ETS domain-containing protein Elk-1 (ELK1)

ETS domain-containing protein Elk-1 is a member of the ETS family of transcription factors and functions primarily as a regulator of immediate early gene expression by binding purine-rich DNA sequences in association with serum response factor (SRF) at specific promoter elements. Elk-1 is activated through phosphorylation by mitogen-activated protein kinases (MAPKs), notably ERK, JNK, and p38, which triggers conformational changes enabling nuclear translocation, chromatin remodeling, and transcriptional activation. It contains several conserved domains: an N-terminal ETS DNA-binding domain, a B-box for SRF interaction, a D-domain for kinase docking, and a C-terminal transactivation domain with key phosphorylation sites (e.g., S383, S389). In neurons, Elk-1 plays dual roles: promoting apoptosis when localized cytoplasmically and neuronal differentiation when activated in the nucleus. Elk-1's activity is tightly regulated by MAPK-mediated phosphorylation and by repressive interactions involving chromatin modifiers (e.g., histone deacetylases recruited by specialized repression motifs). Elk-1 is implicated in cancer development (through aberrant signaling and transcriptional regulation) as well as in neurodegeneration and brain plasticity. While extensively studied for its role in signal transduction and transcription, ELK1 has not yet been directly targeted by approved therapeutics; however, its activity can be modulated by drugs targeting upstream kinases in the MAPK pathway.

Other names

ELK1ETS transcription factor ELK1ETS domain-containing protein Elk-1ETS-like gene 1ELK1, member of ETS oncogene familyTyrosine kinase (ELK1) oncogene

Drugs affecting Elk-1 usually act by inhibiting upstream kinases (MAPKs such as ERK, JNK, p38), thus preventing phosphorylation and activation of Elk-1.