P.

Revision History  

• 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