1ZFI

Solution structure of the leech carboxypeptidase inhibitor


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 40 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

NMR structural characterization and computational predictions of the major intermediate in oxidative folding of leech carboxypeptidase inhibitor

Arolas, J.L.D'Silva, L.Popowicz, G.M.Aviles, F.X.Holak, T.A.Ventura, S.

(2005) STRUCTURE 13: 1193-1202

  • DOI: 10.1016/j.str.2005.05.008
  • Primary Citation of Related Structures:  
  • Also Cited By: 2ABZ

  • PubMed Abstract: 
  • The III-A intermediate constitutes the major rate-determining step in the oxidative folding of leech carboxypeptidase inhibitor (LCI). In this work, III-A has been directly purified from the folding reaction and structurally characterized by NMR spec ...

    The III-A intermediate constitutes the major rate-determining step in the oxidative folding of leech carboxypeptidase inhibitor (LCI). In this work, III-A has been directly purified from the folding reaction and structurally characterized by NMR spectroscopy. This species, containing three native disulfides, displays a highly native-like structure; however, it lacks some secondary structure elements, making it more flexible than native LCI. III-A represents a structurally determined example of a disulfide-insecure intermediate; direct oxidation of this species to the fully native protein seems to be restricted by the burial of its two free cysteine residues inside a native-like structure. We also show that theoretical approaches based on topological constraints predict with good accuracy the presence of this folding intermediate. Overall, the derived results suggest that, as it occurs with non-disulfide bonded proteins, native-like interactions between segments of secondary structure rather than the crosslinking of disulfide bonds direct the folding of LCI.


    Related Citations: 
    • Structure of a novel leech carboxypeptidase inhibitor determined free in solution and in complex with human carboxypeptidase A2
      Reverter, D.,Fernandez-Catalan, C.,Baumgartner, R.,Pfander, R.,Huber, R.,Bode, W.,Vendrell, J.,Holak, T.A.,Aviles, F.X.
      (2000) Nat.Struct.Mol.Biol. 7: 322


    Organizational Affiliation

    Institut de Biotecnologia i de Biomedicina and Departament de Bioquímica i Biologia Molecular, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Metallocarboxypeptidase inhibitor
A
67Hirudo medicinalisMutation(s): 0 
Find proteins for P81511 (Hirudo medicinalis)
Go to UniProtKB:  P81511
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 40 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 1ZFI Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-09-13
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance