Crystal structure of Pyrococcus furiosus PCC1 dimer

Experimental Data Snapshot

  • Resolution: 2.63 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.192 

wwPDB Validation   3D Report Full Report

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Atomic structure of the KEOPS complex: an ancient protein kinase-containing molecular machine.

Mao, D.Y.Neculai, D.Downey, M.Orlicky, S.Haffani, Y.Z.Ceccarelli, D.F.Ho, J.S.Szilard, R.K.Zhang, W.Ho, C.S.Wan, L.Fares, C.Rumpel, S.Kurinov, I.Arrowsmith, C.H.Durocher, D.Sicheri, F.

(2008) Mol Cell 32: 259-275

  • DOI: https://doi.org/10.1016/j.molcel.2008.10.002
  • Primary Citation of Related Structures:  
    2K8Y, 3EN9, 3ENC, 3ENH, 3ENO, 3ENP

  • PubMed Abstract: 

    Kae1 is a universally conserved ATPase and part of the essential gene set in bacteria. In archaea and eukaryotes, Kae1 is embedded within the protein kinase-containing KEOPS complex. Mutation of KEOPS subunits in yeast leads to striking telomere and transcription defects, but the exact biochemical function of KEOPS is not known. As a first step to elucidating its function, we solved the atomic structure of archaea-derived KEOPS complexes involving Kae1, Bud32, Pcc1, and Cgi121 subunits. Our studies suggest that Kae1 is regulated at two levels by the primordial protein kinase Bud32, which is itself regulated by Cgi121. Moreover, Pcc1 appears to function as a dimerization module, perhaps suggesting that KEOPS may be a processive molecular machine. Lastly, as Bud32 lacks the conventional substrate-recognition infrastructure of eukaryotic protein kinases including an activation segment, Bud32 may provide a glimpse of the evolutionary history of the protein kinase family.

  • Organizational Affiliation

    Samuel Lunenfeld Research Institute, Mount Sinai Hospital, 600 University Avenue, Toronto, ON, M5G 1X5, Canada.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
protein PCC1
A, B
87Pyrococcus furiosusMutation(s): 1 
Gene Names: PF2011
Find proteins for Q8TZI1 (Pyrococcus furiosus (strain ATCC 43587 / DSM 3638 / JCM 8422 / Vc1))
Explore Q8TZI1 
Go to UniProtKB:  Q8TZI1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8TZI1
Sequence Annotations
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
Query on MSE
A, B
Experimental Data & Validation

Experimental Data

  • Resolution: 2.63 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.192 
  • Space Group: P 63
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 78.81α = 90
b = 78.81β = 90
c = 60.02γ = 120
Software Package:
Software NamePurpose
CBASSdata collection
XDSdata reduction
XDSdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

  • Released Date: 2008-10-28 
  • Deposition Author(s): Neculai, D.

Revision History  (Full details and data files)

  • Version 1.0: 2008-10-28
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2021-10-20
    Changes: Database references, Derived calculations