Biological Assembly 1  

 3D View: Structure | Electron Density

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

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

Biological Assembly 2  

 3D View: Structure | Electron Density

Standalone Viewers  
Protein Workshop | Ligand Explorer

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

Biological assembly 2 assigned by authors and generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 100764.27 
• Atom Count: 6868 
• Residue Count: 878 
• Unique protein chains: 2

1H4L

Structure and regulation of the CDK5-p25(nck5a) complex

• DOI: 10.2210/pdb1H4L/pdb

• Classification: KINASE/KINASE ACTIVATOR
• Organism(s): Homo sapiens
• Expression System: Spodoptera frugiperda


• Deposited: 2001-05-11 Released: 2002-08-14 
• Deposition Author(s): Tarricone, C., Dhavan, R., Peng, J., Areces, L.B., Tsai, L.-H., Musacchio, A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.65 Å
• R-Value Free: 0.287 
• R-Value Work: 0.236 

Literature

Structure and Regulation of the Cdk5-P25(Nck5A) Complex

Tarricone, C., Dhavan, R., Peng, J., Areces, L.B., Tsai, L.-H., Musacchio, A.

(2001) Mol.Cell 8: 657

• PubMed: 11583627 


• PubMed Abstract: 
  

CDK5 plays an indispensable role in the central nervous system, and its deregulation is involved in neurodegeneration. We report the crystal structure of a complex between CDK5 and p25, a fragment of the p35 activator. Despite its partial structural similarity with the cyclins, p25 displays an unprecedented mechanism for the regulation of a cyclin-dependent kinase. p25 tethers the unphosphorylated T loop of CDK5 in the active conformation. Residue Ser159, equivalent to Thr160 on CDK2, contributes to the specificity of the CDK5-p35 interaction. Its substitution with threonine prevents p35 binding, while the presence of alanine affects neither binding nor kinase activity. Finally, we provide evidence that the CDK5-p25 complex employs a distinct mechanism from the phospho-CDK2-cyclin A complex to establish substrate specificity.

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Organizational Affiliation: 

Structural Biology Unit, Department of Experimental Oncology, European Institute of Oncology, Via Ripamonti 435, I-20141 Milan, Italy.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
CELL DIVISION PROTEIN KINASE 5	A, B	292	Homo sapiens	Mutation(s): 0  Gene Names: CDK5 (CDKN5) EC: 2.7.11.1
Find proteins for Q00535 (Homo sapiens) Go to Gene View: CDK5 Go to UniProtKB:  Q00535

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
CYCLIN-DEPENDENT KINASE 5 ACTIVATOR	D, E	147	Homo sapiens	Mutation(s): 0  Gene Names: CDK5R1 (CDK5R, NCK5A)
Find proteins for Q15078 (Homo sapiens) Go to Gene View: CDK5R1 Go to UniProtKB:  Q15078

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.65 Å
• R-Value Free: 0.287 
• R-Value Work: 0.236 
• Space Group: C 1 2 1

Unit Cell:

Length (Å)	Angle (°)
a = 149.090	α = 90.00
b = 89.760	β = 93.08
c = 82.570	γ = 90.00

Software Package:

Software Name	Purpose
CNS	refinement
DENZO	data reduction
AMoRE	phasing
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2001-05-11 
• Released Date: 2002-08-14 
• Deposition Author(s): Tarricone, C., Dhavan, R., Peng, J., Areces, L.B., Tsai, L.-H., Musacchio, A.

Revision History 

• Version 1.0: 2002-08-14
  Type: Initial release
• Version 1.1: 2011-05-08
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance