EIF3B

The RRM domain mediates interaction with EIF3J.

RNA-binding component of the eukaryotic translation initiation factor 3 (eIF-3) complex, which is required for several steps in the initiation of protein synthesis (PubMed:17581632, PubMed:25849773, PubMed:27462815, PubMed:9388245). The eIF-3 complex associates with the 40S ribosome and facilitates the recruitment of eIF-1, eIF-1A, eIF-2:GTP:methionyl-tRNAi and eIF-5 to form the 43S pre-initiation complex (43S PIC). The eIF-3 complex stimulates mRNA recruitment to the 43S PIC and scanning of the mRNA for AUG recognition. The eIF-3 complex is also required for disassembly and recycling of post-termination ribosomal complexes and subsequently prevents premature joining of the 40S and 60S ribosomal subunits prior to initiation (PubMed:17581632, PubMed:9388245). The eIF-3 complex specifically targets and initiates translation of a subset of mRNAs involved in cell proliferation, including cell cycling, differentiation and apoptosis, and uses different modes of RNA stem-loop binding to exert either translational activation or repression (PubMed:25849773).

(Microbial infection) In case of FCV infection, plays a role in the ribosomal termination-reinitiation event leading to the translation of VP2 (PubMed:18056426).

Phosphorylated. Phosphorylation is enhanced upon serum stimulation.

Belongs to the eIF-3 subunit B family.

• Cytoplasm
• Cytoplasm
• Stress granule
• Localizes to stress granules following cellular stress.

EIF3S9, EIF3B, Eukaryotic translation initiation factor 3 subunit B, eIF3b, Eukaryotic translation initiation factor 3 subunit 9, Prt1 homolog, eIF-3-eta, eIF3 p110, eIF3 p116, hPrt1

• entrezGene:8662
• omim:603917
• swissprot:P55884

Proteins

Metabolism

92482Da