1DKS

CKSHS1: HUMAN CYCLIN DEPENDENT KINASE SUBUNIT, TYPE 1 IN COMPLEX WITH PHOSPHATE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.290 
  • R-Value Work: 0.183 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Crystal structure of the human cell cycle protein CksHs1: single domain fold with similarity to kinase N-lobe domain.

Arvai, A.S.Bourne, Y.Hickey, M.J.Tainer, J.A.

(1995) J.Mol.Biol. 249: 835-842

  • DOI: 10.1006/jmbi.1995.0341
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The structure of the human CksHs1 homolog of the yeast cell-cycle regulatory proteins suc1 and CKS1, which bind to the catalytic subunit of the cyclin-dependent kinases (Cdks) and are essential for yeast cell-cycle progression in vivo, has been deter ...

    The structure of the human CksHs1 homolog of the yeast cell-cycle regulatory proteins suc1 and CKS1, which bind to the catalytic subunit of the cyclin-dependent kinases (Cdks) and are essential for yeast cell-cycle progression in vivo, has been determined at 2.9 A resolution. The CksHs1 single polypeptide domain fold, which consists of a four-stranded beta-sheet flanked by two alpha-helices, is dramatically different from the subunit conformation and assembly of the homologous CksHs2, but strikingly similar to the Cdk N-lobe domain fold. The CksHs1 structure identifies sequence-conserved residues Glu61 to His65 as a novel beta-hinge region that folds back to form a beta-hairpin with CksHs1 subunit, whereas this hinge is unfolded to form an extended beta-strand exchange between two CksHs2 subunits. Phosphate and the phosphate analog metavanadate bind CksHs1 in a shallow pocket and interact with five conserved residues (Lys11, Arg20, Ser51, Trp54 and Arg71) suggesting a specific Cks recognition site for a phosphorylated Cdk residue. The dramatic changes to the Cks fold, assembly and exposed conserved surface brought about by switching between the bent and extended hinge conformations are potentially important for the functions of this Cks homolog and could explain conflicting activities inferred from different types of genetic experiments.


    Related Citations: 
    • Crystallization and Preliminary Crystallographic Study of Human Ckshs1: A Cell Cycle Regulatory Protein
      Arvai, A.S.,Bourne, Y.,Williams, D.,Reed, S.I.,Tainer, J.A.
      (1995) Proteins 21: 70


    Organizational Affiliation

    Department of Molecular Biology, Scripps Research Institute, La Jolla, CA 92037, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CYCLIN DEPENDENT KINASE SUBUNIT, TYPE 1
A, B
79Homo sapiensGene Names: CKS1B (CKS1)
Find proteins for P61024 (Homo sapiens)
Go to Gene View: CKS1B
Go to UniProtKB:  P61024
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
A, B
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.290 
  • R-Value Work: 0.183 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 94.000α = 90.00
b = 94.000β = 90.00
c = 137.400γ = 120.00
Software Package:
Software NamePurpose
X-PLORphasing
XDSdata reduction
X-PLORrefinement
X-PLORmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1996-03-08
    Type: Initial release
  • Version 1.1: 2008-03-03
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-11-29
    Type: Derived calculations, Other