Protein Domain : Translation initiation factor IF2/IF5, N-terminal IPR016189

Type  Homologous_superfamily
Description  The beta subunit of archaeal and eukaryotic translation initiation factor 2 (IF2beta) and the N-terminal domain of translation initiation factor 5 (IF5) show significant sequence homology [ ]. Archaeal IF2beta contains two independent structural domains: an N-terminal mixed alpha/beta core domain (topological similarity to the common core of ribosomal proteins L23 and L15e), and a C-terminal domain consisting of a zinc-binding C4 finger []. Archaeal IF2beta is a ribosome-dependent GTPase that stimulates the binding of initiator Met-tRNA(i)(Met) to the ribosomes, even in the absence of other factors []. The C-terminal domain of eukaryotic IF5 is involved in the formation of the multi-factor complex (MFC), an important intermediate for the 43S pre-initiation complex assembly []. IF5 interacts directly with IF1, IF2beta and IF3c, which together with IF2-bound Met-tRNA(i)(Met) form the MFC.This superfamily represents the N-terminal alpha/beta domain found in IF2beta and IF5.
Short Name  Transl_init_fac_IF2/IF5_N

0 Child Features

0 Gene Families

406 Genes

2 Ontology Annotations

0 Parent Features

13 Publications

USDA
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