1HD9

The Bowman-Birk Inhibitor Reactive Site Loop Sequence Represents an Independent Structural Beta-Hairpin Motif


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 30 
  • Selection Criteria: LOWEST ENERGY 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The Bowman-Birk Inhibitor Reactive Site Loop Sequence Represents an Independent Structural Beta-Hairpin Motif

Brauer, A.B.E.Kelly, G.Mcbride, J.D.Cooke, R.M.Matthews, S.J.Leatherbarrow, R.J.

(2001) J.Mol.Biol. 306: 799

  • DOI: 10.1006/jmbi.2000.4410
  • Also Cited By: 1GM2

  • PubMed Abstract: 
  • We have determined the NMR structure in aqueous solution of a disulphide-cyclised 11-residue peptide that forms a stable beta-hairpin, incorporating a type VIb beta-turn. The structure is found to be extremely well ordered for a short peptide, with t ...

    We have determined the NMR structure in aqueous solution of a disulphide-cyclised 11-residue peptide that forms a stable beta-hairpin, incorporating a type VIb beta-turn. The structure is found to be extremely well ordered for a short peptide, with the 30 lowest energy simulated annealing structures having an average pairwise r.m.s. deviation of only 0.36 A over the backbone. All but three side-chains adopt distinct conformations, allowing a detailed analysis of their involvement in cross-strand interactions. The peptide sequence analysed originates from a previously reported study, which identified potent inhibitors of human leukocyte elastase from screening a combinatorial peptide library based on the short protein beta-sheet segment that forms the reactive site loop of Bowman-Birk inhibitors. A detailed comparison of the peptide's solution structure with the corresponding region in the whole protein structure reveals a very good correspondence not only for the backbone (r.m.s. deviation approximately 0.7 A) but also for the side-chains. This isolated beta-hairpin retains the biologically active "canonical conformation" typical of small serine proteinase inhibitor proteins, which explains why it retains inhibitory activity. Since the structural integrity is sequence-inherent and does not depend upon the presence of the remaining protein, this beta-hairpin represents an independent structural motif and so provides a useful model of this type of protein architecture and its relation to biological function. The relationship between the conformation of this beta-hairpin and its biological activity is discussed.


    Related Citations: 
    • Selection of Human Elastase Inhibitors from a Conformationally-Constrained Combinatorial Peptide Library
      Mcbride, J.D.,Freeman, H.N.M.,Leatherbarrow, R.J.
      (1999) Eur.J.Biochem. 266: 403


    Organizational Affiliation

    Department of Chemistry, Imperial College of Science Technology and Medicine, South Kensington, London, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
BOWMAN-BIRK INHIBITOR DERIVED PEPTIDE
A
11N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
NLE
Query on NLE
A
L-PEPTIDE LINKINGC6 H13 N O2LEU
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 30 
  • Selection Criteria: LOWEST ENERGY 
  • Olderado: 1HD9 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-03-29
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Atomic model, Database references, Derived calculations, Non-polymer description, Structure summary, Version format compliance