Biological Assembly 1  

 3D View: Structure

Standalone Viewers  
Protein Workshop | Ligand Explorer

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 19010.98 
• Atom Count: 1335 
• Residue Count: 161 
• Unique protein chains: 1

1C25

HUMAN CDC25A CATALYTIC DOMAIN

• DOI: 10.2210/pdb1C25/pdb

• Classification: HYDROLASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)


• Deposited: 1998-04-17 Released: 1998-08-19 
• Deposition Author(s): Fauman, E.B., Cogswell, J.P., Lovejoy, B., Rocque, W.J., Holmes, W., Montana, V.G., Piwnica-Worms, H., Rink, M.J., Saper, M.A.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.3 Å
• R-Value Free: 0.296 
• R-Value Work: 0.227 

Literature

Crystal structure of the catalytic domain of the human cell cycle control phosphatase, Cdc25A.

Fauman, E.B., Cogswell, J.P., Lovejoy, B., Rocque, W.J., Holmes, W., Montana, V.G., Piwnica-Worms, H., Rink, M.J., Saper, M.A.

(1998) Cell 93: 617-625

• PubMed: 9604936 


• PubMed Abstract: 
  

Cdc25 phosphatases activate the cell division kinases throughout the cell cycle. The 2.3 A structure of the human Cdc25A catalytic domain reveals a small alpha/beta domain with a fold unlike previously described phosphatase structures but identical to rhodanese, a sulfur-transfer protein. Only the active-site loop, containing the Cys-(X)5-Arg motif, shows similarity to the tyrosine phosphatases. In some crystals, the catalytic Cys-430 forms a disulfide bond with the invariant Cys-384, suggesting that Cdc25 may be self-inhibited during oxidative stress. Asp-383, previously proposed to be the general acid, instead serves a structural role, forming a conserved buried salt-bridge. We propose that Glu-431 may act as a general acid. Structure-based alignments suggest that the noncatalytic domain of the MAP kinase phosphatases will share this topology, as will ACR2, a eukaryotic arsenical resistance protein.

---

Organizational Affiliation: 

Department of Biological Chemistry, The University of Michigan, Ann Arbor 48109-1055, USA. [e-mail]

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
CDC25A	A	161	Homo sapiens	Mutation(s): 0  Gene Names: CDC25A EC: 3.1.3.48
Find proteins for P30304 (Homo sapiens) Go to Gene View: CDC25A Go to UniProtKB:  P30304

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.3 Å
• R-Value Free: 0.296 
• R-Value Work: 0.227 
• Space Group: P 4₁

Unit Cell:

Length (Å)	Angle (°)
a = 43.507	α = 90.00
b = 43.507	β = 90.00
c = 117.096	γ = 90.00

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1998-04-17 
• Released Date: 1998-08-19 
• Deposition Author(s): Fauman, E.B., Cogswell, J.P., Lovejoy, B., Rocque, W.J., Holmes, W., Montana, V.G., Piwnica-Worms, H., Rink, M.J., Saper, M.A.

Revision History 

• Version 1.0: 1998-08-19
  Type: Initial release
• Version 1.1: 2008-03-24
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance