PMID: 16626293Apr 22, 2006Paper

Convergence of the SUMO and MAPK pathways on the ETS-domain transcription factor Elk-1

Biochemical Society Symposium
Shen-Hsi Yang, Andrew D Sharrocks

Abstract

The ETS-domain transcription factor Elk-1 is regulated by phosphorylation in response to activation of the MAPK (mitogen-activated protein kinase) pathways. This phosphorylation triggers a series of molecular events that convert Elk-1 from a transcriptionally silent state into a highly active state and then back to a basal level. At the same time, activation of the ERK (extracellular-signal-regulated kinase) MAPK pathway leads to loss of modification of Elk-1 by SUMO (small ubiquitin-related modifier). As SUMO imparts repressive properties on Elk-1, ERK-mediated SUMO loss leads to de-repression at the same time as the ERK pathway promotes activation of Elk-1. Thus a two-step mechanism is employed to convert Elk-1 into its fully activated state. Here, the molecular events underlying these changes in Elk-1 status, and the role of PIASxalpha [protein inhibitor of activated STAT (signal transducer and activator of transcription) xalpha] as a co-activator that facilitates this process, are discussed.

Citations

Jul 18, 2009·Purinergic Signalling·Lingyin ZhouGeorge I Gorodeski
Aug 4, 2010·Molecular Biology Reports·Dongxia HaoXiujun Zhang
Jan 21, 2012·Biochemical Society Transactions·Amanda O'DonnellAndrew D Sharrocks
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