Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 37.74 kDa 
• Atom Count: 2,356 
• Modelled Residue Count: 289 
• Deposited Residue Count: 333 
• Unique protein chains: 1

 2P55

X-ray structure of the human mitogen-activated protein kinase kinase 1 (MEK1) in a complex with ligand and MgATP

• PDB DOI: 10.2210/pdb2P55/pdb

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


• Deposited: 2007-03-14 Released: 2007-10-02 
• Deposition Author(s): Ohren, J.F., Pavlovsky, A.G.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.301 
• R-Value Work: 0.228 

Literature

4-anilino-5-carboxamido-2-pyridone derivatives as noncompetitive inhibitors of mitogen-activated protein kinase kinase.

Spicer, J.A., Rewcastle, G.W., Kaufman, M.D., Black, S.L., Plummer, M.S., Denny, W.A., Quin, J., Shahripour, A.B., Barrett, S.D., Whitehead, C.E., Milbank, J.B., Ohren, J.F., Gowan, R.C., Omer, C., Camp, H.S., Esmaeil, N., Moore, K., Sebolt-Leopold, J.S., Pryzbranowski, S., Merriman, R.L., Ortwine, D.F., Warmus, J.S., Flamme, C.M., Pavlovsky, A.G., Tecle, H.

(2007) J Med Chem 50: 5090-5102

• PubMed: 17880056 
• DOI: 10.1021/jm0704548
• Primary Citation of Related Structures:  
  2P55


• PubMed Abstract: 
  

A new series of MEK1 inhibitors, the 4-anilino-5-carboxamido-2-pyridones, were designed and synthesized using a combination of medicinal chemistry, computational chemistry, and structural elucidation. The effect of variation in the carboxamide side chain, substitution on the pyridone nitrogen, and replacement of the 4'-iodide were all investigated. This study afforded several compounds which were either equipotent or more potent than the clinical candidate CI-1040 (1) in an isolated enzyme assay, as well as murine colon carcinoma (C26) cells, as measured by suppression of phosphorylated ERK substrate. Most notably, pyridone 27 was found to be more potent than 1 in vitro and produced a 100% response rate at a lower dose than 1, when tested for in vivo efficacy in animals bearing C26 tumors.

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Organizational Affiliation: 

Auckland Cancer Society Research Centre, Faculty of Medical and Health Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand. [e-mail]

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Dual specificity mitogen-activated protein kinase kinase 1	A	333	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

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ATP	D [auth A]	ADENOSINE-5'-TRIPHOSPHATE C10 H16 N5 O13 P3 ZKHQWZAMYRWXGA-KQYNXXCUSA-N
MRA	C [auth A]	2-[(4-ETHYNYL-2-FLUOROPHENYL)AMINO]-3,4-DIFLUORO-N-(2-HYDROXYETHOXY)BENZAMIDE C17 H13 F3 N2 O3 AMNKRBRQQAMACZ-UHFFFAOYSA-N
MG	B [auth A]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.301 
• R-Value Work: 0.228 
• Space Group: P 6₂

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 81.634	α = 90
b = 81.634	β = 90
c = 129.086	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2007-10-02 
Deposition Author(s): Ohren, J.F., Pavlovsky, A.G.

Revision History  

• Version 1.0: 2007-10-02
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance