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  • 1
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    The draft genome of Ciona intestinalis: insights into chordate and vertebrate origins (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-12-14
    Description: The first chordates appear in the fossil record at the time of the Cambrian explosion, nearly 550 million years ago. The modern ascidian tadpole represents a plausible approximation to these ancestral chordates. To illuminate the origins of chordate and vertebrates, we generated a draft of the protein-coding portion of the genome of the most studied ascidian, Ciona intestinalis. The Ciona genome contains approximately 16,000 protein-coding genes, similar to the number in other invertebrates, but only half that found in vertebrates. Vertebrate gene families are typically found in simplified form in Ciona, suggesting that ascidians contain the basic ancestral complement of genes involved in cell signaling and development. The ascidian genome has also acquired a number of lineage-specific innovations, including a group of genes engaged in cellulose metabolism that are related to those in bacteria and fungi.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dehal, Paramvir -- Satou, Yutaka -- Campbell, Robert K -- Chapman, Jarrod -- Degnan, Bernard -- De Tomaso, Anthony -- Davidson, Brad -- Di Gregorio, Anna -- Gelpke, Maarten -- Goodstein, David M -- Harafuji, Naoe -- Hastings, Kenneth E M -- Ho, Isaac -- Hotta, Kohji -- Huang, Wayne -- Kawashima, Takeshi -- Lemaire, Patrick -- Martinez, Diego -- Meinertzhagen, Ian A -- Necula, Simona -- Nonaka, Masaru -- Putnam, Nik -- Rash, Sam -- Saiga, Hidetoshi -- Satake, Masanobu -- Terry, Astrid -- Yamada, Lixy -- Wang, Hong-Gang -- Awazu, Satoko -- Azumi, Kaoru -- Boore, Jeffrey -- Branno, Margherita -- Chin-Bow, Stephen -- DeSantis, Rosaria -- Doyle, Sharon -- Francino, Pilar -- Keys, David N -- Haga, Shinobu -- Hayashi, Hiroko -- Hino, Kyosuke -- Imai, Kaoru S -- Inaba, Kazuo -- Kano, Shungo -- Kobayashi, Kenji -- Kobayashi, Mari -- Lee, Byung-In -- Makabe, Kazuhiro W -- Manohar, Chitra -- Matassi, Giorgio -- Medina, Monica -- Mochizuki, Yasuaki -- Mount, Steve -- Morishita, Tomomi -- Miura, Sachiko -- Nakayama, Akie -- Nishizaka, Satoko -- Nomoto, Hisayo -- Ohta, Fumiko -- Oishi, Kazuko -- Rigoutsos, Isidore -- Sano, Masako -- Sasaki, Akane -- Sasakura, Yasunori -- Shoguchi, Eiichi -- Shin-i, Tadasu -- Spagnuolo, Antoinetta -- Stainier, Didier -- Suzuki, Miho M -- Tassy, Olivier -- Takatori, Naohito -- Tokuoka, Miki -- Yagi, Kasumi -- Yoshizaki, Fumiko -- Wada, Shuichi -- Zhang, Cindy -- Hyatt, P Douglas -- Larimer, Frank -- Detter, Chris -- Doggett, Norman -- Glavina, Tijana -- Hawkins, Trevor -- Richardson, Paul -- Lucas, Susan -- Kohara, Yuji -- Levine, Michael -- Satoh, Nori -- Rokhsar, Daniel S -- HD-37105/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 2002 Dec 13;298(5601):2157-67.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉U.S. Department of Energy Joint Genome Institute, 2800 Mitchell Drive, Walnut Creek, CA 94598, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12481130" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Animals ; Apoptosis ; Base Sequence ; Cellulose/metabolism ; Central Nervous System/physiology ; Ciona intestinalis/anatomy & histology/classification/*genetics/physiology ; Computational Biology ; Endocrine System/physiology ; Gene Dosage ; Gene Duplication ; Genes ; Genes, Homeobox ; *Genome ; Heart/embryology/physiology ; Immunity/genetics ; Molecular Sequence Data ; Multigene Family ; Muscle Proteins/genetics ; Organizers, Embryonic/physiology ; Phylogeny ; Polymorphism, Genetic ; Proteins/genetics/physiology ; *Sequence Analysis, DNA ; Sequence Homology, Nucleic Acid ; Species Specificity ; Thyroid Gland/physiology ; Urochordata/genetics ; Vertebrates/anatomy & histology/classification/genetics/physiology
    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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    Self-assembling amphiphilic siderophores from marine bacteria (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-02-26
    Description: Most aerobic bacteria secrete siderophores to facilitate iron acquisition. Two families of siderophores were isolated from strains belonging to two different genera of marine bacteria. The aquachelins, from Halomonas aquamarina strain DS40M3, and the marinobactins, from Marinobacter sp. strains DS40M6 and DS40M8, each contain a unique peptidic head group that coordinates iron(III) and an appendage of one of a series of fatty acid moieties. These siderophores have low critical micelle concentrations (CMCs). In the absence of iron, the marinobactins are present as micelles at concentrations exceeding their CMC; upon addition of iron(III), the micelles undergo a spontaneous phase change to form vesicles. These observations suggest that unique iron acquisition mechanisms may have evolved in marine bacteria.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Martinez, J S -- Zhang, G P -- Holt, P D -- Jung, H T -- Carrano, C J -- Haygood, M G -- Butler, A -- GM38130/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2000 Feb 18;287(5456):1245-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA 93106-9510, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10678827" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acids/analysis ; Chemistry, Physical ; Cryoelectron Microscopy ; Evolution, Molecular ; Fatty Acids/analysis ; Ferric Compounds/metabolism ; Gammaproteobacteria/*chemistry/isolation & purification/metabolism ; Halomonas/*chemistry/isolation & purification/metabolism ; Light ; Micelles ; Phylogeny ; Physicochemical Phenomena ; Scattering, Radiation ; Seawater/microbiology ; Siderophores/*chemistry/isolation & purification/metabolism ; Surface Properties
    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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  • 3
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    The dynamic genome of Hydra (2010)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2010-03-17
    Description: The freshwater cnidarian Hydra was first described in 1702 and has been the object of study for 300 years. Experimental studies of Hydra between 1736 and 1744 culminated in the discovery of asexual reproduction of an animal by budding, the first description of regeneration in an animal, and successful transplantation of tissue between animals. Today, Hydra is an important model for studies of axial patterning, stem cell biology and regeneration. Here we report the genome of Hydra magnipapillata and compare it to the genomes of the anthozoan Nematostella vectensis and other animals. The Hydra genome has been shaped by bursts of transposable element expansion, horizontal gene transfer, trans-splicing, and simplification of gene structure and gene content that parallel simplification of the Hydra life cycle. We also report the sequence of the genome of a novel bacterium stably associated with H. magnipapillata. Comparisons of the Hydra genome to the genomes of other animals shed light on the evolution of epithelia, contractile tissues, developmentally regulated transcription factors, the Spemann-Mangold organizer, pluripotency genes and the neuromuscular junction.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4479502/" 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/PMC4479502/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chapman, Jarrod A -- Kirkness, Ewen F -- Simakov, Oleg -- Hampson, Steven E -- Mitros, Therese -- Weinmaier, Thomas -- Rattei, Thomas -- Balasubramanian, Prakash G -- Borman, Jon -- Busam, Dana -- Disbennett, Kathryn -- Pfannkoch, Cynthia -- Sumin, Nadezhda -- Sutton, Granger G -- Viswanathan, Lakshmi Devi -- Walenz, Brian -- Goodstein, David M -- Hellsten, Uffe -- Kawashima, Takeshi -- Prochnik, Simon E -- Putnam, Nicholas H -- Shu, Shengquiang -- Blumberg, Bruce -- Dana, Catherine E -- Gee, Lydia -- Kibler, Dennis F -- Law, Lee -- Lindgens, Dirk -- Martinez, Daniel E -- Peng, Jisong -- Wigge, Philip A -- Bertulat, Bianca -- Guder, Corina -- Nakamura, Yukio -- Ozbek, Suat -- Watanabe, Hiroshi -- Khalturin, Konstantin -- Hemmrich, Georg -- Franke, Andre -- Augustin, Rene -- Fraune, Sebastian -- Hayakawa, Eisuke -- Hayakawa, Shiho -- Hirose, Mamiko -- Hwang, Jung Shan -- Ikeo, Kazuho -- Nishimiya-Fujisawa, Chiemi -- Ogura, Atshushi -- Takahashi, Toshio -- Steinmetz, Patrick R H -- Zhang, Xiaoming -- Aufschnaiter, Roland -- Eder, Marie-Kristin -- Gorny, Anne-Kathrin -- Salvenmoser, Willi -- Heimberg, Alysha M -- Wheeler, Benjamin M -- Peterson, Kevin J -- Bottger, Angelika -- Tischler, Patrick -- Wolf, Alexander -- Gojobori, Takashi -- Remington, Karin A -- Strausberg, Robert L -- Venter, J Craig -- Technau, Ulrich -- Hobmayer, Bert -- Bosch, Thomas C G -- Holstein, Thomas W -- Fujisawa, Toshitaka -- Bode, Hans R -- David, Charles N -- Rokhsar, Daniel S -- Steele, Robert E -- P 21108/Austrian Science Fund FWF/Austria -- R24 RR015088/RR/NCRR NIH HHS/ -- England -- Nature. 2010 Mar 25;464(7288):592-6. doi: 10.1038/nature08830. Epub 2010 Mar 14.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉US Department of Energy Joint Genome Institute, Walnut Creek, California 94598, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20228792" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anthozoa/genetics ; Comamonadaceae/genetics ; DNA Transposable Elements/genetics ; Gene Transfer, Horizontal/genetics ; Genome/*genetics ; Genome, Bacterial/genetics ; Hydra/*genetics/microbiology/ultrastructure ; Molecular Sequence Data ; Neuromuscular Junction/ultrastructure
    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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  • 4
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    Chemical genetics of Plasmodium falciparum (2010)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2010-05-21
    Description: Malaria caused by Plasmodium falciparum is a disease that is responsible for 880,000 deaths per year worldwide. Vaccine development has proved difficult and resistance has emerged for most antimalarial drugs. To discover new antimalarial chemotypes, we have used a phenotypic forward chemical genetic approach to assay 309,474 chemicals. Here we disclose structures and biological activity of the entire library-many of which showed potent in vitro activity against drug-resistant P. falciparum strains-and detailed profiling of 172 representative candidates. A reverse chemical genetic study identified 19 new inhibitors of 4 validated drug targets and 15 novel binders among 61 malarial proteins. Phylochemogenetic profiling in several organisms revealed similarities between Toxoplasma gondii and mammalian cell lines and dissimilarities between P. falciparum and related protozoans. One exemplar compound displayed efficacy in a murine model. Our findings provide the scientific community with new starting points for malaria drug discovery.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2874979/" 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/PMC2874979/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Guiguemde, W Armand -- Shelat, Anang A -- Bouck, David -- Duffy, Sandra -- Crowther, Gregory J -- Davis, Paul H -- Smithson, David C -- Connelly, Michele -- Clark, Julie -- Zhu, Fangyi -- Jimenez-Diaz, Maria B -- Martinez, Maria S -- Wilson, Emily B -- Tripathi, Abhai K -- Gut, Jiri -- Sharlow, Elizabeth R -- Bathurst, Ian -- El Mazouni, Farah -- Fowble, Joseph W -- Forquer, Isaac -- McGinley, Paula L -- Castro, Steve -- Angulo-Barturen, Inigo -- Ferrer, Santiago -- Rosenthal, Philip J -- Derisi, Joseph L -- Sullivan, David J -- Lazo, John S -- Roos, David S -- Riscoe, Michael K -- Phillips, Margaret A -- Rathod, Pradipsinh K -- Van Voorhis, Wesley C -- Avery, Vicky M -- Guy, R Kiplin -- AI045774/AI/NIAID NIH HHS/ -- AI053680/AI/NIAID NIH HHS/ -- AI067921/AI/NIAID NIH HHS/ -- AI075517/AI/NIAID NIH HHS/ -- AI075594/AI/NIAID NIH HHS/ -- AI080625/AI/NIAID NIH HHS/ -- AI082617/AI/NIAID NIH HHS/ -- AI28724/AI/NIAID NIH HHS/ -- AI35707/AI/NIAID NIH HHS/ -- AI53862/AI/NIAID NIH HHS/ -- AI772682/AI/NIAID NIH HHS/ -- CA78039/CA/NCI NIH HHS/ -- F32 AI077268/AI/NIAID NIH HHS/ -- F32 AI077268-03/AI/NIAID NIH HHS/ -- P01 AI035707/AI/NIAID NIH HHS/ -- P01 AI035707-140007/AI/NIAID NIH HHS/ -- P01 CA078039-10/CA/NCI NIH HHS/ -- P41 RR001614/RR/NCRR NIH HHS/ -- P41 RR001614-246970/RR/NCRR NIH HHS/ -- R01 AI045774/AI/NIAID NIH HHS/ -- R01 AI045774-09/AI/NIAID NIH HHS/ -- R37 AI028724/AI/NIAID NIH HHS/ -- R37 AI028724-17/AI/NIAID NIH HHS/ -- R56 AI082617/AI/NIAID NIH HHS/ -- R56 AI082617-01/AI/NIAID NIH HHS/ -- U01 AI053862/AI/NIAID NIH HHS/ -- U01 AI053862-05/AI/NIAID NIH HHS/ -- U01 AI075594-03/AI/NIAID NIH HHS/ -- UL1 TR000005/TR/NCATS NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2010 May 20;465(7296):311-5. doi: 10.1038/nature09099.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemical Biology and Therapeutics, St Jude Children's Research Hospital, Memphis, Tennessee 38105, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20485428" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antimalarials/*analysis/isolation & purification/*pharmacology ; Cell Line ; *Drug Discovery ; Drug Evaluation, Preclinical ; Drug Resistance/drug effects ; Drug Therapy, Combination ; Erythrocytes/drug effects/parasitology ; Humans ; Malaria, Falciparum/drug therapy/parasitology ; Mice ; Phenotype ; Phylogeny ; Plasmodium falciparum/*drug effects/*genetics/metabolism ; Reproducibility of Results ; Small Molecule Libraries/chemistry/pharmacology
    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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  • 5
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    Archaeorhizomycetes: unearthing an ancient class of ubiquitous soil fungi (2011)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2011-08-13
    Description: Estimates suggest that only one-tenth of the true fungal diversity has been described. Among numerous fungal lineages known only from environmental DNA sequences, Soil Clone Group 1 is the most ubiquitous. These globally distributed fungi may dominate below-ground fungal communities, but their placement in the fungal tree of life has been uncertain. Here, we report cultures of this group and describe the class, Archaeorhizomycetes, phylogenetically placed within subphylum Taphrinomycotina in the Ascomycota. Archaeorhizomycetes comprises hundreds of cryptically reproducing filamentous species that do not form recognizable mycorrhizal structures and have saprotrophic potential, yet are omnipresent in roots and rhizosphere soil and show ecosystem and host root habitat specificity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rosling, Anna -- Cox, Filipa -- Cruz-Martinez, Karelyn -- Ihrmark, Katarina -- Grelet, Gwen-Aelle -- Lindahl, Bjorn D -- Menkis, Audrius -- James, Timothy Y -- New York, N.Y. -- Science. 2011 Aug 12;333(6044):876-9. doi: 10.1126/science.1206958.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Forest Mycology and Pathology, Uppsala BioCentre, SLU, Box 7026, 750 07 Uppsala, Sweden. anna.rosling@slu.se〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21836015" target="_blank"〉PubMed〈/a〉
    Keywords: *Ascomycota/classification/genetics/growth & development/isolation & purification ; Coniferophyta/microbiology ; *Ecosystem ; Genes, Fungal ; Genes, rRNA ; Meristem/*microbiology ; Molecular Sequence Data ; *Mycorrhizae/classification/genetics ; Phylogeny ; Rhizosphere ; *Soil Microbiology
    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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  • 6
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    HSPC117 is the essential subunit of a human tRNA splicing ligase complex (2011)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2011-02-12
    Description: Splicing of mammalian precursor transfer RNA (tRNA) molecules involves two enzymatic steps. First, intron removal by the tRNA splicing endonuclease generates separate 5' and 3' exons. In animals, the second step predominantly entails direct exon ligation by an elusive RNA ligase. Using activity-guided purification of tRNA ligase from HeLa cell extracts, we identified HSPC117, a member of the UPF0027 (RtcB) family, as the essential subunit of a tRNA ligase complex. RNA interference-mediated depletion of HSPC117 inhibited maturation of intron-containing pre-tRNA both in vitro and in living cells. The high sequence conservation of HSPC117/RtcB proteins is suggestive of RNA ligase roles of this protein family in various organisms.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Popow, Johannes -- Englert, Markus -- Weitzer, Stefan -- Schleiffer, Alexander -- Mierzwa, Beata -- Mechtler, Karl -- Trowitzsch, Simon -- Will, Cindy L -- Luhrmann, Reinhard -- Soll, Dieter -- Martinez, Javier -- New York, N.Y. -- Science. 2011 Feb 11;331(6018):760-4. doi: 10.1126/science.1197847.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), A-1030 Vienna, Austria.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21311021" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Exons ; HeLa Cells ; Humans ; Introns ; Molecular Sequence Data ; Proteins/*chemistry/isolation & purification/*metabolism ; RNA Interference ; RNA Ligase (ATP)/*chemistry/isolation & purification/*metabolism ; RNA Precursors/*metabolism ; *RNA Splicing ; RNA, Transfer/*metabolism ; Spliceosomes/metabolism
    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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  • 7
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    The protein kinase complement of the human genome (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-12-10
    Description: We have catalogued the protein kinase complement of the human genome (the "kinome") using public and proprietary genomic, complementary DNA, and expressed sequence tag (EST) sequences. This provides a starting point for comprehensive analysis of protein phosphorylation in normal and disease states, as well as a detailed view of the current state of human genome analysis through a focus on one large gene family. We identify 518 putative protein kinase genes, of which 71 have not previously been reported or described as kinases, and we extend or correct the protein sequences of 56 more kinases. New genes include members of well-studied families as well as previously unidentified families, some of which are conserved in model organisms. Classification and comparison with model organism kinomes identified orthologous groups and highlighted expansions specific to human and other lineages. We also identified 106 protein kinase pseudogenes. Chromosomal mapping revealed several small clusters of kinase genes and revealed that 244 kinases map to disease loci or cancer amplicons.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Manning, G -- Whyte, D B -- Martinez, R -- Hunter, T -- Sudarsanam, S -- New York, N.Y. -- Science. 2002 Dec 6;298(5600):1912-34.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉SUGEN Inc., 230 East Grand Avenue, South San Francisco, CA 94080, USA. gerard-manning@sugen.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12471243" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Catalysis ; Chromosome Mapping ; Computational Biology ; Databases, Genetic ; Genes ; *Genome, Human ; Humans ; Neoplasms/genetics ; Phylogeny ; Protein Kinases/chemistry/classification/*genetics/*metabolism ; Protein Structure, Tertiary ; Pseudogenes ; Sequence Analysis, DNA ; Signal Transduction
    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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    The genome of the diatom Thalassiosira pseudonana: ecology, evolution, and metabolism (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-10-02
    Description: Diatoms are unicellular algae with plastids acquired by secondary endosymbiosis. They are responsible for approximately 20% of global carbon fixation. We report the 34 million-base pair draft nuclear genome of the marine diatom Thalassiosira pseudonana and its 129 thousand-base pair plastid and 44 thousand-base pair mitochondrial genomes. Sequence and optical restriction mapping revealed 24 diploid nuclear chromosomes. We identified novel genes for silicic acid transport and formation of silica-based cell walls, high-affinity iron uptake, biosynthetic enzymes for several types of polyunsaturated fatty acids, use of a range of nitrogenous compounds, and a complete urea cycle, all attributes that allow diatoms to prosper in aquatic environments.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Armbrust, E Virginia -- Berges, John A -- Bowler, Chris -- Green, Beverley R -- Martinez, Diego -- Putnam, Nicholas H -- Zhou, Shiguo -- Allen, Andrew E -- Apt, Kirk E -- Bechner, Michael -- Brzezinski, Mark A -- Chaal, Balbir K -- Chiovitti, Anthony -- Davis, Aubrey K -- Demarest, Mark S -- Detter, J Chris -- Glavina, Tijana -- Goodstein, David -- Hadi, Masood Z -- Hellsten, Uffe -- Hildebrand, Mark -- Jenkins, Bethany D -- Jurka, Jerzy -- Kapitonov, Vladimir V -- Kroger, Nils -- Lau, Winnie W Y -- Lane, Todd W -- Larimer, Frank W -- Lippmeier, J Casey -- Lucas, Susan -- Medina, Monica -- Montsant, Anton -- Obornik, Miroslav -- Parker, Micaela Schnitzler -- Palenik, Brian -- Pazour, Gregory J -- Richardson, Paul M -- Rynearson, Tatiana A -- Saito, Mak A -- Schwartz, David C -- Thamatrakoln, Kimberlee -- Valentin, Klaus -- Vardi, Assaf -- Wilkerson, Frances P -- Rokhsar, Daniel S -- New York, N.Y. -- Science. 2004 Oct 1;306(5693):79-86.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉School of Oceanography, University of Washington, Seattle, WA 98195, USA. armbrust@ocean.washington.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15459382" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptation, Physiological ; Algal Proteins/chemistry/genetics/physiology ; Animals ; *Biological Evolution ; Cell Nucleus/genetics ; Chromosomes ; DNA/genetics ; Diatoms/chemistry/cytology/*genetics/metabolism ; *Ecosystem ; Energy Metabolism ; *Genome ; Iron/metabolism ; Light ; Light-Harvesting Protein Complexes/chemistry/genetics/metabolism ; Mitochondria/genetics ; Molecular Sequence Data ; Nitrogen/metabolism ; Photosynthesis ; Plastids/genetics ; Restriction Mapping ; Sequence Alignment ; *Sequence Analysis, DNA ; Silicic Acid/metabolism ; Symbiosis ; Urea/metabolism
    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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  • 9
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    Antifungal drug resistance evoked via RNAi-dependent epimutations (2014)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2014-08-01
    Description: Microorganisms evolve via a range of mechanisms that may include or involve sexual/parasexual reproduction, mutators, aneuploidy, Hsp90 and even prions. Mechanisms that may seem detrimental can be repurposed to generate diversity. Here we show that the human fungal pathogen Mucor circinelloides develops spontaneous resistance to the antifungal drug FK506 (tacrolimus) via two distinct mechanisms. One involves Mendelian mutations that confer stable drug resistance; the other occurs via an epigenetic RNA interference (RNAi)-mediated pathway resulting in unstable drug resistance. The peptidylprolyl isomerase FKBP12 interacts with FK506 forming a complex that inhibits the protein phosphatase calcineurin. Calcineurin inhibition by FK506 blocks M. circinelloides transition to hyphae and enforces yeast growth. Mutations in the fkbA gene encoding FKBP12 or the calcineurin cnbR or cnaA genes confer FK506 resistance and restore hyphal growth. In parallel, RNAi is spontaneously triggered to silence the fkbA gene, giving rise to drug-resistant epimutants. FK506-resistant epimutants readily reverted to the drug-sensitive wild-type phenotype when grown without exposure to the drug. The establishment of these epimutants is accompanied by generation of abundant fkbA small RNAs and requires the RNAi pathway as well as other factors that constrain or reverse the epimutant state. Silencing involves the generation of a double-stranded RNA trigger intermediate using the fkbA mature mRNA as a template to produce antisense fkbA RNA. This study uncovers a novel epigenetic RNAi-based epimutation mechanism controlling phenotypic plasticity, with possible implications for antimicrobial drug resistance and RNAi-regulatory mechanisms in fungi and other eukaryotes.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4177005/" 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/PMC4177005/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Calo, Silvia -- Shertz-Wall, Cecelia -- Lee, Soo Chan -- Bastidas, Robert J -- Nicolas, Francisco E -- Granek, Joshua A -- Mieczkowski, Piotr -- Torres-Martinez, Santiago -- Ruiz-Vazquez, Rosa M -- Cardenas, Maria E -- Heitman, Joseph -- R01 AI039115/AI/NIAID NIH HHS/ -- R01 AI50438-10/AI/NIAID NIH HHS/ -- R01 CA154499/CA/NCI NIH HHS/ -- R01 CA154499-04/CA/NCI NIH HHS/ -- R37 AI039115/AI/NIAID NIH HHS/ -- R37 AI39115-17/AI/NIAID NIH HHS/ -- England -- Nature. 2014 Sep 25;513(7519):555-8. doi: 10.1038/nature13575. Epub 2014 Jul 27.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina 27710, USA. ; 1] Regional Campus of International Excellence "Campus Mare Nostrum", Murcia 30100, Spain [2] Department of Genetics and Microbiology, Faculty of Biology, University of Murcia, Murcia 30100, Spain. ; 1] Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina 27710, USA [2] Department of Biostatistics and Bioinformatics, Duke University Medical Center, Durham, North Carolina 27710, USA [3] Duke Center for the Genomics of Microbial Systems, Duke University Medical Center, Durham, North Carolina 27710, USA. ; High-Throughput Sequencing Facility, University of North Carolina, Chapel Hill, North Carolina 27599, USA. ; Department of Genetics and Microbiology, Faculty of Biology, University of Murcia, Murcia 30100, Spain.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25079329" target="_blank"〉PubMed〈/a〉
    Keywords: Calcineurin/genetics/metabolism ; Calcineurin Inhibitors ; Drug Resistance, Fungal/*genetics ; Epigenesis, Genetic/*genetics ; Humans ; Hyphae/drug effects/genetics/growth & development ; Molecular Sequence Data ; Mucor/*drug effects/*genetics/growth & development ; Mucormycosis/drug therapy/microbiology ; Mutation/*genetics ; Phenotype ; *RNA Interference ; Tacrolimus/metabolism/*pharmacology ; Tacrolimus Binding Protein 1A/deficiency/genetics/metabolism
    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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    Fungal lipochitooligosaccharide symbiotic signals in arbuscular mycorrhiza (2011)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2011-01-07
    Description: Arbuscular mycorrhiza (AM) is a root endosymbiosis between plants and glomeromycete fungi. It is the most widespread terrestrial plant symbiosis, improving plant uptake of water and mineral nutrients. Yet, despite its crucial role in land ecosystems, molecular mechanisms leading to its formation are just beginning to be unravelled. Recent evidence suggests that AM fungi produce diffusible symbiotic signals. Here we show that Glomus intraradices secretes symbiotic signals that are a mixture of sulphated and non-sulphated simple lipochitooligosaccharides (LCOs), which stimulate formation of AM in plant species of diverse families (Fabaceae, Asteraceae and Umbelliferae). In the legume Medicago truncatula these signals stimulate root growth and branching by the symbiotic DMI signalling pathway. These findings provide a better understanding of the evolution of signalling mechanisms involved in plant root endosymbioses and will greatly facilitate their molecular dissection. They also open the way to using these natural and very active molecules in agriculture.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Maillet, Fabienne -- Poinsot, Verena -- Andre, Olivier -- Puech-Pages, Virginie -- Haouy, Alexandra -- Gueunier, Monique -- Cromer, Laurence -- Giraudet, Delphine -- Formey, Damien -- Niebel, Andreas -- Martinez, Eduardo Andres -- Driguez, Hugues -- Becard, Guillaume -- Denarie, Jean -- England -- Nature. 2011 Jan 6;469(7328):58-63. doi: 10.1038/nature09622.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratoire des Interactions Plantes-Microorganismes, UMR 441/2594 INRA-CNRS, B.P. 52627, F-31326 Castanet-Tolosan CEDEX, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21209659" target="_blank"〉PubMed〈/a〉
    Keywords: Carbohydrate Sequence ; Chromatography, High Pressure Liquid ; Daucus carota/chemistry/metabolism/microbiology ; Glomeromycota/metabolism ; Lipopolysaccharides/chemistry/*metabolism ; Medicago truncatula/chemistry/growth & development/metabolism/microbiology ; Molecular Sequence Data ; Mycorrhizae/*metabolism ; Plant Extracts/chemistry/metabolism ; Plant Roots/chemistry/growth & development/*metabolism/*microbiology ; Signal Transduction ; Spores, Fungal/chemistry/metabolism ; *Symbiosis
    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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