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EIF-W2 protein domain : ウィキペディア英語版 | EIF-W2 protein domain
In molecular biology, the protein domain eIF4-gamma/eIF5/eIF2-epsilon is a family of evolutionarily related proteins. This domain is found at the C-terminus of several translation Initiation factors. It was first detected at the very C-termini of the yeast protein GCD6, eIF-2B epsilon, and two other eukaryotic translation initiation factors, eIF-4 gamma and eIF-5 and it may be involved in the interaction of eIF-2B, eIF-4 gamma, and eIF-5 with eIF-2.〔 ==Function== In molecular biology, the eIF-W2 domain functions as the binding site for Mnk eIF4E kinase, an enzyme that phosphorylates eukaryotic initiation factor 4E (eIF4E). For eIF2B-epsilon, the W2 C-terminal domain functions in guanine nucleotide exchange on eIF2. For eIF5, the W2 domain functions in mediating the multifactor complex (MFC) formation with eIF1, eIF2-GTP, eIF3 and Met-tRNAiMet. The eIF5 W2 C-terminal domain and the adjacent N-terminal linker region is responsible for the GDI activity against eIF2-GDP.
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