Biological Assembly 1  

 3D View: Structure | Ligand Interaction

Global Symmetry: Dihedral - D3  (3D View)
Global Stoichiometry: Homo 6-mer - A6 

Biological assembly 1 assigned by authors and generated by PISA,PQS (software)

Macromolecule Content

• Total Structure Weight: 29.93 kDa 
• Atom Count: 2270 
• Residue Count: 230 
• Unique protein chains: 1

1CKS

HUMAN CKSHS2 ATOMIC STRUCTURE: A ROLE FOR ITS HEXAMERIC ASSEMBLY IN CELL CYCLE CONTROL

• DOI: 10.2210/pdb1CKS/pdb

• Classification: CELL DIVISION
• Organism(s): Homo sapiens
• Mutation(s): No 


• Deposited: 1993-09-16 Released: 1995-02-07 
• Deposition Author(s): Parge, H.E., Arvai, A.S., Tainer, J.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Work: 0.168 
• R-Value Observed: 0.168 

Literature

Human CksHs2 atomic structure: a role for its hexameric assembly in cell cycle control.

Parge, H.E., Arvai, A.S., Murtari, D.J., Reed, S.I., Tainer, J.A.

(1993) Science 262: 387-395

• PubMed: 8211159 
• DOI: 10.1126/science.8211159
• Primary Citation of Related Structures:  
  1CKS


• PubMed Abstract: 
  

The cell cycle regulatory protein CksHs2 binds to the catalytic subunit of the cyclin-dependent kinases (Cdk's) and is essential for their biological function. The crystal structure of the protein was determined at 2.1 A resolution. The CksHs2 structure is an unexpected hexamer formed by the symmetric assembly of three interlocked dimers into an unusual 12-stranded beta barrel fold that may represent a prototype for this class of protein structures. Sequence-conserved regions form the unusual beta strand exchange between the subunits of the dimer, and the metal and anion binding sites associated with the hexamer assembly. The two other sequence-conserved regions line a 12 A diameter tunnel through the beta barrel and form the six exposed, charged helix pairs. Six kinase subunits can be modeled to bind the assembled hexamer without collision, and therefore this CksHs2 hexamer may participate in cell cycle control by acting as the hub for Cdk multimerization in vivo.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CYCLIN-DEPENDENT KINASE SUBUNIT, TYPE 2	A, B, C	79	Homo sapiens	Mutation(s): 0  Gene Names: CKS2
Find proteins for P33552 (Homo sapiens) Explore P33552  Go to UniProtKB:  P33552
NIH Common Fund Data Resources
PHAROS:  P33552 GTEx:  ENSG00000123975

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	A, B, C	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Work: 0.168 
• R-Value Observed: 0.168 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 100.1	α = 90
b = 57.6	β = 117.4
c = 51.1	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1993-09-16 
• Released Date: 1995-02-07 
Deposition Author(s): Parge, H.E., Arvai, A.S., Tainer, J.A.

Revision History 

• Version 1.0: 1995-02-07
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Derived calculations, Version format compliance
• Version 1.3: 2017-11-29
  Changes: Derived calculations, Other