2EU1

Crystal structure of the chaperonin GroEL-E461K


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.29 Å
  • R-Value Free: 0.296 
  • R-Value Work: 0.276 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Crystal structure of the temperature-sensitive and allosteric-defective chaperonin GroEL(E461K).

Cabo-Bilbao, A.Spinelli, S.Sot, B.Agirre, J.Mechaly, A.E.Muga, A.Guerin, D.M.A.

(2006) J.Struct.Biol. 155: 482-492

  • DOI: 10.1016/j.jsb.2006.06.008
  • Primary Citation of Related Structures:  2YEY

  • PubMed Abstract: 
  • The chaperonin GroEL adopts a double-ring structure with various modes of allosteric communication. The simultaneous positive intra-ring and negative inter-ring co-operativities alternate the functionality of the folding cavities in both protein ring ...

    The chaperonin GroEL adopts a double-ring structure with various modes of allosteric communication. The simultaneous positive intra-ring and negative inter-ring co-operativities alternate the functionality of the folding cavities in both protein rings. Negative inter-ring co-operativity is maintained through different inter-ring interactions, including a salt bridge involving Glu 461. Replacement of this residue by Lys modifies the temperature sensitivity of the substrate-folding activity of this protein, most likely as a result of the loss of inter-ring co-operativity. The crystal structure of the mutant chaperonin GroELE461K has been determined at 3.3A and compared with other structures: the wild-type GroEL, an allosteric defective GroEL double mutant and the GroEL-GroES-(ADP)7 complex. The inter-ring region of the mutant exhibits the following characteristics: (i) no salt-bridge stabilizes the inter-ring interface; (ii) the mutated residue plays a central role in defining the relative ring rotation (of about 22 degrees) around the 7-fold axis; (iii) an increase in the inter-ring distance and solvent accessibility of the inter-ring interface; and (iv) a 2-fold reduction in the stabilization energy of the inter-ring interface, due to the modification of inter-ring interactions. These characteristics explain how the thermal sensitivity of the protein's fundamental properties permits GroEL to distinguish physiological (37 degrees C) from stress (42 degrees C) temperatures.


    Related Citations: 
    • Conformational variability in the refined structure of the chaperonin GroEL at 2.8 A resolution
      Braig, K.,Adams, P.D.,Brunger, A.T.
      (1995) Nature 2: 1083
    • The crystal structure of the asymmetric GroEL-GroES-(ADP)7 chaperonin complex
      Xu, Z.,Horwich, A.L.,Sigler, P.B.
      (1997) Nature 388: 741
    • Ionic interactions at both inter-ring contact sites of GroEL are involved in transmission of the allosteric signal: a time-resolved infrared difference study
      Sot, B.,von Germar, F.,Mantele, W.,Valpuesta, J.M.,Taneva, S.G.,Muga, A.
      (2005) Protein Sci. 14: 2267
    • GroEL stability and function. Contribution of the ionic interactions at the inter-ring contact sites
      Sot, B.,Banuelos, S.,Valpuesta, J.M.,Muga, A.
      (2003) J.Biol.Chem. 278: 32083
    • Salt bridges at the inter-ring interface regulate the thermostat of GroEL
      Sot, B.,Galan, A.,Valpuesta, J.M.,Bertrand, S.,Muga, A.
      (2002) J.Biol.Chem. 277: 34024
    • Crystal structure of wild-type chaperonin GROEL
      Bartolucci, C.,Lamba, D.,Grazulis, S.,Manakova, E.,Heumann, H.
      (2005) J.Mol.Biol. 354: 940
    • A mutant chaperonin with rearranged inter-ring electrostatic contacts and temperature-sensitive dissociation
      Sewell, B.T.,Best, R.B.,Chen, S.,Roseman, A.M.,Farr, G.W.,Horwich, A.L.,Saibil, H.R.
      (2004) Nat.Struct.Mol.Biol. 11: 1128


    Organizational Affiliation

    Unidad de BiofĂ­sica (CSIC-UPV/EHU), P.O. Box 644, E-48080 Bilbao, Spain.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GROEL
A, B, C, D, E, F, G, H, I, J, K, L, M, N
548Escherichia coli (strain K12)Gene Names: groL (groEL, mopA)
Find proteins for P0A6F5 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A6F5
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.29 Å
  • R-Value Free: 0.296 
  • R-Value Work: 0.276 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 267.695α = 90.00
b = 290.641β = 90.00
c = 247.006γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
CCP4data scaling
CNSrefinement
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-08-29
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance
  • Version 1.3: 2018-01-31
    Type: Database references