EIF6
Protein-coding gene in the species Homo sapiens / From Wikipedia, the free encyclopedia
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Eukaryotic translation initiation factor 6 (EIF6), also known as Integrin beta 4 binding protein (ITGB4BP), is a human gene.[5]
Hemidesmosomes are structures which link the basal lamina to the intermediate filament cytoskeleton. An important functional component of hemidesmosomes is the integrin beta-4 subunit (ITGB4), a protein containing two fibronectin type III domains. The protein encoded by this gene binds to the fibronectin type III domains of ITGB4 and may help link ITGB4 to the intermediate filament cytoskeleton. The encoded protein, which is insoluble and found both in the nucleus and in the cytoplasm, can function as a translation initiation factor and catalyzes the association of the 40S and 60S ribosomal subunits along with eIF5 bound to GTP. Multiple transcript variants encoding several different isoforms have been found for this gene.[5]
EIF6 plays important roles in Eukaryotic 80S ribosome formation, cell growth and gene expression. The 80S ribosome, which can separate into 40S and 60S subunits. EIF6 helps to protect mature 60s subunit and then EIF6 should disassociate with 60s subunit so that it can binds to 40s subunit to form ribosome. Keeping in balance of EIF6 is essential for the body: few EIF6 helps synthesis of normal ribosome, while large amount of EIF6 inhibited 60s subunits bind to 40s subunits.[6]