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  • 1
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    FD, a bZIP protein mediating signals from the floral pathway integrator FT at the shoot apex (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-08-16
    Description: FLOWERING LOCUS T (FT) is a conserved promoter of flowering that acts downstream of various regulatory pathways, including one that mediates photoperiodic induction through CONSTANS (CO), and is expressed in the vasculature of cotyledons and leaves. A bZIP transcription factor, FD, preferentially expressed in the shoot apex is required for FT to promote flowering. FD and FT are interdependent partners through protein interaction and act at the shoot apex to promote floral transition and to initiate floral development through transcriptional activation of a floral meristem identity gene, APETALA1 (AP1). FT may represent a long-distance signal in flowering.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Abe, Mitsutomo -- Kobayashi, Yasushi -- Yamamoto, Sumiko -- Daimon, Yasufumi -- Yamaguchi, Ayako -- Ikeda, Yoko -- Ichinoki, Harutaka -- Notaguchi, Michitaka -- Goto, Koji -- Araki, Takashi -- New York, N.Y. -- Science. 2005 Aug 12;309(5737):1052-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Botany, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16099979" target="_blank"〉PubMed〈/a〉
    Keywords: Arabidopsis/genetics/*growth & development/*metabolism ; Arabidopsis Proteins/genetics/*metabolism ; Cell Nucleus/metabolism ; Cotyledon/metabolism ; Flowers/*growth & development ; Gene Expression ; Gene Expression Regulation, Plant ; Genes, Plant ; Homeodomain Proteins/genetics/metabolism ; MADS Domain Proteins ; Meristem/genetics/metabolism ; Morphogenesis ; Mutation ; Phenotype ; Plant Leaves/metabolism ; Plant Proteins/genetics/metabolism ; Plant Shoots/metabolism ; Protein Interaction Mapping ; Recombinant Fusion Proteins/metabolism ; *Signal Transduction ; Transcription Factors/genetics/*metabolism ; Transcriptional Activation
    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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    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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  • 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)
    Location Call Number Expected Availability
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