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  • Amino Acid Sequence  (36)
  • 2010-2014  (36)
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  • Articles  (36)
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  • 2010-2014  (36)
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  • 1
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    Prion strain mutation determined by prion protein conformational compatibility and primary structure (2010)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2010-05-15
    Description: Prions are infectious proteins composed of the abnormal disease-causing isoform PrPSc, which induces conformational conversion of the host-encoded normal cellular prion protein PrPC to additional PrPSc. The mechanism underlying prion strain mutation in the absence of nucleic acids remains unresolved. Additionally, the frequency of strains causing chronic wasting disease (CWD), a burgeoning prion epidemic of cervids, is unknown. Using susceptible transgenic mice, we identified two prevalent CWD strains with divergent biological properties but composed of PrPSc with indistinguishable biochemical characteristics. Although CWD transmissions indicated stable, independent strain propagation by elk PrPC, strain coexistence in the brains of deer and transgenic mice demonstrated unstable strain propagation by deer PrPC. The primary structures of deer and elk prion proteins differ at residue 226, which, in concert with PrPSc conformational compatibility, determines prion strain mutation in these cervids.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4097672/" 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/PMC4097672/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Angers, Rachel C -- Kang, Hae-Eun -- Napier, Dana -- Browning, Shawn -- Seward, Tanya -- Mathiason, Candace -- Balachandran, Aru -- McKenzie, Debbie -- Castilla, Joaquin -- Soto, Claudio -- Jewell, Jean -- Graham, Catherine -- Hoover, Edward A -- Telling, Glenn C -- 1P01AI077774-01/AI/NIAID NIH HHS/ -- 2R01 NS040334-04/NS/NINDS NIH HHS/ -- N01-AI-25491/AI/NIAID NIH HHS/ -- P01 AI077774/AI/NIAID NIH HHS/ -- R01 NS049173/NS/NINDS NIH HHS/ -- T32 AI49795/AI/NIAID NIH HHS/ -- T32 DA022738/DA/NIDA NIH HHS/ -- New York, N.Y. -- Science. 2010 May 28;328(5982):1154-8. doi: 10.1126/science.1187107. Epub 2010 May 13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology, Immunology and Molecular Genetics, University of Kentucky Medical Center, Lexington, KY 40536, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20466881" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Brain/pathology ; Brain Chemistry ; *Deer ; Disease Susceptibility ; Mice ; Mice, Transgenic ; Mutation ; PrPC Proteins/*chemistry/genetics ; PrPSc Proteins/analysis/*chemistry/genetics/pathogenicity ; Protein Conformation ; Protein Folding ; Selection, Genetic ; Serial Passage ; Species Specificity ; *Wasting Disease, Chronic/pathology/transmission
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
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    Recognition of a signal peptide by the signal recognition particle (2010)
    Nature Publishing Group (NPG)
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    Publication Date: 2010-04-07
    Description: Targeting of proteins to appropriate subcellular compartments is a crucial process in all living cells. Secretory and membrane proteins usually contain an amino-terminal signal peptide, which is recognized by the signal recognition particle (SRP) when nascent polypeptide chains emerge from the ribosome. The SRP-ribosome nascent chain complex is then targeted through its GTP-dependent interaction with SRP receptor to the protein-conducting channel on endoplasmic reticulum membrane in eukaryotes or plasma membrane in bacteria. A universally conserved component of SRP (refs 1, 2), SRP54 or its bacterial homologue, fifty-four homologue (Ffh), binds the signal peptides, which have a highly divergent sequence divisible into a positively charged n-region, an h-region commonly containing 8-20 hydrophobic residues and a polar c-region. No structure has been reported that exemplifies SRP54 binding of any signal sequence. Here we have produced a fusion protein between Sulfolobus solfataricus SRP54 (Ffh) and a signal peptide connected via a flexible linker. This fusion protein oligomerizes in solution through interaction between the SRP54 and signal peptide moieties belonging to different chains, and it is functional, as demonstrated by its ability to bind SRP RNA and SRP receptor FtsY. We present the crystal structure at 3.5 A resolution of an SRP54-signal peptide complex in the dimer, which reveals how a signal sequence is recognized by SRP54.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2897128/" 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/PMC2897128/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Janda, Claudia Y -- Li, Jade -- Oubridge, Chris -- Hernandez, Helena -- Robinson, Carol V -- Nagai, Kiyoshi -- MC_U105184330/Medical Research Council/United Kingdom -- U.1051.04.016(78933)/Medical Research Council/United Kingdom -- Medical Research Council/United Kingdom -- England -- Nature. 2010 May 27;465(7297):507-10. doi: 10.1038/nature08870. Epub 2010 Apr 4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉MRC Laboratory of Molecular Biology, Hills Road, Cambridge CB2 0QH, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20364120" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Bacterial Proteins/metabolism ; Crystallography, X-Ray ; Mass Spectrometry ; Models, Molecular ; Molecular Sequence Data ; Protein Binding ; Protein Multimerization ; Protein Sorting Signals/*physiology ; Protein Structure, Quaternary ; Protein Structure, Tertiary ; Receptors, Cytoplasmic and Nuclear/metabolism ; Receptors, Virus/metabolism ; Recombinant Fusion Proteins/chemistry/metabolism ; Signal Recognition Particle/*chemistry/*metabolism ; Structure-Activity Relationship ; Sulfolobus solfataricus/*chemistry
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 3
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    Genome evolution following host jumps in the Irish potato famine pathogen lineage (2010)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2010-12-15
    Description: Many plant pathogens, including those in the lineage of the Irish potato famine organism Phytophthora infestans, evolve by host jumps followed by specialization. However, how host jumps affect genome evolution remains largely unknown. To determine the patterns of sequence variation in the P. infestans lineage, we resequenced six genomes of four sister species. This revealed uneven evolutionary rates across genomes with genes in repeat-rich regions showing higher rates of structural polymorphisms and positive selection. These loci are enriched in genes induced in planta, implicating host adaptation in genome evolution. Unexpectedly, genes involved in epigenetic processes formed another class of rapidly evolving residents of the gene-sparse regions. These results demonstrate that dynamic repeat-rich genome compartments underpin accelerated gene evolution following host jumps in this pathogen lineage.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Raffaele, Sylvain -- Farrer, Rhys A -- Cano, Liliana M -- Studholme, David J -- MacLean, Daniel -- Thines, Marco -- Jiang, Rays H Y -- Zody, Michael C -- Kunjeti, Sridhara G -- Donofrio, Nicole M -- Meyers, Blake C -- Nusbaum, Chad -- Kamoun, Sophien -- New York, N.Y. -- Science. 2010 Dec 10;330(6010):1540-3. doi: 10.1126/science.1193070.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Sainsbury Laboratory, Norwich Research Park, Norwich NR4 7UH, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21148391" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptation, Physiological/genetics ; Amino Acid Sequence ; Computational Biology ; DNA Copy Number Variations ; Epistasis, Genetic ; *Evolution, Molecular ; Genes ; *Genome ; Host Specificity/*genetics ; Host-Parasite Interactions ; Lycopersicon esculentum/parasitology ; Molecular Sequence Data ; Phytophthora/classification/*genetics/pathogenicity/physiology ; Phytophthora infestans/classification/*genetics/*pathogenicity/physiology ; Plant Diseases/*parasitology ; Polymorphism, Single Nucleotide ; Proteins/chemistry/genetics/metabolism ; Selection, Genetic ; Sequence Analysis, DNA ; Solanum tuberosum/parasitology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
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    Analysis of Drosophila TRPA1 reveals an ancient origin for human chemical nociception (2010)
    Nature Publishing Group (NPG)
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    Publication Date: 2010-03-20
    Description: Chemical nociception, the detection of tissue-damaging chemicals, is important for animal survival and causes human pain and inflammation, but its evolutionary origins are largely unknown. Reactive electrophiles are a class of noxious compounds humans find pungent and irritating, such as allyl isothiocyanate (in wasabi) and acrolein (in cigarette smoke). Diverse animals, from insects to humans, find reactive electrophiles aversive, but whether this reflects conservation of an ancient sensory modality has been unclear. Here we identify the molecular basis of reactive electrophile detection in flies. We demonstrate that Drosophila TRPA1 (Transient receptor potential A1), the Drosophila melanogaster orthologue of the human irritant sensor, acts in gustatory chemosensors to inhibit reactive electrophile ingestion. We show that fly and mosquito TRPA1 orthologues are molecular sensors of electrophiles, using a mechanism conserved with vertebrate TRPA1s. Phylogenetic analyses indicate that invertebrate and vertebrate TRPA1s share a common ancestor that possessed critical characteristics required for electrophile detection. These findings support emergence of TRPA1-based electrophile detection in a common bilaterian ancestor, with widespread conservation throughout vertebrate and invertebrate evolution. Such conservation contrasts with the evolutionary divergence of canonical olfactory and gustatory receptors and may relate to electrophile toxicity. We propose that human pain perception relies on an ancient chemical sensor conserved across approximately 500 million years of animal evolution.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2845738/" 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/PMC2845738/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kang, Kyeongjin -- Pulver, Stefan R -- Panzano, Vincent C -- Chang, Elaine C -- Griffith, Leslie C -- Theobald, Douglas L -- Garrity, Paul A -- P01 NS044232/NS/NINDS NIH HHS/ -- P01 NS044232-060002/NS/NINDS NIH HHS/ -- P01 NS044232-070002/NS/NINDS NIH HHS/ -- P01 NS044232-080002/NS/NINDS NIH HHS/ -- R01 MH067284/MH/NIMH NIH HHS/ -- R01 MH067284-06A1/MH/NIMH NIH HHS/ -- R01 MH067284-07/MH/NIMH NIH HHS/ -- R21 MH080206/MH/NIMH NIH HHS/ -- R21 MH080206-01/MH/NIMH NIH HHS/ -- R21 MH080206-02/MH/NIMH NIH HHS/ -- England -- Nature. 2010 Mar 25;464(7288):597-600. doi: 10.1038/nature08848. Epub 2010 Mar 17.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉National Center for Behavioral Genomics, Waltham, Massachusetts 02454, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20237474" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Conserved Sequence ; Drosophila Proteins/chemistry/genetics/*metabolism ; Drosophila melanogaster/classification/genetics/*metabolism ; Evolution, Molecular ; Gene Expression Profiling ; Gene Expression Regulation ; Humans ; Molecular Sequence Data ; Mutation ; Phylogeny ; Sensory Receptor Cells/*metabolism ; TRPC Cation Channels/chemistry/genetics/*metabolism ; Taste Perception/physiology
    Print ISSN: 0028-0836
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 5
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    Whole-genome resequencing reveals loci under selection during chicken domestication (2010)
    Nature Publishing Group (NPG)
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    Publication Date: 2010-03-12
    Description: Domestic animals are excellent models for genetic studies of phenotypic evolution. They have evolved genetic adaptations to a new environment, the farm, and have been subjected to strong human-driven selection leading to remarkable phenotypic changes in morphology, physiology and behaviour. Identifying the genetic changes underlying these developments provides new insight into general mechanisms by which genetic variation shapes phenotypic diversity. Here we describe the use of massively parallel sequencing to identify selective sweeps of favourable alleles and candidate mutations that have had a prominent role in the domestication of chickens (Gallus gallus domesticus) and their subsequent specialization into broiler (meat-producing) and layer (egg-producing) chickens. We have generated 44.5-fold coverage of the chicken genome using pools of genomic DNA representing eight different populations of domestic chickens as well as red jungle fowl (Gallus gallus), the major wild ancestor. We report more than 7,000,000 single nucleotide polymorphisms, almost 1,300 deletions and a number of putative selective sweeps. One of the most striking selective sweeps found in all domestic chickens occurred at the locus for thyroid stimulating hormone receptor (TSHR), which has a pivotal role in metabolic regulation and photoperiod control of reproduction in vertebrates. Several of the selective sweeps detected in broilers overlapped genes associated with growth, appetite and metabolic regulation. We found little evidence that selection for loss-of-function mutations had a prominent role in chicken domestication, but we detected two deletions in coding sequences that we suggest are functionally important. This study has direct application to animal breeding and enhances the importance of the domestic chicken as a model organism for biomedical research.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rubin, Carl-Johan -- Zody, Michael C -- Eriksson, Jonas -- Meadows, Jennifer R S -- Sherwood, Ellen -- Webster, Matthew T -- Jiang, Lin -- Ingman, Max -- Sharpe, Ted -- Ka, Sojeong -- Hallbook, Finn -- Besnier, Francois -- Carlborg, Orjan -- Bed'hom, Bertrand -- Tixier-Boichard, Michele -- Jensen, Per -- Siegel, Paul -- Lindblad-Toh, Kerstin -- Andersson, Leif -- England -- Nature. 2010 Mar 25;464(7288):587-91. doi: 10.1038/nature08832. Epub 2010 Mar 10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medical Biochemistry and Microbiology, Uppsala University, Box 582, SE-75123 Uppsala, Sweden.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20220755" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Biological Evolution ; Chickens/*genetics ; Female ; Genetic Loci/*genetics ; Genome/*genetics ; Male ; Molecular Sequence Data ; Polymorphism, Single Nucleotide ; Selection, Genetic/*genetics ; Sequence Alignment ; Sequence Analysis, DNA ; Sequence Deletion
    Print ISSN: 0028-0836
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 6
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    A widespread family of polymorphic contact-dependent toxin delivery systems in bacteria (2010)
    Nature Publishing Group (NPG)
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    Publication Date: 2010-11-19
    Description: Bacteria have developed mechanisms to communicate and compete with one another in diverse environments. A new form of intercellular communication, contact-dependent growth inhibition (CDI), was discovered recently in Escherichia coli. CDI is mediated by the CdiB/CdiA two-partner secretion (TPS) system. CdiB facilitates secretion of the CdiA 'exoprotein' onto the cell surface. An additional small immunity protein (CdiI) protects CDI(+) cells from autoinhibition. The mechanisms by which CDI blocks cell growth and by which CdiI counteracts this growth arrest are unknown. Moreover, the existence of CDI activity in other bacteria has not been explored. Here we show that the CDI growth inhibitory activity resides within the carboxy-terminal region of CdiA (CdiA-CT), and that CdiI binds and inactivates cognate CdiA-CT, but not heterologous CdiA-CT. Bioinformatic and experimental analyses show that multiple bacterial species encode functional CDI systems with high sequence variability in the CdiA-CT and CdiI coding regions. CdiA-CT heterogeneity implies that a range of toxic activities are used during CDI. Indeed, CdiA-CTs from uropathogenic E. coli and the plant pathogen Dickeya dadantii have different nuclease activities, each providing a distinct mechanism of growth inhibition. Finally, we show that bacteria lacking the CdiA-CT and CdiI coding regions are unable to compete with isogenic wild-type CDI(+) cells both in laboratory media and on a eukaryotic host. Taken together, these results suggest that CDI systems constitute an intricate immunity network with an important function in bacterial competition.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3058911/" 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/PMC3058911/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Aoki, Stephanie K -- Diner, Elie J -- de Roodenbeke, Claire T'kint -- Burgess, Brandt R -- Poole, Stephen J -- Braaten, Bruce A -- Jones, Allison M -- Webb, Julia S -- Hayes, Christopher S -- Cotter, Peggy A -- Low, David A -- AI043986/AI/NIAID NIH HHS/ -- GM078634/GM/NIGMS NIH HHS/ -- R01 GM078634/GM/NIGMS NIH HHS/ -- U54 AI065359/AI/NIAID NIH HHS/ -- U54 AI065359-056074/AI/NIAID NIH HHS/ -- U54 AI065359-066074/AI/NIAID NIH HHS/ -- U54 AI065359-07/AI/NIAID NIH HHS/ -- U54AI065359/AI/NIAID NIH HHS/ -- England -- Nature. 2010 Nov 18;468(7322):439-42. doi: 10.1038/nature09490.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular, Cellular, and Developmental Biology, University of California - Santa Barbara (UCSB), Santa Barbara, California 93106-9625, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21085179" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Bacterial Toxins/chemistry/genetics/immunology/*metabolism ; Contact Inhibition/immunology/physiology ; Enterobacteriaceae/enzymology/genetics/metabolism ; Escherichia coli Proteins/antagonists & inhibitors/chemistry/genetics/metabolism ; Membrane Proteins/antagonists & inhibitors/chemistry/genetics/metabolism ; Molecular Sequence Data ; Uropathogenic Escherichia coli/enzymology/genetics/growth & ; development/*metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 7
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    PRDM9 is a major determinant of meiotic recombination hotspots in humans and mice (2010)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2010-01-02
    Description: Meiotic recombination events cluster into narrow segments of the genome, defined as hotspots. Here, we demonstrate that a major player for hotspot specification is the Prdm9 gene. First, two mouse strains that differ in hotspot usage are polymorphic for the zinc finger DNA binding array of PRDM9. Second, the human consensus PRDM9 allele is predicted to recognize the 13-mer motif enriched at human hotspots; this DNA binding specificity is verified by in vitro studies. Third, allelic variants of PRDM9 zinc fingers are significantly associated with variability in genome-wide hotspot usage among humans. Our results provide a molecular basis for the distribution of meiotic recombination in mammals, in which the binding of PRDM9 to specific DNA sequences targets the initiation of recombination at specific locations in the genome.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4295902/" 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/PMC4295902/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baudat, F -- Buard, J -- Grey, C -- Fledel-Alon, A -- Ober, C -- Przeworski, M -- Coop, G -- de Massy, B -- 03S1/PHS HHS/ -- GM83098/GM/NIGMS NIH HHS/ -- HD21244/HD/NICHD NIH HHS/ -- HL085197/HL/NHLBI NIH HHS/ -- R01 GM083098/GM/NIGMS NIH HHS/ -- R01 HD021244/HD/NICHD NIH HHS/ -- R01 HL085197/HL/NHLBI NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2010 Feb 12;327(5967):836-40. doi: 10.1126/science.1183439. Epub 2009 Dec 31.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institut de Genetique Humaine, UPR1142, CNRS, Montpellier, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20044539" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Amino Acid Sequence ; Animals ; Base Sequence ; Binding Sites ; DNA/chemistry/metabolism ; DNA Breaks, Double-Stranded ; DNA-Binding Proteins/chemistry/genetics/metabolism ; Genome ; Genome, Human ; Genotype ; Histone-Lysine N-Methyltransferase/chemistry/*genetics/*metabolism ; Humans ; Meiosis/*genetics ; Mice ; Mice, Inbred C57BL ; Molecular Sequence Data ; Phenotype ; *Recombination, Genetic ; Zinc Fingers/genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 8
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    Signatures of adaptation to obligate biotrophy in the Hyaloperonospora arabidopsidis genome (2010)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2010-12-15
    Description: Many oomycete and fungal plant pathogens are obligate biotrophs, which extract nutrients only from living plant tissue and cannot grow apart from their hosts. Although these pathogens cause substantial crop losses, little is known about the molecular basis or evolution of obligate biotrophy. Here, we report the genome sequence of the oomycete Hyaloperonospora arabidopsidis (Hpa), an obligate biotroph and natural pathogen of Arabidopsis thaliana. In comparison with genomes of related, hemibiotrophic Phytophthora species, the Hpa genome exhibits dramatic reductions in genes encoding (i) RXLR effectors and other secreted pathogenicity proteins, (ii) enzymes for assimilation of inorganic nitrogen and sulfur, and (iii) proteins associated with zoospore formation and motility. These attributes comprise a genomic signature of evolution toward obligate biotrophy.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3971456/" 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/PMC3971456/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baxter, Laura -- Tripathy, Sucheta -- Ishaque, Naveed -- Boot, Nico -- Cabral, Adriana -- Kemen, Eric -- Thines, Marco -- Ah-Fong, Audrey -- Anderson, Ryan -- Badejoko, Wole -- Bittner-Eddy, Peter -- Boore, Jeffrey L -- Chibucos, Marcus C -- Coates, Mary -- Dehal, Paramvir -- Delehaunty, Kim -- Dong, Suomeng -- Downton, Polly -- Dumas, Bernard -- Fabro, Georgina -- Fronick, Catrina -- Fuerstenberg, Susan I -- Fulton, Lucinda -- Gaulin, Elodie -- Govers, Francine -- Hughes, Linda -- Humphray, Sean -- Jiang, Rays H Y -- Judelson, Howard -- Kamoun, Sophien -- Kyung, Kim -- Meijer, Harold -- Minx, Patrick -- Morris, Paul -- Nelson, Joanne -- Phuntumart, Vipa -- Qutob, Dinah -- Rehmany, Anne -- Rougon-Cardoso, Alejandra -- Ryden, Peter -- Torto-Alalibo, Trudy -- Studholme, David -- Wang, Yuanchao -- Win, Joe -- Wood, Jo -- Clifton, Sandra W -- Rogers, Jane -- Van den Ackerveken, Guido -- Jones, Jonathan D G -- McDowell, John M -- Beynon, Jim -- Tyler, Brett M -- 079643/Wellcome Trust/United Kingdom -- BB/C509123/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- BB/E007120/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- BB/E024815/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- BB/E024882/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- BB/F0161901/Biotechnology and Biological Sciences Research Council/United Kingdom -- BB/G015244/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- EP/F500025/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- T12144/Biotechnology and Biological Sciences Research Council/United Kingdom -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 2010 Dec 10;330(6010):1549-51. doi: 10.1126/science.1195203.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉School of Life Sciences, Warwick University, Wellesbourne, CV35 9EF, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21148394" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptation, Physiological ; Amino Acid Sequence ; Arabidopsis/*parasitology ; Enzymes/genetics ; *Evolution, Molecular ; Gene Dosage ; Genes ; *Genome ; Host-Pathogen Interactions ; Metabolic Networks and Pathways/genetics ; Molecular Sequence Data ; Oomycetes/*genetics/*growth & development/pathogenicity/physiology ; Phytophthora/genetics ; Plant Diseases/*parasitology ; Polymorphism, Single Nucleotide ; Proteins/genetics ; Selection, Genetic ; Sequence Analysis, DNA ; Spores/physiology ; Synteny ; Virulence Factors/genetics
    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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    Genomic comparison of the ants Camponotus floridanus and Harpegnathos saltator (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-08-28
    Description: The organized societies of ants include short-lived worker castes displaying specialized behavior and morphology and long-lived queens dedicated to reproduction. We sequenced and compared the genomes of two socially divergent ant species: Camponotus floridanus and Harpegnathos saltator. Both genomes contained high amounts of CpG, despite the presence of DNA methylation, which in non-Hymenoptera correlates with CpG depletion. Comparison of gene expression in different castes identified up-regulation of telomerase and sirtuin deacetylases in longer-lived H. saltator reproductives, caste-specific expression of microRNAs and SMYD histone methyltransferases, and differential regulation of genes implicated in neuronal function and chemical communication. Our findings provide clues on the molecular differences between castes in these two ants and establish a new experimental model to study epigenetics in aging and behavior.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3772619/" 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/PMC3772619/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bonasio, Roberto -- Zhang, Guojie -- Ye, Chaoyang -- Mutti, Navdeep S -- Fang, Xiaodong -- Qin, Nan -- Donahue, Greg -- Yang, Pengcheng -- Li, Qiye -- Li, Cai -- Zhang, Pei -- Huang, Zhiyong -- Berger, Shelley L -- Reinberg, Danny -- Wang, Jun -- Liebig, Jurgen -- 2009005/Howard Hughes Medical Institute/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2010 Aug 27;329(5995):1068-71. doi: 10.1126/science.1192428.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, New York University School of Medicine, 522 First Avenue, New York, NY 10016, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20798317" target="_blank"〉PubMed〈/a〉
    Keywords: Aging/genetics ; Amino Acid Sequence ; Animals ; Ants/classification/*genetics/physiology ; Behavior, Animal ; DNA/chemistry/genetics ; Dinucleoside Phosphates/analysis ; *Epigenesis, Genetic ; Gene Expression Profiling ; Gene Expression Regulation ; *Genes, Insect ; *Genome ; Group III Histone Deacetylases/genetics/metabolism ; Hydrocarbons/metabolism ; Insect Proteins/chemistry/*genetics/metabolism ; MicroRNAs/genetics ; Molecular Sequence Data ; Protein Methyltransferases/genetics/metabolism ; Proteome ; Repetitive Sequences, Nucleic Acid ; Sequence Analysis, DNA ; Social Behavior ; Species Specificity ; Telomerase/genetics/metabolism
    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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  • 10
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    Partitioning of histone H3-H4 tetramers during DNA replication-dependent chromatin assembly (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-04-03
    Description: Semiconservative DNA replication ensures the faithful duplication of genetic information during cell divisions. However, how epigenetic information carried by histone modifications propagates through mitotic divisions remains elusive. To address this question, the DNA replication-dependent nucleosome partition pattern must be clarified. Here, we report significant amounts of H3.3-H4 tetramers split in vivo, whereas most H3.1-H4 tetramers remained intact. Inhibiting DNA replication-dependent deposition greatly reduced the level of splitting events, which suggests that (i) the replication-independent H3.3 deposition pathway proceeds largely by cooperatively incorporating two new H3.3-H4 dimers and (ii) the majority of splitting events occurred during replication-dependent deposition. Our results support the idea that "silent" histone modifications within large heterochromatic regions are maintained by copying modifications from neighboring preexisting histones without the need for H3-H4 splitting events.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Xu, Mo -- Long, Chengzu -- Chen, Xiuzhen -- Huang, Chang -- Chen, She -- Zhu, Bing -- New York, N.Y. -- Science. 2010 Apr 2;328(5974):94-8. doi: 10.1126/science.1178994.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Graduate Program, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, People's Republic of China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20360108" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Aphidicolin/pharmacology ; Cell Cycle ; Chromatin/metabolism ; *Chromatin Assembly and Disassembly ; *DNA Replication ; Epigenesis, Genetic ; HeLa Cells ; Heterochromatin/metabolism ; Histones/*chemistry/*metabolism ; Humans ; Hydroxyurea/pharmacology ; Mass Spectrometry ; Molecular Sequence Data ; Nucleosomes/*metabolism ; Protein Multimerization ; S Phase ; Transfection
    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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