1PCQ

Crystal structure of groEL-groES


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.808 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.262 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Role of the gamma-phosphate of ATP in triggering protein folding by GroEL-GroES: function, structure and energetics.

Chaudhry, C.Farr, G.W.Todd, M.J.Rye, H.S.Brunger, A.T.Adams, P.D.Horwich, A.L.Sigler, P.B.

(2003) Embo J. 22: 4877-4887

  • DOI: 10.1093/emboj/cdg477
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Productive cis folding by the chaperonin GroEL is triggered by the binding of ATP but not ADP, along with cochaperonin GroES, to the same ring as non-native polypeptide, ejecting polypeptide into an encapsulated hydrophilic chamber. We examined the s ...

    Productive cis folding by the chaperonin GroEL is triggered by the binding of ATP but not ADP, along with cochaperonin GroES, to the same ring as non-native polypeptide, ejecting polypeptide into an encapsulated hydrophilic chamber. We examined the specific contribution of the gamma-phosphate of ATP to this activation process using complexes of ADP and aluminium or beryllium fluoride. These ATP analogues supported productive cis folding of the substrate protein, rhodanese, even when added to already-formed, folding-inactive cis ADP ternary complexes, essentially introducing the gamma-phosphate of ATP in an independent step. Aluminium fluoride was observed to stabilize the association of GroES with GroEL, with a substantial release of free energy (-46 kcal/mol). To understand the basis of such activation and stabilization, a crystal structure of GroEL-GroES-ADP.AlF3 was determined at 2.8 A. A trigonal AlF3 metal complex was observed in the gamma-phosphate position of the nucleotide pocket of the cis ring. Surprisingly, when this structure was compared with that of the previously determined GroEL-GroES-ADP complex, no other differences were observed. We discuss the likely basis of the ability of gamma-phosphate binding to convert preformed GroEL-GroES-ADP-polypeptide complexes into the folding-active state.


    Organizational Affiliation

    Department of Molecular Biophysics and Biochemistry and Howard Hughes Medical Institute, Yale University, New Haven, CT, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
groEL protein
A, B, C, D, E, F, G, H, I, J, K, L, M, N
524Escherichia coli (strain K12)Gene Names: groL (groEL, mopA)
Find proteins for P0A6F5 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A6F5
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
groES protein
O, P, Q, R, S, T, U
97Escherichia coli (strain K12)Gene Names: groS (groES, mopB)
Find proteins for P0A6F9 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A6F9
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
K
Query on K

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G
POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
 Ligand Interaction
ADP
Query on ADP

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
AF3
Query on AF3

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G
ALUMINUM FLUORIDE
Al F3
KLZUFWVZNOTSEM-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.808 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.262 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 255.546α = 90.00
b = 266.855β = 90.00
c = 187.049γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
DENZOdata reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-10-14
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance