1PP5

Structure of Antibacterial Peptide Microcin J25: a 21-Residue Lariat Protoknot


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 60 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Structure of Antibacterial Peptide Microcin J25: A 21-Residue Lariat Protoknot.

Bayro, M.J.Mukhopadhyay, J.Swapna, G.V.T.Huang, J.Y.Ma, L.-C.Sineva, E.Dawson, P.E.Montelione, G.T.Ebright, R.H.

(2003) J Am Chem Soc 125: 12382-12383

  • DOI: https://doi.org/10.1021/ja036677e
  • Primary Citation of Related Structures:  
    1PP5

  • PubMed Abstract: 

    The antibacterial peptide microcin J25 (MccJ25) inhibits bacterial transcription by binding within, and obstructing, the nucleotide-uptake channel of bacterial RNA polymerase. Published covalent and three-dimensional structures indicate that MccJ25 is a 21-residue cycle. Here, we show that the published covalent and three-dimensional structures are incorrect, and that MccJ25 in fact is a 21-residue "lariat protoknot", consisting of an 8-residue cyclic segment followed by a 13-residue linear segment that loops back and threads through the cyclic segment. MccJ25 is the first example of a lariat protoknot involving a backbone-side chain amide linkage.


  • Organizational Affiliation

    Department of Molecular Biology and Biochemistry, Waksman Institute, and Howard Hughes Medical Institute, Rutgers University, Piscataway, New Jersey 08854, USA.


Macromolecules

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
microcin J2521Escherichia coliMutation(s): 0 
Gene Names: MCJA
UniProt
Find proteins for Q9X2V7 (Escherichia coli)
Explore Q9X2V7 
Go to UniProtKB:  Q9X2V7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9X2V7
Sequence Annotations
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  • Reference Sequence
Biologically Interesting Molecules (External Reference) 1 Unique
Entity ID: 1
IDChains NameType/Class2D Diagram3D Interactions
PRD_000184
Query on PRD_000184
A
Microcin J25Polypeptide / Inhibitor
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 60 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report



Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2003-10-28
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2011-07-27
    Changes: Non-polymer description, Structure summary
  • Version 1.4: 2012-12-12
    Changes: Other