1FY9

CRYSTAL STRUCTURE OF THE HEXA-SUBSTITUTED MUTANT OF THE MOLECULAR CHAPERONIN GROEL APICAL DOMAIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.257 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Stabilization of GroEL minichaperones by core and surface mutations.

Wang, Q.Buckle, A.M.Fersht, A.R.

(2000) J.Mol.Biol. 298: 917-926

  • DOI: 10.1006/jmbi.2000.3716
  • Primary Citation of Related Structures:  1FYA

  • PubMed Abstract: 
  • We report the crystal structures of two hexa-substituted mutants of a GroEL minichaperone that are more stable than wild-type by 7.0 and 6.1 kcal mol(-1). Their structures imply that the increased stability results from multiple factors including imp ...

    We report the crystal structures of two hexa-substituted mutants of a GroEL minichaperone that are more stable than wild-type by 7.0 and 6.1 kcal mol(-1). Their structures imply that the increased stability results from multiple factors including improved hydrophobic packing, optimised hydrogen bonding and favourable structural rearrangements. It is commonly believed that protein core residues are immutable and generally optimized for energy, while on the contrary, surface residues are variable and hence unimportant for stability. But, it is now becoming clear that mutations of both core and surface residues can increase protein stability, and that protein cores are more flexible and thus more tolerant to mutation than expected. Sequence comparison of homologous proteins has provided a way to pinpoint the residues that contribute constructively to stability and to guide the engineering of protein stability. Stabilizing mutations identified by this approach are most frequently located at protein surfaces but with a few found in protein cores. In the latter case, local flexibility in the hydrophobic core is the key factor that allows the energetically favourable burial of larger hydrophobic side-chains without undue energetic penalties from steric clashes.


    Related Citations: 
    • Design of Highly Stable Functional GroEL Minichaperones
      Wang, Q.,Buckle, A.M.,Foster, N.W.,Johnson, C.M.,Fersht, A.R.
      (1999) Protein Sci. 8: 2186


    Organizational Affiliation

    MRC Centre, Cambridge Centre for Protein Engineering and Cambridge University Chemical Laboratory, Hills Road, Cambridge, CB2 2QH, United Kingdom. wang@crystal.harvard.edu




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
60 KD CHAPERONIN
A
193Escherichia coli (strain K12)Gene Names: groL (groEL, mopA)
Find proteins for P0A6F5 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A6F5
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download SDF File 
Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.257 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 75.910α = 90.00
b = 84.520β = 90.00
c = 35.280γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
MOSFLMdata reduction
CCP4data scaling
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-11-22
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Non-polymer description, Version format compliance