Mitochondrial transcription termination factor 1 directs polar replication fork pausing
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چکیده
منابع مشابه
Mitochondrial transcription termination factor 1 directs polar replication fork pausing
During replication of nuclear ribosomal DNA (rDNA), clashes with the transcription apparatus can cause replication fork collapse and genomic instability. To avoid this problem, a replication fork barrier protein is situated downstream of rDNA, there preventing replication in the direction opposite rDNA transcription. A potential candidate for a similar function in mitochondria is the mitochondr...
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The mammalian mitochondrial transcription termination factor mTERF binds with high affinity to a site within the tRNA(Leu(UUR)) gene and regulates the amount of read through transcription from the ribosomal DNA into the remaining genes of the major coding strand of mitochondrial DNA (mtDNA). Electrophoretic mobility shift assays (EMSA) and SELEX, using mitochondrial protein extracts from cells ...
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A replication fork barrier (RFB) at the 3' end of eukaryotic ribosomal RNA genes blocks bidirectional fork progression and limits DNA replication to the same direction as transcription. We have reproduced the RFB in vitro in HeLa cell extracts using 3' terminal murine rDNA fused to an SV40 origin-based vector. The RFB is polar and modularly organized, requiring both the Sal box transcription te...
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متن کاملComparison of pausing during transcription and replication.
Pausing during the transcription of MDV-1 cDNA by Escherichia coli RNA polymerase was compared with pausing during the replication of MDV-1 RNA by Q beta replicase. MDV-1 RNA is able to form many strong hairpin structures, and Q beta replicase pauses after the synthesis of each [Mills et al. (1978) Cell 15, 541-550]. Although the transcripts were virtually identical to MDV-1 RNA, the locations ...
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ژورنال
عنوان ژورنال: Nucleic Acids Research
سال: 2016
ISSN: 0305-1048,1362-4962
DOI: 10.1093/nar/gkw302