EIF4G1 Antibody – Rabbit

eIF4G: Component of the protein complex eIF4F, which is involved in the recognition of the mRNA cap, ATP-dependent unwinding of 5'-terminal secondary structure and recruitment of mRNA to the ribosome. eIF4F is a multi-subunit complex, the composition of which varies with external and internal environmental conditions. It is composed of at least EIF4A, EIF4E and EIF4G1/EIF4G3. Interacts with eIF3, mutually exclusive with EIF4A1 or EIFA2, EIF4E and through its N-terminus with PAPBC1. Interacts through its C-terminus with the serine/threonine kinases MKNK1, and with MKNK2. Appears to act as a scaffold protein, holding these enzymes in place to phosphorylate EIF4E. Non-phosphorylated EIF4EBP1 competes with EIF4G1/EIF4G3 to interact with EIF4E; insulin stimulated MAP-kinase (MAPK1 and MAPK3) phosphorylation of EIF4EBP1 causes dissociation of the complex allowing EIF4G1/EIF4G3 to bind and consequent initiation of translation. EIF4G1/EIF4G3 interacts with PABPC1 to bring about circularization of the mRNA. Rapamycin can attenuate insulin stimulation mediated by FKBPs. Interacts with EIF4E3. Interacts with CIRBP and MIF4GD. Interacts with rotavirus A NSP3; in this interaction, NSP3 takes the place of PABPC1 thereby inducing shutoff of host protein synthesis. Interacts with RBM4. Belongs to the eIF4G family. 5 isoforms of the human protein are produced by alternative splicing.

Protein type: Translation initiation; Translation; RNA-binding

Chromosomal Location of Human Ortholog: 3q27.1

Cellular Component: membrane; eukaryotic translation initiation factor 4F complex; cytosol

Molecular Function: protein binding; translation factor activity, nucleic acid binding; translation initiation factor activity

Biological Process: poly(A) tail shortening; cellular protein metabolic process; viral reproduction; translation; cytokine and chemokine mediated signaling pathway; insulin receptor signaling pathway; translational initiation; mRNA catabolic process, nonsense-mediated decay; gene expression; mRNA catabolic process, deadenylation-dependent decay; regulation of translational initiation