1CIQ

COMPLEX OF TWO FRAGMENTS OF CI2, RESIDUES 1-40 AND 41-64


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Towards the complete structural characterization of a protein folding pathway: the structures of the denatured, transition and native states for the association/folding of two complementary fragments of cleaved chymotrypsin inhibitor 2. Direct evidence for a nucleation-condensation mechanism

Neira, J.L.Davis, B.Ladurner, A.G.Buckle, A.M.Gay Gde, P.Fersht, A.R.

(1996) Structure Fold.Des. 1: 189-208

  • Primary Citation of Related Structures:  1CIR

  • PubMed Abstract: 
  • Single-module proteins, such as chymotrypsin inhibitor 2 (CI2), fold as a single cooperative unit. To solve its folding pathway, we must characterize, under conditions that favour folding, its denatured state, its transition state, and its final fold ...

    Single-module proteins, such as chymotrypsin inhibitor 2 (CI2), fold as a single cooperative unit. To solve its folding pathway, we must characterize, under conditions that favour folding, its denatured state, its transition state, and its final folded structure. To obtain a "denatured state' that can readily be thus characterized, we have used a trick of cleaving CI2 into two complementary fragments that associate and fold in a similar way to intact protein.


    Related Citations: 
    • The Structure of the Transition State for the Association of Two Fragments of the Barley Chymotrypsin Inhibitor-2 to Generate Native-Like Protein: Implications for Mechanisms of Protein Folding
      De Prat Gay, G.,Ruiz-Sanz, J.,Davis, B.,Fersht, A.R.
      (1994) Proc.Natl.Acad.Sci.USA 91: 10943
    • Generation of a Family of Protein Fragments for Structure-Folding Studies. 1. Folding Complementation of Two Fragments of Chymotrypsin Inhibitor-2 Formed by Cleavage at its Unique Methionine Residue
      De Prat Gay, G.,Fersht, A.R.
      (1994) Biochemistry 33: 7957


    Organizational Affiliation

    MRC Unit for Protein Function and Design, Cambridge Centre for Protein Engineering, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CHYMOTRYPSIN INHIBITOR 2
A
40Hordeum vulgareN/A
Find proteins for P01053 (Hordeum vulgare)
Go to UniProtKB:  P01053
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
CHYMOTRYPSIN INHIBITOR 2
B
24Hordeum vulgareN/A
Find proteins for P01053 (Hordeum vulgare)
Go to UniProtKB:  P01053
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • Space Group: P 6 2 2
Unit Cell:
Length (Å)Angle (°)
a = 69.170α = 90.00
b = 69.170β = 90.00
c = 53.910γ = 120.00
Software Package:
Software NamePurpose
CCP4data reduction
MOSFLMdata reduction
PROLSQrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1996-03-08
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance