Macromolecule Content

• Total Structure Weight: 26.81 kDa 
• Atom Count: 1880 
• Residue Count: 238 
• Unique protein chains: 2

1CEE

SOLUTION STRUCTURE OF CDC42 IN COMPLEX WITH THE GTPASE BINDING DOMAIN OF WASP

• DOI: 10.2210/pdb1CEE/pdb

• Classification: Structural protein Regulation
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 1999-03-08 Released: 1999-06-30 
• Deposition Author(s): Abdul-Manan, N., Aghazadeh, B., Liu, G.A., Majumdar, A., Ouerfelli, O., Rosen, M.K.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 80 
• Conformers Submitted: 20 
• Selection Criteria: LEAST RESTRAINT VIOLATION 

Literature

Structure of Cdc42 in complex with the GTPase-binding domain of the 'Wiskott-Aldrich syndrome' protein.

Abdul-Manan, N., Aghazadeh, B., Liu, G.A., Majumdar, A., Ouerfelli, O., Siminovitch, K.A., Rosen, M.K.

(1999) Nature 399: 379-383

• PubMed: 10360578 
• DOI: 10.1038/20726
• Structures With Same Primary Citation


• PubMed Abstract: 
  

The Rho-family GTP-hydrolysing proteins (GTPases), Cdc42, Rac and Rho, act as molecular switches in signalling pathways that regulate cytoskeletal architecture, gene expression and progression of the cell cycle. Cdc42 and Rac transmit many signals through GTP-dependent binding to effector proteins containing a Cdc42/Rac-interactive-binding (CRIB) motif. One such effector, the Wiskott-Aldrich syndrome protein (WASP), is postulated to link activation of Cdc42 directly to the rearrangement of actin. Human mutations in WASP cause severe defects in haematopoletic cell function, leading to clinical symptoms of thrombocytopenia, immunodeficiency and eczema. Here we report the solution structure of a complex between activated Cdc42 and a minimal GTPase-binding domain (GBD) from WASP. An extended amino-terminal GBD peptide that includes the CRIB motif contacts the switch I, beta2 and alpha5 regions of Cdc42. A carboxy-terminal beta-hairpin and alpha-helix pack against switch II. The Phe-X-His-X2-His portion of the CRIB motif and the alpha-helix appear to mediate sensitivity to the nucleotide switch through contacts to residues 36-40 of Cdc42. Discrimination between the Rho-family members is likely to be governed by GBD contacts to the switch I and alpha5 regions of the GTPases. Structural and biochemical data suggest that GBD-sequence divergence outside the CRIB motif may reflect additional regulatory interactions with functional domains that are specific to individual effectors.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
GTP-BINDING RHO-LIKE PROTEIN	A	179	Homo sapiens	Mutation(s): 0  Gene Names: CDC42 EC: 3.6.5.2
Find proteins for P60953 (Homo sapiens) Explore P60953  Go to UniProtKB:  P60953
NIH Common Fund Data Resources
PHAROS  P60953 GTEx  ENSG00000070831

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
WISKOTT-ALDRICH SYNDROME PROTEIN WASP	B	59	Homo sapiens	Mutation(s): 0  Gene Names: WAS, IMD2
Find proteins for P42768 (Homo sapiens) Explore P42768  Go to UniProtKB:  P42768
NIH Common Fund Data Resources
PHAROS  P42768 GTEx  ENSG00000015285

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GCP	A	PHOSPHOMETHYLPHOSPHONIC ACID GUANYLATE ESTER C11 H18 N5 O13 P3 PHBDHXOBFUBCJD-KQYNXXCUSA-N
MG	A	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 80 
• Conformers Submitted: 20 
• Selection Criteria: LEAST RESTRAINT VIOLATION 
• OLDERADO: 1CEE Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1999-03-08 
• Released Date: 1999-06-30 
Deposition Author(s): Abdul-Manan, N., Aghazadeh, B., Liu, G.A., Majumdar, A., Ouerfelli, O., Rosen, M.K.

Revision History 

• Version 1.0: 1999-06-30
  Type: Initial release
  
• Version 1.1: 2008-04-26
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance