Biological Assembly 1  

 3D View: Structure | Ligand Interaction

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - ABC 

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

Macromolecule Content

• Total Structure Weight: 73990.20 
• Atom Count: 4985 
• Residue Count: 642 
• Unique protein chains: 3

1JSU

P27(KIP1)/CYCLIN A/CDK2 COMPLEX

• DOI: 10.2210/pdb1JSU/pdb

• Classification: COMPLEX (TRANSFERASE/CYCLIN/INHIBITOR)
• Organism(s): Homo sapiens
• Expression System: Spodoptera frugiperda, Escherichia coli


• Deposited: 1996-07-03 Released: 1997-07-29 
• Deposition Author(s): Russo, A.A., Jeffrey, P.D., Pavletich, N.P.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.3 Å
• R-Value Free: 0.260 
• R-Value Work: 0.192 

Literature

Crystal structure of the p27Kip1 cyclin-dependent-kinase inhibitor bound to the cyclin A-Cdk2 complex.

Russo, A.A., Jeffrey, P.D., Patten, A.K., Massague, J., Pavletich, N.P.

(1996) Nature 382: 325-331

• PubMed: 8684460 
• DOI: 10.1038/382325a0


• PubMed Abstract: 
  

The crystal structure of the human p27Kip1 kinase inhibitory domain bound to the phosphorylated cyclin A-cyclin-dependent kinase 2 (Cdk2) complex has been determined at 2.3 angstrom. p27Kip1 binds the complex as an extended structure interacting with both cyclin A and Cdk2. On cyclin A, it binds in a groove formed by conserved cyclin box residues. On Cdk2, it binds and rearranges the amino-terminal lobe and also inserts into the catalytic cleft, mimicking ATP.

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Organizational Affiliation: 

Cellular Biochemistry and Biophysics Program, Howard Hughes Medical Institute, Memorial Sloan-Kettering Cancer Center, New York 10021, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
CYCLIN-DEPENDENT KINASE-2	A	298	Homo sapiens	Mutation(s): 0  Gene Names: CDK2 (CDKN2) EC: 2.7.11.22
Find proteins for P24941 (Homo sapiens) Go to Gene View: CDK2 Go to UniProtKB:  P24941

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
CYCLIN A	B	260	Homo sapiens	Mutation(s): 0  Gene Names: CCNA2 (CCN1, CCNA)
Find proteins for P20248 (Homo sapiens) Go to Gene View: CCNA2 Go to UniProtKB:  P20248

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details
P27	C	84	Homo sapiens	Mutation(s): 0  Gene Names: CDKN1B (KIP1)
Find proteins for P46527 (Homo sapiens) Go to Gene View: CDKN1B Go to UniProtKB:  P46527

Small Molecules

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

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
TPO	A	L-PEPTIDE LINKING	C4 H10 N O6 P		THR

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.3 Å
• R-Value Free: 0.260 
• R-Value Work: 0.192 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 73.800	α = 90.00
b = 78.300	β = 90.00
c = 137.200	γ = 90.00

Software Package:

Software Name	Purpose
HKL	data reduction
TNT	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1996-07-03 
• Released Date: 1997-07-29 
• Deposition Author(s): Russo, A.A., Jeffrey, P.D., Pavletich, N.P.

Revision History 

• Version 1.0: 1997-07-29
  Type: Initial release
• Version 1.1: 2008-03-03
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance