Experimental Data Snapshot

  • Resolution: 1.95 Å
  • R-Value Free: 0.241 
  • R-Value Observed: 0.187 

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Crystal structure of the yeast cell-cycle control protein, p13suc1, in a strand-exchanged dimer.

Khazanovich, N.Bateman, K.Chernaia, M.Michalak, M.James, M.

(1996) Structure 4: 299-309

  • DOI: https://doi.org/10.1016/s0969-2126(96)00034-2
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    p13(suc1) from fission yeast is a member of the CDC28 kinase specific (CKS) class of cell-cycle control proteins, that includes CKS1 from budding yeast and the human homologues CksHs1 and CksHs2. p13(suc1) participates in the regulation of p34(cdc2), a cyclin-dependent kinase controlling the G1-S and the G2-M transitions of the cell cycle. The CKS proteins are believed to exert their regulatory activity by binding to the kinase, in which case their function may be governed by their conformation or oligomerization state. Previously determined X-ray structures of p13(suc1), CksHs1 and CksHs2 show that these proteins share a common fold but adopt different oligomeric states. Monomeric forms of p13(suc1) and CksHs1 have been solved. In addition, CksHs2 and p13(suc1) have been observed by X-ray crystallography in assemblies of strand-exchanged dimers. Analysis of various assemblies of the CKS proteins, as found in different crystal forms, should help to clarify their role in cell-cycle control. We report the X-ray crystal structure of p13(suc1) to 1.95 A resolution in space group C2221. It is present in the crystals as a strand-exchanged dimer. The overall monomeric fold is preserved in each lobe of the dimer but a single beta-strand (Ile94-Asp102) is exchanged between the central beta-sheets of each molecule. Strand exchange, which has been observed for p13(suc1) in two different space groups, and for CksHs2, is now confirmed to be an intrinsic feature of the CKS family. A switch between levels of assembly may serve to coordinate the function of the CKS proteins in cell-cycle control.

  • Organizational Affiliation

    Medical Research Council Group in Protein Structure and Function, University of Alberta, Edmonton, Alberta, Canada T6G 2H7.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
P13SUC1105Schizosaccharomyces pombeMutation(s): 0 
Find proteins for P08463 (Schizosaccharomyces pombe (strain 972 / ATCC 24843))
Explore P08463 
Go to UniProtKB:  P08463
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP08463
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on CPS

Download Ideal Coordinates CCD File 
C32 H58 N2 O7 S
Experimental Data & Validation

Experimental Data

  • Resolution: 1.95 Å
  • R-Value Free: 0.241 
  • R-Value Observed: 0.187 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 43.27α = 90
b = 55.28β = 90
c = 111.8γ = 90
Software Package:
Software NamePurpose
SDMSdata collection
X-PLORmodel building
SDMSdata reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1996-04-03
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-02-14
    Changes: Data collection, Database references, Derived calculations, Other