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Eukaryotic translation initiation factor 2 complex Overview

GO Annotations consist of four mandatory components: a gene product, a term from one of the three Gene Ontology (GO) controlled vocabularies (Molecular Function, Biological Process, and Cellular Component), a reference, and an evidence code.

Summary
Delivers initiator methionyl-tRNA to the 40S ribosomal subunit in a eukaryotic translation initiation factor 2 (eIF2).GTP.Met-tRNA(Met) ternary complex. The resulting 43S complex, which also includes eIF3 and eIF1A, binds at or near the 5-prime end of capped eukaryotic messenger RNAs. Recognition of the AUG codon translational start site is accompanied by GTP hydrolysis (stimulated by the eIF5 complex), which releases Met-tRNA to the ribosomal peptidyl site and converts eIF2-GTP to eIF2-GDP. Binding of nucleotide exchange factor eIF2B complex (CPX-429) replaces GDP again for GTP. This activity is inhibited when phosphorylated eIF2 (alpha subunit) binds to eIF2B. Phosphorylation of eIF2 occurs in response to nutrient starvation and thus prevents further protein synthesis.
GO Slim Terms

The yeast GO Slim terms are higher level terms that best represent the major S. cerevisiae biological processes, functions, and cellular components. The GO Slim terms listed here are the broader parent terms for the specific terms to which this gene product is annotated, and thus represent the more general processes, functions, and components in which it is involved.

RNA binding, ion binding, translation factor activity, RNA binding, translational initiation, organelle, ribosome, intracellular non-membrane-bounded organelle

Biological Process

Manually curated GO annotations reflect our best understanding of the basic biological process for this protein complex. Manually curated annotations are assigned by curators based on published papers when available, or by curatorial statements if necessary. Curators periodically review all manually curated GO annotations for accuracy and completeness.

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Qualifier Gene Ontology Term Annotation Extension Evidence Source Assigned On Reference

Molecular Function

Manually curated GO annotations reflect our best understanding of the basic molecular function for this protein complex. Manually curated annotations are assigned by curators based on published papers when available, or by curatorial statements if necessary. Curators periodically review all manually curated GO annotations for accuracy and completeness.

Increase the total number of rows showing on this page using the pull-down located below the table, or use the page scroll at the table's top right to browse through the table's pages; use the arrows to the right of a column header to sort by that column; filter the table using the "Filter" box at the top of the table.

Qualifier Gene Ontology Term Annotation Extension Evidence Source Assigned On Reference

Cellular Component

Manually curated GO annotations reflect our best understanding of the basic cellular component for this protein complex. Manually curated annotations are assigned by curators based on published papers when available, or by curatorial statements if necessary. Curators periodically review all manually curated GO annotations for accuracy and completeness.

Increase the total number of rows showing on this page using the pull-down located below the table, or use the page scroll at the table's top right to browse through the table's pages; use the arrows to the right of a column header to sort by that column; filter the table using the "Filter" box at the top of the table.

Qualifier Gene Ontology Term Annotation Extension Evidence Source Assigned On Reference

Shared Annotations

This diagram displays Gene Ontology terms (green) that are shared between the given macromolecular complex (black) and other yeast complexes (yellow). Note: No diagram is shown ("No shared annotations") if there are less than 2 shared GO annotations between this complex and any other complexes.