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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Parker, Sirlester A. Dalby, Kevin N. Sheridan, Douglas L. Kong, Yong Turk, Benjamin E. |
| Description | Author Affiliation: Sheridan DL ( Department of Pharmacology, Yale University School of Medicine, New Haven, Connecticut 06520, USA.) |
| Abstract | Mitogen-activated protein kinases (MAPKs) mediate cellular responses to a wide variety of extracellular stimuli. MAPK signal transduction cascades are tightly regulated, and individual MAPKs display exquisite specificity in recognition of their target substrates. All MAPK family members share a common phosphorylation site motif, raising questions as to how substrate specificity is achieved. Here we describe a peptide library screen to identify sequence requirements of the DEF site (docking site for ERK FXF), a docking motif separate from the phosphorylation site. We show that MAPK isoforms recognize DEF sites with unique sequences and identify two key residues on the MAPK that largely dictate sequence specificity. Based on these observations and computational docking studies, we propose a revised model for MAPK interaction with substrates containing DEF sites. Variations in DEF site sequence requirements provide one possible mechanism for encoding complex target specificity among MAPK isoforms. |
| ISSN | 00219258 |
| e-ISSN | 1083351X |
| Journal | Journal of Biological Chemistry |
| Issue Number | 28 |
| Volume Number | 283 |
| Language | English |
| Publisher | American Society for Biochemistry and Molecular Biology (United States) |
| Publisher Date | 2008-07-11 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Extracellular Signal-Regulated MAP Kinases Metabolism MAP Kinase Signaling System Physiology Amino Acid Motifs Animals Chemistry Genetics Isoenzymes Mice NIH 3T3 Cells Phosphorylation Substrate Specificity Research Support, N.I.H., Extramural Research Support, Non-U.S. Gov't Biochemistry Molecular Biology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Biochemistry Molecular Biology |
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