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  • Computational Biology  (2)
  • Nature Publishing Group (NPG)  (2)
  • Wiley
  • 1
    Publication Date: 2008-02-19
    Description: Cytosine DNA methylation is important in regulating gene expression and in silencing transposons and other repetitive sequences. Recent genomic studies in Arabidopsis thaliana have revealed that many endogenous genes are methylated either within their promoters or within their transcribed regions, and that gene methylation is highly correlated with transcription levels. However, plants have different types of methylation controlled by different genetic pathways, and detailed information on the methylation status of each cytosine in any given genome is lacking. To this end, we generated a map at single-base-pair resolution of methylated cytosines for Arabidopsis, by combining bisulphite treatment of genomic DNA with ultra-high-throughput sequencing using the Illumina 1G Genome Analyser and Solexa sequencing technology. This approach, termed BS-Seq, unlike previous microarray-based methods, allows one to sensitively measure cytosine methylation on a genome-wide scale within specific sequence contexts. Here we describe methylation on previously inaccessible components of the genome and analyse the DNA methylation sequence composition and distribution. We also describe the effect of various DNA methylation mutants on genome-wide methylation patterns, and demonstrate that our newly developed library construction and computational methods can be applied to large genomes such as that of mouse.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2377394/" 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/PMC2377394/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cokus, Shawn J -- Feng, Suhua -- Zhang, Xiaoyu -- Chen, Zugen -- Merriman, Barry -- Haudenschild, Christian D -- Pradhan, Sriharsa -- Nelson, Stanley F -- Pellegrini, Matteo -- Jacobsen, Steven E -- Howard Hughes Medical Institute/ -- England -- Nature. 2008 Mar 13;452(7184):215-9. doi: 10.1038/nature06745. Epub 2008 Feb 17.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular, Cell, and Developmental Biology, University of California at Los Angeles, Los Angeles, California 90095, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18278030" target="_blank"〉PubMed〈/a〉
    Keywords: 5-Methylcytosine/metabolism ; Animals ; Arabidopsis/*genetics ; Base Sequence ; Computational Biology ; Cytosine/metabolism ; *DNA Methylation ; Gene Expression Regulation, Plant/genetics ; Gene Library ; Genome, Plant/*genetics ; Mice ; Mutation/genetics ; Promoter Regions, Genetic/genetics ; Reproducibility of Results ; Sequence Analysis, DNA/*methods ; Sulfites/*metabolism ; Uracil/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 2008-01-18
    Description: The RIG-like helicase (RLH) family of intracellular receptors detect viral nucleic acid and signal through the mitochondrial antiviral signalling adaptor MAVS (also known as Cardif, VISA and IPS-1) during a viral infection. MAVS activation leads to the rapid production of antiviral cytokines, including type 1 interferons. Although MAVS is vital to antiviral immunity, its regulation from within the mitochondria remains unknown. Here we describe human NLRX1, a highly conserved nucleotide-binding domain (NBD)- and leucine-rich-repeat (LRR)-containing family member (known as NLR) that localizes to the mitochondrial outer membrane and interacts with MAVS. Expression of NLRX1 results in the potent inhibition of RLH- and MAVS-mediated interferon-beta promoter activity and in the disruption of virus-induced RLH-MAVS interactions. Depletion of NLRX1 with small interference RNA promotes virus-induced type I interferon production and decreases viral replication. This work identifies NLRX1 as a check against mitochondrial antiviral responses and represents an intersection of three ancient cellular processes: NLR signalling, intracellular virus detection and the use of mitochondria as a platform for anti-pathogen signalling. This represents a conceptual advance, in that NLRX1 is a modulator of pathogen-associated molecular pattern receptors rather than a receptor, and identifies a key therapeutic target for enhancing antiviral responses.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moore, Chris B -- Bergstralh, Daniel T -- Duncan, Joseph A -- Lei, Yu -- Morrison, Thomas E -- Zimmermann, Albert G -- Accavitti-Loper, Mary A -- Madden, Victoria J -- Sun, Lijun -- Ye, Zhengmao -- Lich, John D -- Heise, Mark T -- Chen, Zhijian -- Ting, Jenny P-Y -- England -- Nature. 2008 Jan 31;451(7178):573-7. doi: 10.1038/nature06501. Epub 2008 Jan 16.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology-Immunology, University of North Carolina, Chapel Hill, North Carolina 27599, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18200010" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptor Proteins, Signal Transducing/antagonists & inhibitors/metabolism ; Animals ; Cell Line ; Cloning, Molecular ; Computational Biology ; Humans ; Interferon-beta/biosynthesis/genetics/metabolism ; Mice ; Mitochondria/*immunology/*metabolism ; Mitochondrial Membranes/metabolism ; Mitochondrial Proteins/genetics/*metabolism ; NF-kappa B/metabolism ; Protein Binding ; Protein Transport ; RNA, Small Interfering/genetics/metabolism ; Signal Transduction ; Virus Replication ; Viruses/*immunology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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