IndraLab

Statements


ELK1 phosphorylated on S383 is active. 9 / 9
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"However, both of these stimuli strongly activate two other mapks, jnk1 and jnk2, and stimulate elk-1 transcriptional activity and phosphorylation jnk phosphorylation sites include ser383 and ser389, the major residues whose phosphorylation is responsible for enhancement of elk-1 trascriptional activity."

"Erki phosphorylates five c-terminal sites in elk-i (s324, t336, s383, s389 and s422) with varying degrees of efficiency."

"Elk-1 is a member of the e-twenty-six (ets) domain superfamily of transcription factors and has been traditionally associated with mitogen-induced immediate early gene transcription upon phosphorylation by mitogen activated protein kinases (erk/mapk)."

"Phosphorylation on ser383 and ser389 of elk-1 by mapk enhances this basal binding but, most importantly, elk-1 exhibits new interactions with p300."

"We demonstrate that elk-1, a protein closely related to p62tcf in function, is a nuclear target of two members of the map kinase family, erk1 and erk2, erk1 phosphorylates five c-terminal sites in elk-1 (s324,t336, s383, s389 and s422) with varying degrees of efficiency."

"Transfection studies demonstrated that TAO2 stimulates phosphorylation of the TCF Elk1 on the major activating site, Ser383, and that TAO2 stimulates transactivation of Elk1 and the related TCF, Sap1."

"Erki phosphorylates five c-terminal sites in elk-i (s324, t336, s383, s389 and s422) with varying degrees of efficiency."

"Subsequent studies with dominant negative elk-1, wild type, and variant gal4-elk-1 fusion proteins confirmed that phosphorylation of elk-1 at serines 383 and 389 in the c-terminal region of elk-1 is an important downstream target associated with activation of an sre by e2. Both e2 (er?-Dependent) and growth factors (er?-Independent) activated the sre in breast cancer cells via the ras/mapk pathway"

"We demonstrate here that elk-1 is barely activated by a third subclass of map kinases (p38), most likely because the critical residues ser383 and ser389 are poorly phosphorylated by p38 map kinase."