Protein: Eukaryotic peptide chain release factor GTP-binding subunit ERF3B (Q8IYD1)
Organism: Homo sapiens (Human)
Function: 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. GSPT2/ERF3B mediates ETF1/ERF1 delivery to stop codons: The eRF1-eRF3-GTP complex binds to a stop codon in the ribosomal A-site. GTP hydrolysis by GSPT2/ERF3B induces a conformational change that leads to its dissociation, permitting ETF1/ERF1 to accommodate fully in the A-site. Component of the transient SURF complex which recruits UPF1 to stalled ribosomes in the context of nonsense-mediated decay (NMD) of mRNAs containing premature stop codons
Subcellular location: Cytoplasm
Sequence: MDSGSSSSDSAPDCWDQVDMESPGSAPSGDGVSSAVAEAQREPLSSAFSRKLNVNAKPFVPNVHAAEFVPSFLRGPTQPPTLPAGSGSNDETCTGAGYPQGKRMGRGAPVEPSREEPLVSLEGSNSAVTMELSEPVVENGEVEMALEESWEHSKEVSEAEPGGGSSGDSGPPEESGQEMMEEKEEIRKSKSVIVPSGAPKKEHVNVVFIGHVDAGKSTIGGQIMFLTGMVDKRTLEKYEREAKEKNRETWYLSWALDTNQEERDKGKTVEVGRAYFETERKHFTILDAPGHKSFVPNMIGGASQADLAVLVISARKGEFETGFEKGGQTREHAMLAKTAGVKHLIVLINKMDDPTVNWSIERYEECKEKLVPFLKKVGFSPKKDIHFMPCSGLTGANIKEQSDFCPWYTGLPFIPYLDNLPNFNRSIDGPIRLPIVDKYKDMGTVVLGKLESGSIFKGQQLVMMPNKHNVEVLGILSDDTETDFVAPGENLKIRLKGIEEEEILPGFILCDPSNLCHSGRTFDVQIVIIEHKSIICPGYNAVLHIHTCIEEVEITALISLVDKKSGEKSKTRPRFVKQDQVCIARLRTAGTICLETFKDFPQMGRFTLRDEGKTIAIGKVLKLVPEKD
InterPro domains: - IPR000795: Translational (tr)-type GTP-binding domain (domain) [201-425]
- IPR009000: Translation protein, beta-barrel domain superfamily (homologous_superfamily) [425-515]
- IPR009818: PAM2 motif (conserved_site) [47-64]
- IPR050100: Translation factor GTPase superfamily members (family) [200-623]
- IPR027417: P-loop containing nucleoside triphosphate hydrolase (homologous_superfamily) [183-443]
- IPR031157: Tr-type G domain, conserved site (conserved_site) [257-272]
- IPR009001: Translation elongation factor EF1A/initiation factor IF2gamma, C-terminal (homologous_superfamily) [521-624]
- IPR004161: Translation elongation factor EFTu-like, domain 2 (domain) [443-510]
- IPR054696: GTP-eEF1A, C-terminal domain (domain) [522-620]
Interaction partners: - Eukaryotic peptide chain release factor subunit 1
- Serine/threonine-protein kinase SMG1
- Polyadenylate-binding protein 1
- Eukaryotic peptide chain release factor GTP-binding subunit ERF3A
- Bifunctional 3'-phosphoadenosine 5'-phosphosulfate synthase 2
- Bifunctional 3'-phosphoadenosine 5'-phosphosulfate synthase 1
- Regulator of nonsense transcripts 1
- Bifunctional glutamate/proline--tRNA ligase
- GTP-binding protein 4
- Polyadenylate-binding protein-interacting protein 1
Gene Ontology annotations:
Molecular Function (MF): GO:0003674 (molecular function), GO:0005488 (binding), GO:0097159 (organic cyclic compound binding), GO:1901363 (heterocyclic compound binding), GO:0005515 (protein binding), GO:0003676 (nucleic acid binding), GO:0003723 (RNA binding)
Biological Process (BP): GO:0008150 (biological process), GO:0008152 (metabolic process), GO:0009987 (cellular process), GO:0009058 (biosynthetic process), GO:0044238 (primary metabolic process), GO:0044237 (cellular metabolic process), GO:0071704 (organic substance metabolic process), GO:0006807 (nitrogen compound metabolic process), GO:0044249 (cellular biosynthetic process), GO:0034641 (cellular nitrogen compound metabolic process), GO:0043603 (amide metabolic process), GO:1901564 (organonitrogen compound metabolic process), GO:1901576 (organic substance biosynthetic process), GO:0044260 (cellular macromolecule metabolic process), GO:0043170 (macromolecule metabolic process), GO:0019538 (protein metabolic process), GO:1901566 (organonitrogen compound biosynthetic process), GO:0006412 (translation), GO:0009059 (macromolecule biosynthetic process), GO:0043604 (amide biosynthetic process), GO:0044271 (cellular nitrogen compound biosynthetic process), GO:0034645 (cellular macromolecule biosynthetic process), GO:0006518 (peptide metabolic process), GO:0010467 (gene expression), GO:0043043 (peptide biosynthetic process)
Cellular Component (CC): GO:0005575 (cellular component), GO:0110165 (cellular anatomical entity), GO:0005737 (cytoplasm), GO:0005829 (cytosol), GO:0005622 (intracellular anatomical structure)