ISDA

Deposition Date 2004-02-04

Release Date 2004-11-23

Last Version Date 2024-04-03

Entry Detail

PDB ID:

1S9I

Keywords:

TRANSFERASE

Title:

X-ray structure of the human mitogen-activated protein kinase kinase 2 (MEK2)in a complex with ligand and MgATP

Biological Source:

Source Organism:

Homo sapiens (Taxon ID: 9606)

Host Organism:

Escherichia coli BL21(DE3)

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

3.20 Å

R-Value Free:

0.36

R-Value Work:

0.29

R-Value Observed:

0.29

Space Group:

P 61 2 2

Download Validation Report

Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Dual specificity mitogen-activated protein kinase kinase 2
Gene (Uniprot):MAP2K2
Chain IDs:A, B
Chain Length:354
Number of Molecules:2
Biological Source:Homo sapiens

UniProt ID:P36507 Pfam ID:PF00069 EC:2.7.12.2

Ligand Molecules

5EA

ATP

Primary Citation

Structures of human MAP kinase kinase 1 (MEK1) and MEK2 describe novel noncompetitive kinase inhibition.

Ohren, J.F, Chen, H, Pavlovsky, A, Whitehead, C, Zhang, E, Kuffa, P, Yan, C, McConnell, P, Spessard, C, Banotai, C, Mueller, W.T, Delaney, A, Omer, C, Sebolt-Leopold, J, Dudley, D.T, Leung, I.K, Flamme, C, Warmus, J, Kaufman, M, Barrett, S, Tecle, H, Hasemann, C.A.Show

Nat.Struct.Mol.Biol. 11 1192 1197 (2004)

PMID: 15543157 DOI: 10.1038/nsmb859

Abstact

MEK1 and MEK2 are closely related, dual-specificity tyrosine/threonine protein kinases found in the Ras/Raf/MEK/ERK mitogen-activated protein kinase (MAPK) signaling pathway. Approximately 30% of all human cancers have a constitutively activated MAPK pathway, and constitutive activation of MEK1 results in cellular transformation. Here we present the X-ray structures of human MEK1 and MEK2, each determined as a ternary complex with MgATP and an inhibitor to a resolution of 2.4 A and 3.2 A, respectively. The structures reveal that MEK1 and MEK2 each have a unique inhibitor-binding pocket adjacent to the MgATP-binding site. The presence of the potent inhibitor induces several conformational changes in the unphosphorylated MEK1 and MEK2 enzymes that lock them into a closed but catalytically inactive species. Thus, the structures reported here reveal a novel, noncompetitive mechanism for protein kinase inhibition.

Legend

Protein

Chemical

Disease

Primary Citation of related structures