title: RNA degradation in yeast and human mitochondria.
abstract: Expression of mitochondrially encoded genes must be finely tuned according to the cell's requirements. Since yeast and human mitochondria have limited possibilities to regulate gene expression by altering the transcription initiation rate, posttranscriptional processes, including RNA degradation, are of great importance. In both organisms mitochondrial RNA degradation seems to be mostly depending on the RNA helicase Suv3. Yeast Suv3 functions in cooperation with Dss1 ribonuclease by forming a two-subunit complex called the mitochondrial degradosome. The human ortholog of Suv3 (hSuv3, hSuv3p, SUPV3L1) is also indispensable for mitochondrial RNA decay but its ribonucleolytic partner has so far escaped identification. In this review we summarize the current knowledge about RNA degradation in human and yeast mitochondria. This article is part of a Special Issue entitled: Mitochondrial Gene Expression.
authors.affiliation: Institute of Genetics and Biotechnology, Faculty of Biology, University of Warsaw, Warsaw, Poland. rszczesny@ibb.waw.pl
authors.forename: Roman J
authors.initials: RJ
authors.lastname: Szczesny
authors.forename: Lukasz S
authors.initials: LS
authors.lastname: Borowski
authors.forename: Michal
authors.initials: M
authors.lastname: Malecki
authors.forename: Magdalena A
authors.initials: MA
authors.lastname: Wojcik
authors.forename: Piotr P
authors.initials: PP
authors.lastname: Stepien
authors.forename: Pawel
authors.initials: P
authors.lastname: Golik
mesh_terms: D000255:Adenosine Triphosphate / Q000378:metabolism; D053487:DEAD-box RNA Helicases / Q000235:genetics / Q000378:metabolism; D005095:Exoribonucleases / Q000235:genetics / Q000378:metabolism; D005786:Gene Expression Regulation; D006801:Humans; D008928:Mitochondria / Q000235:genetics; D012313:RNA / Q000235:genetics / Q000378:metabolism; D020871:RNA Stability / Q000235:genetics*; D000077278:RNA, Mitochondrial; D012441:Saccharomyces cerevisiae / Q000235:genetics; D029701:Saccharomyces cerevisiae Proteins / Q000235:genetics / Q000378:metabolism; D024101:Mitochondrial Proteins
chemical_list: D000255:Adenosine Triphosphate; D053487:DEAD-box RNA Helicases; D005095:Exoribonucleases; D012313:RNA; D000077278:RNA, Mitochondrial; D029701:Saccharomyces cerevisiae Proteins; C476417:PNPT1 protein, human; D024101:Mitochondrial Proteins; C469673:SUPV3L1 protein, human; C075918:SUV3 protein, S cerevisiae