Macromolecule Content

• Total Structure Weight: 25.83 kDa 
• Atom Count: 1813 
• Modelled Residue Count: 228 
• Deposited Residue Count: 228 
• Unique protein chains: 2

1CF4

CDC42/ACK GTPASE-BINDING DOMAIN COMPLEX

• DOI: 10.2210/pdb1CF4/pdb
• BMRB: 4700

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


• Deposited: 1999-03-23 Released: 1999-06-18 
• Deposition Author(s): Mott, H.R., Owen, D., Nietlispach, D., Lowe, P.N., Lim, L., Laue, E.D.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: LOWEST ENERGY 

Literature

Structure of the small G protein Cdc42 bound to the GTPase-binding domain of ACK.

Mott, H.R., Owen, D., Nietlispach, D., Lowe, P.N., Manser, E., Lim, L., Laue, E.D.

(1999) Nature 399: 384-388

• PubMed: 10360579 
• DOI: 10.1038/20732
• Primary Citation of Related Structures:  
  1CF4


• PubMed Abstract: 
  

The proteins Cdc42 and Rac are members of the Rho family of small GTPases (G proteins), which control signal-transduction pathways that lead to rearrangements of the cell cytoskeleton, cell differentiation and cell proliferation. They do so by binding to downstream effector proteins. Some of these, known as CRIB (for Cdc42/Rac interactive-binding) proteins, bind to both Cdc42 and Rac, such as the PAK1-3 serine/threonine kinases, whereas others are specific for Cdc42, such as the ACK tyrosine kinases and the Wiscott-Aldrich-syndrome proteins (WASPs). The effector loop of Cdc42 and Rac (comprising residues 30-40, also called switch I), is one of two regions which change conformation on exchange of GDP for GTP. This region is almost identical in Cdc42 and Racs, indicating that it does not determine the specificity of these G proteins. Here we report the solution structure of the complex of Cdc42 with the GTPase-binding domain ofACK. Both proteins undergo significant conformational changes on binding, to form a new type of G-protein/effector complex. The interaction extends the beta-sheet in Cdc42 by binding an extended strand from ACK, as seen in Ras/effector interactions, but it also involves other regions of the G protein that are important for determining the specificity of effector binding.

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Organizational Affiliation: 

Cambridge Centre for Molecular Recognition, Department of Biochemistry, University of Cambridge, UK.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN (CDC42 HOMOLOG)	A	184	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	Image
PROTEIN (ACTIVATED P21CDC42HS KINASE)	B	44	Homo sapiens	Mutation(s): 0  Gene Names: TNK2, ACK1 EC: 2.7.10.2 (UniProt), 2.7.11.1 (UniProt)
Find proteins for Q07912 (Homo sapiens) Explore Q07912  Go to UniProtKB:  Q07912
NIH Common Fund Data Resources
PHAROS:  Q07912 GTEx:  ENSG00000061938

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GNP	A	PHOSPHOAMINOPHOSPHONIC ACID-GUANYLATE ESTER C10 H17 N6 O13 P3 UQABYHGXWYXDTK-UUOKFMHZSA-N
MG	A	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: LOWEST ENERGY 
• OLDERADO: 1CF4 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1999-03-23 
• Released Date: 1999-06-18 
Deposition Author(s): Mott, H.R., Owen, D., Nietlispach, D., Lowe, P.N., Lim, L., Laue, E.D.

Revision History  

• Version 1.0: 1999-06-18
  Type: Initial release
  
• Version 1.1: 2008-04-26
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance