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Native elongating transcript sequencing (NET-seq) of wild type Saccharomyces cerevisiae and of DST1, RCO1, SET1, SET2, EAF3 deletion strains

ABSTRACT: We present an approach (native elongating transcript sequencing, NET-seq), based on deep sequencing of 3’ ends of nascent transcripts associated with RNA polymerase, to monitor transcription at nucleotide resolution. Application of NET-seq in Saccharomyces cerevisiae reveals that while promoters are generally capable of divergent transcription, the Rpd3S deacetylation complex enforces strong directionality to most promoters by suppressing antisense transcript initiation. Our studies also reveal pervasive polymerase pausing and backtracking throughout the body of transcripts. Average pause density shows prominent peaks at each of the first four nucleosomes, with the peak location occurring in good agreement with in vitro biophysical measurements. Thus nucleosome-induced pausing represents a major barrier to transcriptional elongation in vivo.

ORGANISM(S): Saccharomyces cerevisiae

PROVIDER: GSE25107 | GEO | 2011/01/19

SECONDARY ACCESSION(S): PRJNA134499

REPOSITORIES: GEO

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Native elongating transcript sequencing (NET-seq) of wild type Saccharomyces cerevisiae and of DST1, RCO1, SET1, SET2, EAF3 deletion strains

Project description:We present an approach (native elongating transcript sequencing, NET-seq), based on deep sequencing of 3M-bM-^@M-^Y ends of nascent transcripts associated with RNA polymerase, to monitor transcription at nucleotide resolution. Application of NET-seq in Saccharomyces cerevisiae reveals that while promoters are generally capable of divergent transcription, the Rpd3S deacetylation complex enforces strong directionality to most promoters by suppressing antisense transcript initiation. Our studies also reveal pervasive polymerase pausing and backtracking throughout the body of transcripts. Average pause density shows prominent peaks at each of the first four nucleosomes, with the peak location occurring in good agreement with in vitro biophysical measurements. Thus nucleosome-induced pausing represents a major barrier to transcriptional elongation in vivo. Examination of nascent transcripts in yeast and mutant strains

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