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EIF4EBP1

This gene encodes one member of a family of translation repressor proteins. The protein directly interacts with eukaryotic translation initiation factor 4E (eIF4E), which is a limiting component of the multisubunit complex that recruits 40S ribosomal subunits to the 5' end of mRNAs. Interaction of this protein with eIF4E inhibits complex assembly and represses translation. This protein is phosphorylated in response to various signals including UV irradiation and insulin signaling, resulting in its dissociation from eIF4E and activation of mRNA translation.
Protein class

Cancer-related genes

Predicted location

Intracellular

Single cell type specificity

Cell type enhanced (Exocrine glandular cells, Pancreatic endocrine cells)

Immune cell specificity

Low immune cell specificity

Cell line specificity

Low cell line specificity

Interaction

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).

Molecular function

Protein synthesis inhibitor

More Types Infomation

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