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  • 1
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    RNA polymerase II is required for RNAi-dependent heterochromatin assembly (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-06-11
    Description: In Schizosaccharomyces pombe, the RNA interference (RNAi) machinery converts pericentromeric transcripts into small interfering RNAs (siRNAs) and is required for the assembly of pericentromeric heterochromatin. Here we describe a mutation in the second largest subunit of RNA polymerase II (RNAPII). Both wild-type and mutant RNAPII localized to the pericentromere. However, the mutation resulted in the loss of heterochromatic histone modifications and in the accumulation of pericentromeric transcripts, accompanied by the loss of siRNAs. This phenotype resembles mutants in RNAi and suggests that RNAPII couples pericentromeric transcription with siRNA processing and heterochromatin assembly.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kato, Hiroaki -- Goto, Derek B -- Martienssen, Robert A -- Urano, Takeshi -- Furukawa, Koichi -- Murakami, Yota -- R01-GM067014/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2005 Jul 15;309(5733):467-9. Epub 2005 Jun 9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Viral Oncology, Institute for Virus Research, Kyoto University, Kyoto 606-8507, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15947136" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Centromere/metabolism ; Chromosome Segregation ; Gene Expression Regulation, Fungal ; Heterochromatin/*metabolism ; Histones/metabolism ; Methylation ; Molecular Sequence Data ; Oligonucleotide Array Sequence Analysis ; Point Mutation ; *RNA Interference ; RNA Polymerase II/chemistry/genetics/*metabolism ; RNA, Fungal/metabolism ; RNA, Messenger/metabolism ; RNA, Small Interfering/*metabolism ; Schizosaccharomyces/enzymology/genetics/*metabolism ; Transcription, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    RNAi promotes heterochromatic silencing through replication-coupled release of RNA Pol II (2011)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2011-10-18
    Description: Heterochromatin comprises tightly compacted repetitive regions of eukaryotic chromosomes. The inheritance of heterochromatin through mitosis requires RNA interference (RNAi), which guides histone modification during the DNA replication phase of the cell cycle. Here we show that the alternating arrangement of origins of replication and non-coding RNA in pericentromeric heterochromatin results in competition between transcription and replication in Schizosaccharomyces pombe. Co-transcriptional RNAi releases RNA polymerase II (Pol II), allowing completion of DNA replication by the leading strand DNA polymerase, and associated histone modifying enzymes that spread heterochromatin with the replication fork. In the absence of RNAi, stalled forks are repaired by homologous recombination without histone modification.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3391703/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3391703/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zaratiegui, Mikel -- Castel, Stephane E -- Irvine, Danielle V -- Kloc, Anna -- Ren, Jie -- Li, Fei -- de Castro, Elisa -- Marin, Laura -- Chang, An-Yun -- Goto, Derek -- Cande, W Zacheus -- Antequera, Francisco -- Arcangioli, Benoit -- Martienssen, Robert A -- R01 GM076396/GM/NIGMS NIH HHS/ -- R01 GM076396-04/GM/NIGMS NIH HHS/ -- England -- Nature. 2011 Oct 16;479(7371):135-8. doi: 10.1038/nature10501.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cold Spring Harbor Laboratory, Cold Spring Harbor, New York 11724, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22002604" target="_blank"〉PubMed〈/a〉
    Keywords: Centromere/genetics/metabolism ; Chromosomal Proteins, Non-Histone/genetics/metabolism ; DNA Damage ; DNA Replication/*physiology ; DNA-Directed DNA Polymerase/metabolism ; *Gene Silencing ; Heterochromatin/*genetics/*metabolism ; Histones/metabolism ; Homologous Recombination ; Models, Genetic ; Molecular Sequence Data ; *RNA Interference ; RNA Polymerase II/*metabolism ; RNA, Small Interfering/genetics/metabolism ; Replication Origin ; S Phase ; Schizosaccharomyces/*genetics ; Schizosaccharomyces pombe Proteins/genetics/metabolism ; Transcription, Genetic
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 3
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    Argonaute slicing is required for heterochromatic silencing and spreading (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-08-26
    Description: Small interfering RNA (siRNA) guides dimethylation of histone H3 lysine-9 (H3K9me2) via the Argonaute and RNA-dependent RNA polymerase complexes, as well as base-pairing with either RNA or DNA. We show that Argonaute requires the conserved aspartate-aspartate-histidine motif for heterochromatic silencing and for ribonuclease H-like cleavage (slicing) of target messages complementary to siRNA. In the fission yeast Schizosaccharomyces pombe, heterochromatic repeats are transcribed by polymerase II. We show that H3K9me2 spreads into silent reporter genes when they are embedded within these transcripts and that spreading requires read-through transcription, as well as slicing by Argonaute. Thus, siRNA guides histone modification by basepairing interactions with RNA.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Irvine, Danielle V -- Zaratiegui, Mikel -- Tolia, Niraj H -- Goto, Derek B -- Chitwood, Daniel H -- Vaughn, Matthew W -- Joshua-Tor, Leemor -- Martienssen, Robert A -- R01 GM076396/GM/NIGMS NIH HHS/ -- R01 GM076396-01A1/GM/NIGMS NIH HHS/ -- R01-GM067014/GM/NIGMS NIH HHS/ -- R01-GM072659/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2006 Aug 25;313(5790):1134-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cold Spring Harbor Laboratory, 1 Bungtown Road, Cold Spring Harbor, NY 11724, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16931764" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Argonaute Proteins ; Base Pairing ; Genes, Reporter ; Heterochromatin/genetics/*metabolism ; Histones/metabolism ; *RNA Interference ; RNA, Fungal/*metabolism ; RNA, Messenger/metabolism ; RNA, Small Interfering/*metabolism ; RNA-Binding Proteins ; Recombinant Fusion Proteins/metabolism ; Schizosaccharomyces/*genetics/metabolism ; Schizosaccharomyces pombe Proteins/chemistry/genetics/*metabolism ; Transcription, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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