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Nonsense-mediated decay 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
Recognizes and elicits the rapid degradation of mRNAs that prematurely terminate translation and also regulates the expression of specific genes by degrading natural mRNAs. Nonsence-mediated decay (NMD) is triggered by the messenger ribonucleoprotein (mRNP) context surrounding the translation termination event. NMD targets can be recognized as targets due to the lack of factors bound downstream from the termination codon. A ribosome terminating translation at a termination codon substantially upstream from the poly(A) tail terminates translation inefficiently. NMD may occur because the PAB1 (P04147) or other factor bound to the poly(A) tail is not in close enough proximity to the terminating ribosome to enable interaction of the PAB1 with SUP35 (P05453), which is bound to the terminating ribosome and thus establishes the correct mRNP context for a normal translation termination event. In the absence of correct translation termination, the nonsense-mediated decay complex interacts with the translation release factor ERF1-ERF3 complex (CPX-435), resulting in an aberrant translation termination event and NMD activation. NMD activation leads to the decapping of the mRNA by the decapping complex, DCP1-DCP2 (CPX-1628), followed by 5-prime to 3-prime degradation of the mRNA by the exoribonuclease XRN1 (P22147).
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, helicase activity, ion binding, RNA catabolic process, catabolic process, cellular nitrogen compound metabolic process, nucleobase-containing compound catabolic process, cytoplasm

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.