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  • 1
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    The composite genome of the legume symbiont Sinorhizobium meliloti (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-07-28
    Description: The scarcity of usable nitrogen frequently limits plant growth. A tight metabolic association with rhizobial bacteria allows legumes to obtain nitrogen compounds by bacterial reduction of dinitrogen (N2) to ammonium (NH4+). We present here the annotated DNA sequence of the alpha-proteobacterium Sinorhizobium meliloti, the symbiont of alfalfa. The tripartite 6.7-megabase (Mb) genome comprises a 3.65-Mb chromosome, and 1.35-Mb pSymA and 1.68-Mb pSymB megaplasmids. Genome sequence analysis indicates that all three elements contribute, in varying degrees, to symbiosis and reveals how this genome may have emerged during evolution. The genome sequence will be useful in understanding the dynamics of interkingdom associations and of life in soil environments.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Galibert, F -- Finan, T M -- Long, S R -- Puhler, A -- Abola, P -- Ampe, F -- Barloy-Hubler, F -- Barnett, M J -- Becker, A -- Boistard, P -- Bothe, G -- Boutry, M -- Bowser, L -- Buhrmester, J -- Cadieu, E -- Capela, D -- Chain, P -- Cowie, A -- Davis, R W -- Dreano, S -- Federspiel, N A -- Fisher, R F -- Gloux, S -- Godrie, T -- Goffeau, A -- Golding, B -- Gouzy, J -- Gurjal, M -- Hernandez-Lucas, I -- Hong, A -- Huizar, L -- Hyman, R W -- Jones, T -- Kahn, D -- Kahn, M L -- Kalman, S -- Keating, D H -- Kiss, E -- Komp, C -- Lelaure, V -- Masuy, D -- Palm, C -- Peck, M C -- Pohl, T M -- Portetelle, D -- Purnelle, B -- Ramsperger, U -- Surzycki, R -- Thebault, P -- Vandenbol, M -- Vorholter, F J -- Weidner, S -- Wells, D H -- Wong, K -- Yeh, K C -- Batut, J -- GM30962/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2001 Jul 27;293(5530):668-72.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉UMR6061-CNRS, Laboratoire de Genetique et Developpement, Faculte de Medecine, 2 avenue du Pr. Leon Bernard, F-35043 Rennes cedex, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11474104" target="_blank"〉PubMed〈/a〉
    Keywords: Bacterial Adhesion ; Bacterial Proteins/genetics ; Carrier Proteins/genetics ; Chromosomes, Bacterial/genetics ; Computational Biology ; DNA Transposable Elements ; Energy Metabolism/genetics ; Evolution, Molecular ; Gene Duplication ; Genes, Bacterial ; Genes, Essential ; Genes, Regulator ; *Genome, Bacterial ; Medicago sativa/microbiology ; Nitrogen/metabolism ; Nitrogen Fixation/genetics ; Plasmids ; Polysaccharides, Bacterial/genetics ; Replicon ; Rhizobiaceae/genetics ; *Sequence Analysis, DNA ; Sinorhizobium meliloti/*genetics/physiology ; Symbiosis/*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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  • 2
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    Depolarization of alfalfa root hair membrane potential by Rhizobium meliloti Nod factors (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-05-15
    Description: Although much is known about the bacterial genetics of early nodulation, little is known about the plant cell response. Alfalfa root hair cells were impaled with intracellular microelectrodes to measure a membrane potential depolarizing activity in Rhizobium meliloti cell-free filtrates, a plant response dependent on the bacterial nodulation genes. The depolarization was desensitized by repeated exposure to factors and was not observed in a representative nonlegume. A purified extracellular Nod factor, NodRm-IV(S), caused membrane potential depolarization at nanomolar concentrations. This rapid single-cell assay provides a tool for dissecting the mechanisms of host cell response in early nodulation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ehrhardt, D W -- Atkinson, E M -- Long, S R -- New York, N.Y. -- Science. 1992 May 15;256(5059):998-1000.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Sciences, Stanford University, Stanford CA 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10744524" target="_blank"〉PubMed〈/a〉
    Keywords: Lipopolysaccharides/*pharmacology ; Medicago sativa/cytology/*physiology ; Membrane Potentials/drug effects ; Plant Roots/cytology/drug effects/*physiology ; Sinorhizobium meliloti/physiology
    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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    An open letter to Elias Zerhouni (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-03-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Altman, Sidney -- Bassler, Bonnie L -- Beckwith, Jon -- Belfort, Marlene -- Berg, Howard C -- Bloom, Barry -- Brenchley, Jean E -- Campbell, Allan -- Collier, R John -- Connell, Nancy -- Cozzarelli, Nicholas R -- Craig, Nancy L -- Darst, Seth -- Ebright, Richard H -- Elledge, Stephen J -- Falkow, Stanley -- Galan, Jorge E -- Gottesman, Max -- Gourse, Richard -- Grindley, Nigel D F -- Gross, Carol A -- Grossman, Alan -- Hochschild, Ann -- Howe, Martha -- Hurwitz, Jerard -- Isberg, Ralph R -- Kaplan, Samuel -- Kornberg, Arthur -- Kustu, Sydney G -- Landick, Robert C -- Landy, Arthur -- Levy, Stuart B -- Losick, Richard -- Long, Sharon R -- Maloy, Stanley R -- Mekalanos, John J -- Neidhardt, Frederick C -- Pace, Norman R -- Ptashne, Mark -- Roberts, Jeffrey W -- Roth, John R -- Rothman-Denes, Lucia B -- Salyers, Abigail -- Schaechter, Moselio -- Shapiro, Lucy -- Silhavy, Thomas J -- Simon, Melvin I -- Walker, Graham -- Yanofsky, Charles -- Zinder, Norton -- New York, N.Y. -- Science. 2005 Mar 4;307(5714):1409-10.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15746409" target="_blank"〉PubMed〈/a〉
    Keywords: Biological Warfare ; *Biomedical Research/economics ; *Bioterrorism ; Financing, Government ; *Microbiology ; *National Institutes of Health (U.S.) ; Peer Review, Research ; Public Health ; *Research Support as Topic ; United States
    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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    Nodulation signaling in legumes requires NSP2, a member of the GRAS family of transcriptional regulators (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-06-18
    Description: Rhizobial bacteria enter a symbiotic interaction with legumes, activating diverse responses in roots through the lipochito oligosaccharide signaling molecule Nod factor. Here, we show that NSP2 from Medicago truncatula encodes a GRAS protein essential for Nod-factor signaling. NSP2 functions downstream of Nod-factor-induced calcium spiking and a calcium/calmodulin-dependent protein kinase. We show that NSP2-GFP expressed from a constitutive promoter is localized to the endoplasmic reticulum/nuclear envelope and relocalizes to the nucleus after Nod-factor elicitation. This work provides evidence that a GRAS protein transduces calcium signals in plants and provides a possible regulator of Nod-factor-inducible gene expression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kalo, Peter -- Gleason, Cynthia -- Edwards, Anne -- Marsh, John -- Mitra, Raka M -- Hirsch, Sibylle -- Jakab, Julia -- Sims, Sarah -- Long, Sharon R -- Rogers, Jane -- Kiss, Gyorgy B -- Downie, J Allan -- Oldroyd, Giles E D -- New York, N.Y. -- Science. 2005 Jun 17;308(5729):1786-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Departments of Disease and Stress Biology and Molecular Microbiology, John Innes Centre, Norwich NR4 7UH, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15961668" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Amino Acid Sequence ; Calcium/metabolism ; Calcium Signaling ; Calcium-Calmodulin-Dependent Protein Kinases/genetics/metabolism ; Cell Nucleus/metabolism ; Cloning, Molecular ; Gene Expression Regulation, Plant ; Genes, Plant ; Lipopolysaccharides/*metabolism ; Medicago/genetics/*metabolism/*microbiology ; Molecular Sequence Data ; Mutation ; Oligonucleotide Array Sequence Analysis ; Peas/genetics/metabolism ; Plant Proteins/chemistry/genetics/*metabolism ; Protein Structure, Tertiary ; Recombinant Fusion Proteins/metabolism ; *Signal Transduction ; Sinorhizobium meliloti/*physiology ; Symbiosis ; Transcription Factors/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
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  • 5
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    Medicago truncatula DMI1 required for bacterial and fungal symbioses in legumes (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-02-14
    Description: Legumes form symbiotic associations with both mycorrhizal fungi and nitrogen-fixing soil bacteria called rhizobia. Several of the plant genes required for transduction of rhizobial signals, the Nod factors, are also necessary for mycorrhizal symbiosis. Here, we describe the cloning and characterization of one such gene from the legume Medicago truncatula. The DMI1 (does not make infections) gene encodes a novel protein with low global similarity to a ligand-gated cation channel domain of archaea. The protein is highly conserved in angiosperms and ancestral to land plants. We suggest that DMI1 represents an ancient plant-specific innovation, potentially enabling mycorrhizal associations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ane, Jean-Michel -- Kiss, Gyorgy B -- Riely, Brendan K -- Penmetsa, R Varma -- Oldroyd, Giles E D -- Ayax, Celine -- Levy, Julien -- Debelle, Frederic -- Baek, Jong-Min -- Kalo, Peter -- Rosenberg, Charles -- Roe, Bruce A -- Long, Sharon R -- Denarie, Jean -- Cook, Douglas R -- New York, N.Y. -- Science. 2004 Feb 27;303(5662):1364-7. Epub 2004 Feb 12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Plant Pathology, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14963334" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Amino Acid Sequence ; Arabidopsis/genetics ; Chromosomes, Artificial, Bacterial ; Cloning, Molecular ; Fabaceae/genetics/metabolism/microbiology ; Gene Expression Regulation, Plant ; *Genes, Plant ; Lipopolysaccharides/metabolism ; Medicago/*genetics/metabolism/*microbiology ; Molecular Sequence Data ; Mycorrhizae/*physiology ; Nitrogen Fixation ; Phylogeny ; Plant Proteins/chemistry/genetics/*physiology ; Plant Roots/metabolism ; Protein Structure, Tertiary ; Recombination, Genetic ; Rhizobiaceae/*physiology ; Sequence Homology, Amino Acid ; Signal Transduction ; *Symbiosis ; Transgenes
    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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  • 6
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    Women in biomedicine: encouragement (1994)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1994-03-11
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Long, S R -- Zakian, V -- New York, N.Y. -- Science. 1994 Mar 11;263(5152):1357-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8128213" target="_blank"〉PubMed〈/a〉
    Keywords: Female ; Humans ; *Research ; *Women, Working
    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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  • 7
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    Symbiosis: Receptive to infection (2015)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2015-07-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Long, Sharon R -- England -- Nature. 2015 Jul 16;523(7560):298-9. doi: 10.1038/nature14632. Epub 2015 Jul 8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Stanford University, Stanford, California 94305-5020, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26153862" target="_blank"〉PubMed〈/a〉
    Keywords: Lipopolysaccharides/*metabolism ; Lotus/*metabolism/*microbiology ; Plant Proteins/*metabolism ; Receptors, Cell Surface/*metabolism ; Rhizobium/*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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  • 8
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    A plant flavone, luteolin, induces expression of Rhizobium meliloti nodulation genes (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-08-29
    Description: The symbiotic interaction of Rhizobium meliloti and alfalfa results in the formation of nitrogen-fixing root nodules. Rhizobium meliloti nodABC genes are required for the early host responses of cortical cell divisions and root hair curling. The induction of nodABC expression by alfalfa exudates demonstrates host-symbiont signaling at an early stage in nodule development. The inducer molecule for nodABC expression was isolated from plant exudate by constructing a nodABC-lacZ fusion to monitor the inducing activity. From ultraviolet-visible absorption spectra, proton nuclear magnetic resonance, and mass spectrometry, the inducer was determined to be 3',4', 5,7-tetrahydroxyflavone (luteolin). Luteolin is a normal secondary plant metabolite found throughout the plant kingdom that may serve to control nodABC expression during nodule development. This regulatory role for a flavone contrasts with the function of some flavonoids as defense compounds.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Peters, N K -- Frost, J W -- Long, S R -- R01-GM30962/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1986 Aug 29;233(4767):977-80.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3738520" target="_blank"〉PubMed〈/a〉
    Keywords: Flavonoids/*pharmacology ; Gene Expression Regulation/drug effects ; Luteolin ; Medicago sativa/physiology ; Nitrogen Fixation/*drug effects ; Rhizobium/*drug effects/genetics ; Symbiosis/drug effects
    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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  • 9
    Electronic Resource
    Electronic Resource
    Rhizobium Genetics (1989)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Genetics 23 (1989), S. 483-506 
    Details
    ISSN: 0066-4197
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.ge.23.120189.002411
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  • 10
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    A dual-genome Symbiosis Chip for coordinate study of signal exchange and development in a prokaryote-host interaction (2004)
    National Academy of Sciences
    Details
    Publication Date: 2004-11-12
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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