3AEI

Crystal structure of the prefoldin beta2 subunit from Thermococcus strain KS-1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.210 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Thermodynamic Characterization of the Interaction between Prefoldin and Group II Chaperonin

Sahlan, M.Zako, T.Tai, P.T.Ohtaki, A.Noguchi, K.Maeda, M.Miyatake, H.Dohmae, N.Yohda, M.

(2010) J Mol Biol 399: 628-636

  • DOI: 10.1016/j.jmb.2010.04.046
  • Primary Citation of Related Structures:  
    3AEI

  • PubMed Abstract: 
  • Prefoldin (PFD) is a hexameric chaperone that captures a protein substrate and transfers it to a group II chaperonin (CPN) to complete protein folding. We have studied the interaction between PFD and CPN using those from a hyperthermophilic archaeon, Thermococcus strain KS-1 (T ...

    Prefoldin (PFD) is a hexameric chaperone that captures a protein substrate and transfers it to a group II chaperonin (CPN) to complete protein folding. We have studied the interaction between PFD and CPN using those from a hyperthermophilic archaeon, Thermococcus strain KS-1 (T. KS-1). In this study, we determined the crystal structure of the T. KS-1 PFDbeta2 subunit and characterized the interactions between T. KS-1 CPNs (CPNalpha and CPNbeta) and T. KS-1 PFDs (PFDalpha1-beta1 and PFDalpha2-beta2). As predicted from its amino acid sequence, the PFDbeta2 subunit conforms to a structure similar to those of the PFDbeta1 subunit and the Pyrococcus horikoshii OT3 PFDbeta subunit, with the exception of the tip of its coiled-coil domain, which is thought to be the CPN interaction site. The interactions between T. KS-1 CPNs and PFDs (CPNalpha and PFDalpha1-beta1; CPNalpha and PFDalpha2-beta2; CPNbeta and PFDalpha1-beta1; and CPNbeta and PFDalpha2-beta2) were analyzed using the Biacore T100 system at various temperatures ranging from 20 to 45 degrees C. The affinities between PFDs and CPNs increased with an increase in temperature. The thermodynamic parameters calculated from association constants showed that the interaction between PFD and CPN is entropy driven. Among the four combinations of PFD-CPN interactions, the entropy difference in binding between CPNbeta and PFDalpha2-beta2 was the largest, and affinity significantly increased at higher temperatures. Considering that expression of PFDalpha2-beta2 and CPNbeta subunit is induced upon heat shock, our results suggest that PFDalpha1-beta1 is a general PFD for T. KS-1 CPNs, whereas PFDalpha2-beta2 is specific for CPNbeta.


    Organizational Affiliation

    Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei-shi, Tokyo 184-8588, Japan.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Prefoldin beta subunit 2A, B99Thermococcus sp. JCM 11816Mutation(s): 0 
Gene Names: pfdB2
Find proteins for B0I3E2 (Thermococcus sp. (strain JCM 11816 / KS-1))
Explore B0I3E2 
Go to UniProtKB:  B0I3E2
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.210 
  • Space Group: P 4 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 67.315α = 90
b = 67.315β = 90
c = 92.415γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
SOLVEphasing
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-05-19
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance