Take our Survey

Reference: van Laar T, et al. (2002) A role for Rad23 proteins in 26S proteasome-dependent protein degradation? Mutat Res 499(1):53-61

Reference Help

Abstract

Treatment of cells with genotoxic agents affects protein degradation in both positive and negative ways. Exposure of S. cerevisiae to the alkylating agent MMS resulted in activation of genes that are involved in ubiquitin- and 26S proteasome-dependent protein degradation. This process partially overlaps with the activation of the ER-associated protein degradation pathway. The DNA repair protein Rad23p and its mammalian homologues have been shown to inhibit degradation of specific substrates in response to DNA damage. Particularly the recently identified inhibition of degradation by mouse Rad23 protein (mHR23) of the associated nucleotide excision repair protein XPC was shown to stimulate DNA repair.Recently, it was shown that Rad23p and the mouse homologue mHR23B also associate with Png1p, a deglycosylation enzyme. Png1p-mediated deglycosylation plays a role in ER-associated protein degradation after accumulation of malfolded proteins in the endoplasmic reticulum. Thus, if stabilization of proteins that are associated with the C-terminus of Rad23p is a general phenomenon, then Rad23 might be implicated in the stimulation of ER-associated protein degradation as well. Interestingly, the recently identified HHR23-like protein Mif1 is also thought to play a role in ER-associated protein degradation. The MIF1 gene is strongly activated in response to ER-stress. Mif1 contains a ubiquitin-like domain which is most probably involved in binding to S5a, a subunit of the 19S regulatory complex of the 26S proteasome. On the basis of its localization in the ER-membrane, it is hypothesized that Mif1 could play a role in the translocation of the 26S proteasome towards the ER-membrane, thereby enhancing ER-associated protein degradation.

Reference Type
Journal Article | Review
Authors
van Laar T, van der Eb AJ, Terleth C
Primary Lit For
Additional Lit For
Review For

Interaction Annotations

Increase the total number of rows showing on this page by 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; click on the small "i" buttons located within a cell for an annotation to view further details about experiment type and any other genes involved in the interaction.

Interactor Interactor Type Assay Annotation Action Modification Phenotype Source Reference

Gene Ontology Annotations

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.

Gene Gene Ontology Term Qualifier Aspect Method Evidence Source Assigned On Annotation Extension Reference

Phenotype Annotations

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; click on the small "i" buttons located within a cell for an annotation to view further details.

Gene Phenotype Experiment Type Mutant Information Strain Background Chemical Details Reference

Regulation Annotations

Increase the total number of rows displayed 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; to filter the table by a specific experiment type, type a keyword into the Filter box (for example, “microarray”); download this table as a .txt file using the Download button or click Analyze to further view and analyze the list of target genes using GO Term Finder, GO Slim Mapper, SPELL, or YeastMine.

Regulator Target Experiment Assay Construct Conditions Strain Background Reference