Eukaryotic peptide chain release factor GTP-binding subunit

UniProtKB accession:  P05453

Grouped By:  Matching UniProtKB accession

UniProtKB description:  GTPase component of the eRF1-eRF3-GTP ternary complex, a ternary complex that mediates translation termination in response to the termination codons UAA, UAG and UGA (PubMed:7556078, PubMed:34413231). SUP35/eRF3 mediates SUP45/eRF1 delivery to stop codons: The eRF1-eRF3-GTP complex binds to a stop codon in the ribosomal A-site (PubMed:7556078, PubMed:34413231). GTP hydrolysis by SUP35/eRF3 induces a conformational change that leads to its dissociation, permitting SUP45/eRF1 to accommodate fully in the A-site (PubMed:7556078, PubMed:34413231). Recruited by polyadenylate-binding protein PAB1 to poly(A)-tails of mRNAs (PubMed:12923185, PubMed:15337765). Interaction with PAB1 is also required for regulation of normal mRNA decay through translation termination-coupled poly(A) shortening (PubMed:12923185, PubMed:15337765).