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  • 1
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    A tomato cysteine protease required for Cf-2-dependent disease resistance and suppression of autonecrosis (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-04-27
    Description: Little is known of how plant disease resistance (R) proteins recognize pathogens and activate plant defenses. Rcr3 is specifically required for the function of Cf-2, a Lycopersicon pimpinellifolium gene bred into cultivated tomato (Lycopersicon esculentum) for resistance to Cladosporium fulvum. Rcr3 encodes a secreted papain-like cysteine endoprotease. Genetic analysis shows Rcr3 is allelic to the L. pimpinellifolium Ne gene, which suppresses the Cf-2-dependent autonecrosis conditioned by its L. esculentum allele, ne (necrosis). Rcr3 alleles from these two species encode proteins that differ by only seven amino acids. Possible roles of Rcr3 in Cf-2-dependent defense and autonecrosis are discussed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kruger, Julia -- Thomas, Colwyn M -- Golstein, Catherine -- Dixon, Mark S -- Smoker, Matthew -- Tang, Saijun -- Mulder, Lonneke -- Jones, Jonathan D G -- New York, N.Y. -- Science. 2002 Apr 26;296(5568):744-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Sainsbury Laboratory, John Innes Centre, Norwich NR4 7UH, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11976458" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Amino Acid Sequence ; Base Sequence ; Cladosporium/*physiology ; Cloning, Molecular ; Cysteine Endopeptidases/chemistry/*genetics/*metabolism ; Cysteine Proteinase Inhibitors/pharmacology ; Gene Expression Regulation, Plant ; *Genes, Plant ; Immunity, Innate ; Leucine/analogs & derivatives/pharmacology ; Lycopersicon esculentum/*enzymology/genetics/*microbiology/physiology ; Molecular Sequence Data ; Mutation ; Phenotype ; *Plant Diseases ; Plant Leaves/enzymology ; Plant Proteins/*metabolism ; Plants, Genetically Modified ; Promoter Regions, Genetic ; Recombinant Fusion Proteins/chemistry/metabolism ; Tobacco/genetics ; 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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  • 2
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    Structure of a cofactor-deficient nitrogenase MoFe protein (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-04-16
    Description: One of the most complex biosynthetic processes in metallobiochemistry is the assembly of nitrogenase, the key enzyme in biological nitrogen fixation. We describe here the crystal structure of an iron-molybdenum cofactor-deficient form of the nitrogenase MoFe protein, into which the cofactor is inserted in the final step of MoFe protein assembly. The MoFe protein folds as a heterotetramer containing two copies each of the homologous alpha and beta subunits. In this structure, one of the three alpha subunit domains exhibits a substantially changed conformation, whereas the rest of the protein remains essentially unchanged. A predominantly positively charged funnel is revealed; this funnel is of sufficient size to accommodate insertion of the negatively charged cofactor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schmid, Benedikt -- Ribbe, Markus W -- Einsle, Oliver -- Yoshida, Mika -- Thomas, Leonard M -- Dean, Dennis R -- Rees, Douglas C -- Burgess, Barbara K -- New York, N.Y. -- Science. 2002 Apr 12;296(5566):352-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Chemistry and Chemical Engineering, Mail Code 147-75CH, Howard Hughes Medical Institute, California Institute of Technology, Pasadena, CA 91125, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11951047" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Azotobacter vinelandii/*enzymology ; Binding Sites ; Crystallization ; Crystallography, X-Ray ; Dimerization ; Hydrogen Bonding ; Models, Molecular ; Molecular Sequence Data ; Molybdoferredoxin/*chemistry/genetics/*metabolism ; Protein Conformation ; Protein Folding ; Protein Structure, Quaternary ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Static Electricity ; 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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    Recent origin of Plasmodium falciparum from a single progenitor (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-07-21
    Description: Genetic variability of Plasmodium falciparum underlies its transmission success and thwarts efforts to control disease caused by this parasite. Genetic variation in antigenic, drug resistance, and pathogenesis determinants is abundant, consistent with an ancient origin of P. falciparum, whereas DNA variation at silent (synonymous) sites in coding sequences appears virtually absent, consistent with a recent origin of the parasite. To resolve this paradox, we analyzed introns and demonstrated that these are deficient in single-nucleotide polymorphisms, as are synonymous sites in coding regions. These data establish the recent origin of P. falciparum and further provide an explanation for the abundant diversity observed in antigen and other selected genes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Volkman, S K -- Barry, A E -- Lyons, E J -- Nielsen, K M -- Thomas, S M -- Choi, M -- Thakore, S S -- Day, K P -- Wirth, D F -- Hartl, D L -- New York, N.Y. -- Science. 2001 Jul 20;293(5529):482-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Harvard-Oxford Malaria Genome Diversity Project, Department of Immunology and Infectious Diseases, Harvard School of Public Health, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11463913" target="_blank"〉PubMed〈/a〉
    Keywords: Africa ; Agriculture ; Alternative Splicing ; Animals ; Base Sequence ; *Biological Evolution ; Genes, Protozoan ; *Genetic Variation ; Humans ; *Introns ; Malaria, Falciparum/epidemiology/parasitology/transmission ; *Microsatellite Repeats ; Molecular Sequence Data ; Mutation ; Plasmodium/genetics ; Plasmodium falciparum/*genetics ; *Polymorphism, Single Nucleotide
    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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    Mutations in the sulfonylurea receptor gene in familial persistent hyperinsulinemic hypoglycemia of infancy (1995)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1995-04-21
    Description: Familial persistent hyperinsulinemic hypoglycemia of infancy (PHHI), an autosomal recessive disorder characterized by unregulated insulin secretion, is linked to chromosome 11p14-15.1. The newly cloned high-affinity sulfonylurea receptor (SUR) gene, a regulator of insulin secretion, was mapped to 11p15.1 by means of fluorescence in situ hybridization. Two separate SUR gene splice site mutations, which segregated with disease phenotype, were identified in affected individuals from nine different families. Both mutations resulted in aberrant processing of the RNA sequence and disruption of the putative second nucleotide binding domain of the SUR protein. Abnormal insulin secretion in PHHI appears to be caused by mutations in the SUR gene.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Thomas, P M -- Cote, G J -- Wohllk, N -- Haddad, B -- Mathew, P M -- Rabl, W -- Aguilar-Bryan, L -- Gagel, R F -- Bryan, J -- DK38146/DK/NIDDK NIH HHS/ -- DK44311/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1995 Apr 21;268(5209):426-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medical Specialties, University of Texas M.D. Anderson Cancer Center, Houston 77030, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7716548" target="_blank"〉PubMed〈/a〉
    Keywords: *ATP-Binding Cassette Transporters ; Amino Acid Sequence ; Base Sequence ; Chromosome Mapping ; Chromosomes, Human, Pair 11 ; DNA Mutational Analysis ; DNA, Complementary/genetics ; Genotype ; Humans ; Hyperinsulinism/*genetics ; Hypoglycemia/*genetics ; Infant ; Insulin/secretion ; Molecular Sequence Data ; Mutation ; Pancreatic Diseases/*genetics ; Phenotype ; Point Mutation ; Potassium Channels/chemistry/*genetics ; *Potassium Channels, Inwardly Rectifying ; RNA Splicing ; Receptors, Drug/chemistry/*genetics ; Sulfonylurea Compounds/metabolism ; Sulfonylurea Receptors
    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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    Isolation of the tomato Cf-9 gene for resistance to Cladosporium fulvum by transposon tagging (1994)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1994-11-04
    Description: The tomato Cf-9 gene confers resistance to infection by races of the fungus Cladosporium fulvum that carry the avirulence gene Avr9. The Cf-9 gene was isolated by transposon tagging with the maize transposable element Dissociation. The DNA sequence of Cf-9 encodes a putative membrane-anchored extracytoplasmic glycoprotein. The predicted protein shows homology to the receptor domain of several receptor-like protein kinases in Arabidopsis, to antifungal polygalacturonase-inhibiting proteins in plants, and to other members of the leucine-rich repeat family of proteins. This structure is consistent with that of a receptor that could bind Avr9 peptide and activate plant defense.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jones, D A -- Thomas, C M -- Hammond-Kosack, K E -- Balint-Kurti, P J -- Jones, J D -- New York, N.Y. -- Science. 1994 Nov 4;266(5186):789-93.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Cellular and Developmental Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7973631" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Cladosporium/genetics/*physiology ; Consensus Sequence ; DNA Primers ; *DNA Transposable Elements ; Fungal Proteins/genetics ; Gene Targeting ; *Genes, Plant ; Glycoproteins/chemistry/*genetics ; Glycosylation ; Lycopersicon esculentum/chemistry/*genetics/microbiology ; Membrane Glycoproteins/chemistry/*genetics ; Molecular Sequence Data ; Multigene Family ; Nucleic Acid Hybridization ; Plant Proteins/chemistry/*genetics ; Plants, Genetically Modified ; Polymerase Chain Reaction ; Sequence Alignment
    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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    Phospholipase D: a downstream effector of ARF in granulocytes (1994)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1994-01-28
    Description: Activation of the phospholipase D (PLD) pathway is a widespread response when cells are activated by agonists that bind receptors on the cell surface. A 16-kD cytosolic component can reconstitute guanosine triphosphate (GTP)-mediated activation of phospholipase D in HL60 cells depleted of their cytosol by permeabilization. This factor was purified and identified as two small GTP-binding proteins, ARF1 and ARF3. Recombinant ARF1 substituted for purified ARF proteins in the reconstitution assay. These results indicate that phospholipase D is a downstream effector of ARF1 and ARF3. The well-established role of ARF in vesicular traffic would suggest that alterations in lipid content by PLD are an important determinant in vesicular dynamics.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cockcroft, S -- Thomas, G M -- Fensome, A -- Geny, B -- Cunningham, E -- Gout, I -- Hiles, I -- Totty, N F -- Truong, O -- Hsuan, J J -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 1994 Jan 28;263(5146):523-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiology, University College London, United Kingdom.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8290961" target="_blank"〉PubMed〈/a〉
    Keywords: ADP-Ribosylation Factor 1 ; ADP-Ribosylation Factors ; Amino Acid Sequence ; Animals ; Cattle ; Cytosol/chemistry ; Enzyme Activation ; GTP-Binding Proteins/chemistry/isolation & purification/*metabolism ; *Glycerophospholipids ; Granulocytes/*metabolism ; Guanosine 5'-O-(3-Thiotriphosphate)/pharmacology ; Humans ; Molecular Sequence Data ; Phosphatidic Acids/metabolism ; Phosphatidylcholines/metabolism ; Phospholipase D/*metabolism ; Recombinant Proteins/metabolism ; Tumor Cells, Cultured
    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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