9O2Z | pdb_00009o2z

Autoinhibited BRAF:(14-3-3)2:MEK complex from Insect cells

• PDB DOI: https://doi.org/10.2210/pdb9O2Z/pdb
• EM Map EMD-70053: EMDB EMDataResource

• Classification: SIGNALING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Trichoplusia ni
• Mutation(s): No 


• Deposited: 2025-04-04 Released: 2025-09-10 
• Deposition Author(s): Martinez Fiesco, J.A., Zhang, P.
• Funding Organization(s): National Institutes of Health/National Cancer Institute (NIH/NCI)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.83 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Autoinhibited BRAF:(14-3-3)2:MEK complex from Insect cells

Martinez Fiesco, J.A., Zhang, P.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 4-mer - A2B1C1 Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Hetero 4-mer - A2B2 Local Symmetry: Cyclic - C2  (Explore in 3D)
Local Stoichiometry: Homo 2-mer - A2 

Local Symmetry: Cyclic - C2  (Explore in 3D)
Local Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 184.35 kDa 
• Atom Count: 9,141 
• Modeled Residue Count: 1,149 
• Deposited Residue Count: 1,649 
• Unique protein chains: 3

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Serine/threonine-protein kinase B-raf	A	766	Homo sapiens	Mutation(s): 0  Gene Names: BRAF, BRAF1, RAFB1 EC: 2.7.11.1
UniProt & NIH Common Fund Data Resources
Find proteins for P15056 (Homo sapiens) Explore P15056  Go to UniProtKB:  P15056
PHAROS:  P15056 GTEx:  ENSG00000157764

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Dual specificity mitogen-activated protein kinase kinase 1	B	393	Homo sapiens	Mutation(s): 0  Gene Names: MAP2K1, MEK1, PRKMK1 EC: 2.7.12.2
UniProt & NIH Common Fund Data Resources
Find proteins for Q02750 (Homo sapiens) Explore Q02750  Go to UniProtKB:  Q02750
PHAROS:  Q02750 GTEx:  ENSG00000169032

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
14-3-3 protein zeta/delta	C, D	245	Homo sapiens	Mutation(s): 0  Gene Names: YWHAZ
UniProt & NIH Common Fund Data Resources
Find proteins for P63104 (Homo sapiens) Explore P63104  Go to UniProtKB:  P63104
PHAROS:  P63104 GTEx:  ENSG00000164924

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CHU (Subject of Investigation/LOI)	G [auth B]	N-(3-fluoro-4-{[4-methyl-2-oxo-7-(pyrimidin-2-yloxy)-2H-chromen-3-yl]methyl}pyridin-2-yl)-N'-methylsulfuric diamide C21 H18 F N5 O5 S LMMJFBMMJUMSJS-UHFFFAOYSA-N
ZN	E [auth A], F [auth A]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

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

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.83 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX	1.21.1_5286

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-09-10 
Deposition Author(s): Martinez Fiesco, J.A., Zhang, P.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Cancer Institute (NIH/NCI)	United States	--

Revision History  

• Version 1.0: 2025-09-10
  Type: Initial release