Term Name: | eukaryotic 48S preinitiation complex |
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Synonyms: | eukaryotic 48S initiation complex, eukaryotic 48S pre-initiation complex |
Definition: | The protein-ribosome-tRNA complex that has just recognized the start codon of a capped mRNA. It is composed of the small ribosomal subunit, eukaryote initiation factors (eIF) eIF3 complex, eIF1, eIF1A, eIF2-GDP, eIF4 complex and initiatior-methionine-tRNA. Recognition of the start codon triggers downstream steps in the pathway, including eIF1 dissociation; Pi release from eIF2; and conversion to the closed, scanning-arrested conformation of the PIC. |
Ontology: | GO: Cellular Component [GO:0033290] QuickGO AmiGO |