Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

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

Macromolecule Content

• Total Structure Weight: 28.19 kDa 
• Atom Count: 2032 
• Modelled Residue Count: 226 
• Deposited Residue Count: 249 
• Unique protein chains: 2

3O8I

Structure of 14-3-3 isoform sigma in complex with a C-Raf1 peptide and a stabilizing small molecule fragment

• DOI: 10.2210/pdb3O8I/pdb

• Classification: PEPTIDE BINDING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2010-08-03 Released: 2010-09-29 
• Deposition Author(s): Ottmann, C., Rose, R., Kaiser, M., Kuhenne, P.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.239 
• R-Value Work: 0.185 
• R-Value Observed: 0.188 

Literature

Impaired Binding of 14-3-3 to C-RAF in Noonan Syndrome Suggests New Approaches in Diseases with Increased Ras Signaling

Molzan, M., Schumacher, B., Ottmann, C., Baljuls, A., Polzien, L., Weyand, M., Thiel, P., Rose, R., Rose, M., Kuhenne, P., Kaiser, M., Rapp, U.R., Kuhlmann, J., Ottmann, C.

(2010) Mol Cell Biol 30: 4698-4711

• PubMed: 20679480 
• DOI: 10.1128/MCB.01636-09
• Primary Citation of Related Structures:  
  3CU8, 3NKX, 3O8I, 3IQU, 3IQV, 3IQJ


• PubMed Abstract: 
  

The Ras-RAF-mitogen-activated protein kinase (Ras-RAF-MAPK) pathway is overactive in many cancers and in some developmental disorders. In one of those disorders, namely, Noonan syndrome, nine activating C-RAF mutations cluster around Ser(259), a regulatory site for inhibition by 14-3-3 proteins. We show that these mutations impair binding of 14-3-3 proteins to C-RAF and alter its subcellular localization by promoting Ras-mediated plasma membrane recruitment of C-RAF. By presenting biophysical binding data, the 14-3-3/C-RAFpS(259) crystal structure, and cellular analyses, we indicate a mechanistic link between a well-described human developmental disorder and the impairment of a 14-3-3/target protein interaction. As a broader implication of these findings, modulating the C-RAFSer(259)/14-3-3 protein-protein interaction with a stabilizing small molecule may yield a novel potential approach for treatment of diseases resulting from an overactive Ras-RAF-MAPK pathway.

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Organizational Affiliation: 

Chemical Genomics Centre of the Max Planck Society, Otto-Hahn-Strasse 15, 44227 Dortmund, Germany.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
14-3-3 protein sigma	A	239	Homo sapiens	Mutation(s): 0  Gene Names: SFN, HME1
Find proteins for P31947 (Homo sapiens) Explore P31947  Go to UniProtKB:  P31947
NIH Common Fund Data Resources
PHAROS:  P31947 GTEx:  ENSG00000175793

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
14-3-3 binding site peptide of RAF proto-oncogene serine/threonine-protein kinase	B	10	N/A	Mutation(s): 0
Find proteins for P04049 (Homo sapiens) Explore P04049  Go to UniProtKB:  P04049
NIH Common Fund Data Resources
PHAROS:  P04049 GTEx:  ENSG00000132155

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
M1T	C [auth A]	6,6-dihydroxy-1-methoxyhexan-2-one C7 H14 O4 SIDFLZMSYWLVLY-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
SEP	B	L-PEPTIDE LINKING	C3 H8 N O6 P		SER

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.239 
• R-Value Work: 0.185 
• R-Value Observed: 0.188 
• Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 83.31	α = 90
b = 114.86	β = 90
c = 64.93	γ = 90

Software Package:

Software Name	Purpose
XSCALE	data scaling
PHASER	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
ProDC	data collection
XDS	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2010-08-03 
• Released Date: 2010-09-29 
Deposition Author(s): Ottmann, C., Rose, R., Kaiser, M., Kuhenne, P.

Revision History  

• Version 1.0: 2010-09-29
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance