Eukaryotic translation initiation factor 3 subunit F is a component of the eukaryotic translation initiation factor 3 (eIF-3) complex, which is involved in protein synthesis and, together with other initiation factors, stimulates binding of mRNA and methionyl-tRNAi to the 40S ribosome [, ]. In humans, it exhibits a deubiquitinase activity regulating Notch activation [].
This domain is found at the C terminus of many regulatory proteins, including the yeast proteasomal subunit Rpn11 and eukaryotic initiation factor 3 subunit F (eIF3f). The Rpn11 C-terminal domain is necessary for normal mitochondrial morphology and function and is thought to regulate the mitochondrial fission and tubulation processes []. The eIF3f C-terminal domain is critical for proper eIF3f activity in skeletal muscle through its interaction with mTOR (also known as FRAP, RAFT1 or RAPT) [, ].
