Human mitochondrial RNA decay mediated by PNPase-hSuv3 complex takes place in distinct foci
PBN-AR
Instytucja
Wydział Biologii (Uniwersytet Warszawski)
Informacje podstawowe
Główny język publikacji
en
Czasopismo
NUCLEIC ACIDS RESEARCH
ISSN
0305-1048
EISSN
1362-4962
Wydawca
OXFORD UNIV PRESS
DOI
URL
Rok publikacji
2013
Numer zeszytu
2
Strony od-do
1223-1240
Numer tomu
41
Identyfikator DOI
Liczba arkuszy
Autorzy
Pozostali autorzy
+ 1
Streszczenia
Język
en
Treść
RNA decay is usually mediated by protein complexes and can occur in specific foci such as P-bodies in the cytoplasm of eukaryotes. In human mitochondria nothing is known about the spatial organization of the RNA decay machinery, and the ribonuclease responsible for RNA degradation has not been identified. We demonstrate that silencing of human polynucleotide phosphorylase (PNPase) causes accumulation of RNA decay intermediates and increases the half-life of mitochondrial transcripts. A combination of fluorescence lifetime imaging microscopy with Förster resonance energy transfer and bimolecular fluorescence complementation (BiFC) experiments prove that PNPase and hSuv3 helicase (Suv3, hSuv3p and SUPV3L1) form the RNA-degrading complex in vivo in human mitochondria. This complex, referred to as the degradosome, is formed only in specific foci (named D-foci), which co-localize with mitochondrial RNA and nucleoids. Notably, interaction between PNPase and hSuv3 is essential for efficient mitochondrial RNA degradation. This provides indirect evidence that degradosome-dependent mitochondrial RNA decay takes place in foci.
Cechy publikacji
discipline:Biochemia – dziedzina nauk biologicznych
discipline:Biochemistry – field of biological sciences
Original article
Original article presents the results of original research or experiment.
Oryginalny artykuł naukowy
Oryginalny artykuł naukowy przedstawia rezultaty oryginalnych badań naukowych lub eksperymentu.
Inne
System-identifier
PBN-R:497081