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Titolo:
PROCESSING OF A DICISTRONIC SMALL NUCLEOLAR RNA PRECURSOR BY THE RNA ENDONUCLEASE RNT1
Autore:
CHANFREAU G; ROTONDO G; LEGRAIN P; JACQUIER A;
Indirizzi:
INST PASTEUR,CNRS,URA1300,LAB METAB ARN,DEPT BIOTECHNOL,25 RUE DR ROUX F-75724 PARIS 15 FRANCE
Titolo Testata:
EMBO journal (Print)
fascicolo: 13, volume: 17, anno: 1998,
pagine: 3726 - 3737
SICI:
0261-4189(1998)17:13<3726:POADSN>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
SMALL NUCLEAR-RNA; INTRON-ENCODED U16; 18S RIBOSOMAL-RNA; SACCHAROMYCES-CEREVISIAE; PREMESSENGER RNA; SECONDARY STRUCTURE; PRERIBOSOMAL RNA; MATURE SNORNA; BOX-C; GENE;
Keywords:
RNASE III; RIBOSOMAL-RNA; SNORNA; SNORNP; U14;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
55
Recensione:
Indirizzi per estratti:
Citazione:
G. Chanfreau et al., "PROCESSING OF A DICISTRONIC SMALL NUCLEOLAR RNA PRECURSOR BY THE RNA ENDONUCLEASE RNT1", EMBO journal (Print), 17(13), 1998, pp. 3726-3737

Abstract

Small nucleolar RNAs (snoRNAs) are intron encoded or expressed from monocistronic independent transcription units, or, in the case of plants, from polycistronic clusters. We show that the snR190 and U14 snoRNAs from the yeast Saccharomyces cerevisiae are co-transcribed as a dicistronic precursor which is processed by the RNA endonuclease Rnt1, theyeast ortholog of bacterial RNase III, RNT1 disruption results in a dramatic decrease in the levels of mature U14 and snR190 and in accumulation of dicistronic snR190-U14 RNAs. Addition of recombinant Rnt1 to yeast extracts made from RNT1 disruptants induces the chase of dicistronic RNAs into mature snoRNAs, showing that dicistronic RNAs correspond to functional precursors stalled in the processing pathway. Rnt1 cleaves a dicistronic transcript in vitro in the absence of other factors, separating snR190 from U14. Thus, one of the functions of eukaryoticRNase III is, as for the bacterial enzyme, to liberate monocistronic RNAs from polycistronic transcripts.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 12:56:48