Rsp5 ubiquitin ligase affects isoprenoid pathway and cell wall organization in S. cerevisiae.
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چکیده
منابع مشابه
Rsp5 ubiquitin ligase affects isoprenoid pathway and cell wall organization in S. cerevisiae.
Dimethylallyl diphosphate, an isomer of isopentenyl diphosphate, is a common substrate of Mod5p, a tRNA modifying enzyme, and the farnesyl diphosphate synthase Erg20p, the key enzyme of the isoprenoid pathway. rsp5 mutants, defective in the Rsp5 ubiquitin-protein ligase, were isolated and characterized as altering the mitochondrial/cytosolic distribution of Mod5p. To understand better how compe...
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Rsp5p is a conserved HECT-domain ubiquitin ligase with diverse roles in cellular physiology. Here we report a previously unknown role of Rsp5p in facilitating the stability of the cytoplasmic ribosome pool in budding yeast. Yeast strains carrying temperature-sensitive mutations in RSP5 showed a progressive decline in levels of 18S and 25S rRNAs and accumulation of rRNA decay fragments when cell...
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Retrograde trafficking from the Golgi to the endoplasmic reticulum (ER) depends on the formation of vesicles coated with the multiprotein complex COPI. In Saccharomyces cerevisiae ubiquitinated derivatives of several COPI subunits have been identified. The importance of this modification of COPI proteins is unknown. With the exception of the Sec27 protein (β'COP) neither the ubiquitin ligase re...
متن کاملHem12, an enzyme of heme biosynthesis pathway, is monoubiquitinated by Rsp5 ubiquitin ligase in yeast cells.
Heme biosynthesis pathway is conserved in yeast and humans and hem12 yeast mutants mimic porphyria cutanea tarda (PCT), a hereditary human disease caused by mutations in the UROD gene. Even though mutations in other genes also affect UROD activity and predispose to sporadic PCT, the regulation of UROD is unknown. Here, we used yeast as a model to study regulation of Hem12 by ubiquitination and ...
متن کاملG Protein Mono-ubiquitination by the Rsp5 Ubiquitin Ligase.
Emerging evidence suggests that ubiquitination serves as a protein trafficking signal in addition to its well characterized role in promoting protein degradation. The yeast G protein alpha subunit Gpa1 represents a rare example of a protein that undergoes both mono- and poly-ubiquitination. Whereas mono-ubiquitinated Gpa1 is targeted to the vacuole, poly-ubiquitinated Gpa1 is directed instead t...
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ژورنال
عنوان ژورنال: Acta Biochimica Polonica
سال: 2005
ISSN: 1734-154X,0001-527X
DOI: 10.18388/abp.2005_3510