Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

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

Macromolecule Content

• Total Structure Weight: 43.66 kDa 
• Atom Count: 3043 
• Residue Count: 357 
• Unique protein chains: 2

1BUH

CRYSTAL STRUCTURE OF THE HUMAN CDK2 KINASE COMPLEX WITH CELL CYCLE-REGULATORY PROTEIN CKSHS1

• DOI: 10.2210/pdb1BUH/pdb

• Classification: TRANSFERASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli, Trichoplusia ni
• Mutation(s): No 


• Deposited: 1998-09-03 Released: 1998-09-09 
• Deposition Author(s): Bourne, Y., Tainer, J.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 0.250 
• R-Value Work: 0.190 
• R-Value Observed: 0.190 

Literature

Crystal structure and mutational analysis of the human CDK2 kinase complex with cell cycle-regulatory protein CksHs1.

Bourne, Y., Watson, M.H., Hickey, M.J., Holmes, W., Rocque, W., Reed, S.I., Tainer, J.A.

(1996) Cell 84: 863-874

• PubMed: 8601310 
• DOI: 10.1016/s0092-8674(00)81065-x
• Primary Citation of Related Structures:  
  1BUH


• PubMed Abstract: 
  

The 2.6 Angstrom crystal structure for human cyclin-dependent kinase 2(CDK2) in complex with CksHs1, a human homolog of essential yeast cell cycle-regulatory proteins suc1 and Cks1, reveals that CksHs1 binds via all four beta strands to the kinase C-terminal lobe. This interface is biologically critical, based upon mutational analysis, but far from the CDK2 N-terminal lobe, cyclin, and regulatory phosphorylation sites. CDK2 binds the Cks single domain conformation and interacts with conserved hydrophobic residues plus His-60 and Glu-63 in their closed beta-hinge motif conformation. The beta hinge opening to form the Cks beta-interchanged dimer sterically precludes CDK2 binding, providing a possible mechanism regulating CDK2-Cks interactions. One face of the complex exposes the sequence-conserved phosphate-binding region on Cks and the ATP-binding site on CDK2, suggesting that CKs may target CDK2 to other phosphoproteins during the cell cycle.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN (CKSHS1 HUMAN)	B	79	Homo sapiens	Mutation(s): 0  Gene Names: CKS1B, CKS1, PNAS-143, PNAS-16
Find proteins for P61024 (Homo sapiens) Explore P61024  Go to UniProtKB:  P61024
NIH Common Fund Data Resources
PHAROS  P61024 GTEx  ENSG00000173207

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN (CDK2 HUMAN)	A	298	Homo sapiens	Mutation(s): 0  Gene Names: CDK2, CDKN2 EC: 2.7.11.22
Find proteins for P24941 (Homo sapiens) Explore P24941  Go to UniProtKB:  P24941
NIH Common Fund Data Resources
PHAROS  P24941 GTEx  ENSG00000123374

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 0.250 
• R-Value Work: 0.190 
• R-Value Observed: 0.190 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 56.8	α = 90
b = 69.95	β = 114.5
c = 60.53	γ = 90

Software Package:

Software Name	Purpose
AMoRE	phasing
X-PLOR	refinement
DENZO	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1998-09-03 
• Released Date: 1998-09-09 
Deposition Author(s): Bourne, Y., Tainer, J.A.

Revision History 

• Version 1.0: 1998-09-09
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance