FEATURES

FAMILY

DESCRIPTION

Also known as 4EBP1_HUMAN, EIF4EBP1. Repressor of translation initiation that regulates EIF4E activity by preventing its assembly into the eIF4F complex: hypophosphorylated form competes with EIF4G1/EIF4G3 and strongly binds to EIF4E, leading to repress translation. In contrast, hyperphosphorylated form dissociates from EIF4E, allowing interaction between EIF4G1/EIF4G3 and EIF4E, leading to initiation of translation. Mediates the regulation of protein translation by hormones, growth factors and other stimuli that signal through the MAP kinase and mTORC1 pathways. Hypophosphorylated EIF4EBP1 competes with EIF4G1/EIF4G3 to interact with EIF4E; insulin stimulated MAP-kinase (MAPK1 and MAPK3) or mTORC1 phosphorylation of EIF4EBP1 causes dissociation of the complex allowing EIF4G1/EIF4G3 to bind and consequent initiation of translation (PubMed:12150926, PubMed:16271312, PubMed:17368478, PubMed:17631896, PubMed:22578813, PubMed:7935836, PubMed:8521827, PubMed:25702871). Interacts (via TOS motif) with RPTOR; promoting phosphorylation by mTORC1 (PubMed:12747827).

EXTERNAL LINKS

EIF4EBP1

Eukaryotic translation initiation factor 4E-binding protein 1

EIF4EBP1

Molecular Synopsis