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  • 1
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    Arabidopsis NPH1: a flavoprotein with the properties of a photoreceptor for phototropism (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-11-30
    Description: The NPH1 gene of Arabidopsis thaliana encodes a 120-kilodalton serine-threonine protein kinase hypothesized to function as a photoreceptor for phototropism. When expressed in insect cells, the NPH1 protein is phosphorylated in response to blue light irradiation. The biochemical and photochemical properties of the photosensitive protein reflect those of the native protein in microsomal membranes. Recombinant NPH1 noncovalently binds flavin mononucleotide, a likely chromophore for light-dependent autophosphorylation. The fluorescence excitation spectrum of the recombinant protein is similar to the action spectrum for phototropism, consistent with the conclusion that NPH1 is an autophosphorylating flavoprotein photoreceptor mediating phototropic responses in higher plants.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Christie, J M -- Reymond, P -- Powell, G K -- Bernasconi, P -- Raibekas, A A -- Liscum, E -- Briggs, W R -- New York, N.Y. -- Science. 1998 Nov 27;282(5394):1698-701.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Plant Biology, Carnegie Institution of Washington, 260 Panama Street, Stanford, CA 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9831559" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arabidopsis/genetics/*physiology ; *Arabidopsis Proteins ; Cell Line ; Cryptochromes ; *Drosophila Proteins ; *Eye Proteins ; Flavin Mononucleotide/metabolism ; Flavoproteins/physiology ; Genes, Plant ; Light ; Mutation ; Phosphoproteins/genetics/*metabolism ; Phosphorylation ; *Photoreceptor Cells, Invertebrate ; *Phototropism ; Protein-Serine-Threonine Kinases/genetics/*metabolism ; Receptors, G-Protein-Coupled ; Recombinant Proteins/metabolism ; Spectrometry, Fluorescence ; Spodoptera ; 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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  • 2
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    Methylation of histone H4 at arginine 3 facilitating transcriptional activation by nuclear hormone receptor (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-06-02
    Description: Acetylation of core histone tails plays a fundamental role in transcription regulation. In addition to acetylation, other posttranslational modifications, such as phosphorylation and methylation, occur in core histone tails. Here, we report the purification, molecular identification, and functional characterization of a histone H4-specific methyltransferase PRMT1, a protein arginine methyltransferase. PRMT1 specifically methylates arginine 3 (Arg 3) of H4 in vitro and in vivo. Methylation of Arg 3 by PRMT1 facilitates subsequent acetylation of H4 tails by p300. However, acetylation of H4 inhibits its methylation by PRMT1. Most important, a mutation in the S-adenosyl-l-methionine-binding site of PRMT1 substantially crippled its nuclear receptor coactivator activity. Our finding reveals Arg 3 of H4 as a novel methylation site by PRMT1 and indicates that Arg 3 methylation plays an important role in transcriptional regulation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wang, H -- Huang, Z Q -- Xia, L -- Feng, Q -- Erdjument-Bromage, H -- Strahl, B D -- Briggs, S D -- Allis, C D -- Wong, J -- Tempst, P -- Zhang, Y -- GM63067-01/GM/NIGMS NIH HHS/ -- P30 CA08748/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2001 Aug 3;293(5531):853-7. Epub 2001 May 31.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Biophysics, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7295, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11387442" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylation ; Amino Acid Sequence ; Animals ; Arginine/*metabolism ; Binding Sites ; Cell Nucleus/metabolism ; HeLa Cells ; Histones/chemistry/*metabolism ; Humans ; Hydroxamic Acids/pharmacology ; Intracellular Signaling Peptides and Proteins ; Lysine/metabolism ; Methylation ; Methyltransferases/chemistry/genetics/isolation & purification/*metabolism ; Molecular Sequence Data ; Mutation ; Oocytes ; Protein-Arginine N-Methyltransferases ; Receptors, Androgen/*metabolism ; Recombinant Proteins/metabolism ; S-Adenosylmethionine/metabolism ; *Transcriptional Activation ; Xenopus
    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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    Coral reef biodiversity and conservation (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-05-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Briggs, John C -- New York, N.Y. -- Science. 2002 May 10;296(5570):1026-8; author reply 1026-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12004904" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Evolution ; *Cnidaria ; *Conservation of Natural Resources ; *Ecosystem ; Pacific Ocean ; Seawater
    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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  • 4
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    Obituary: Harry Whittington (1916-2010) (2010)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2010-08-06
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Briggs, Derek E G -- England -- Nature. 2010 Aug 5;466(7307):706. doi: 10.1038/466706a.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Geology and Geophysics, and the Peabody Museum of Natural History, Yale University, New Haven, Connecticut 06520, USA. derek.briggs@yale.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20686564" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; British Columbia ; *Fossils ; Geologic Sediments/analysis/chemistry ; Great Britain ; History, 20th Century ; History, 21st Century ; Paleontology/*history ; United States
    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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    Machaeridians are Palaeozoic armoured annelids (2008)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2008-01-11
    Description: The systematic affinities of several Palaeozoic skeletal taxa were only resolved when their soft-tissue morphology was revealed by the discovery of exceptionally preserved specimens. The conodonts provide a classic example, their tooth-like elements having been assigned to various invertebrate and vertebrate groups for more than 125 years until the discovery of their soft tissues revealed them to be crown-group vertebrates. Machaeridians, which are virtually ubiquitous as shell plates in benthic marine shelly assemblages ranging from Early Ordovician (Late Tremadoc) to Carboniferous, have proved no less enigmatic. The Machaeridia comprise three distinct families of worm-like animals, united by the possession of a dorsal skeleton of calcite plates that is rarely found articulated. Since they were first described 150 years ago machaeridians have been allied with barnacles, echinoderms, molluscs or annelids. Here we describe a new machaeridian with preserved soft parts, including parapodia and chaetae, from the Upper Tremadoc of Morocco, demonstrating the annelid affinity of the group. This discovery shows that a lineage of annelids evolved a dorsal skeleton of calcareous plates early in their history; it also resolves the affinities of a group of problematic Palaeozoic invertebrates previously known only from isolated elements and occasional skeletal assemblages.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vinther, Jakob -- Van Roy, Peter -- Briggs, Derek E G -- England -- Nature. 2008 Jan 10;451(7175):185-8. doi: 10.1038/nature06474.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Geology and Geophysics, Yale University, PO Box 208109, New Haven, Connecticut 06520, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18185586" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Annelida/anatomy & histology/*classification/ultrastructure ; Fossils ; History, Ancient ; Morocco ; *Phylogeny
    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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  • 6
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    Palaeontology: Decay distorts ancestry (2010)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2010-02-12
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Briggs, Derek E G -- England -- Nature. 2010 Feb 11;463(7282):741-3. doi: 10.1038/463741a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20148023" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Artifacts ; Bias (Epidemiology) ; Chordata/*anatomy & histology/*classification ; *Fossils ; Humans ; Paleontology/*methods ; *Phylogeny ; Research Design
    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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  • 7
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    Anomalocaridid trunk limb homology revealed by a giant filter-feeder with paired flaps (2015)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2015-03-13
    Description: Exceptionally preserved fossils from the Palaeozoic era provide crucial insights into arthropod evolution, with recent discoveries bringing phylogeny and character homology into sharp focus. Integral to such studies are anomalocaridids, a clade of stem arthropods whose remarkable morphology illuminates early arthropod relationships and Cambrian ecology. Although recent work has focused on the anomalocaridid head, the nature of their trunk has been debated widely. Here we describe new anomalocaridid specimens from the Early Ordovician Fezouata Biota of Morocco, which not only show well-preserved head appendages providing key ecological data, but also elucidate the nature of anomalocaridid trunk flaps, resolving their homology with arthropod trunk limbs. The new material shows that each trunk segment bears a separate dorsal and ventral pair of flaps, with a series of setal blades attached at the base of the dorsal flaps. Comparisons with other stem lineage arthropods indicate that anomalocaridid ventral flaps are homologous with lobopodous walking limbs and the endopod of the euarthropod biramous limb, whereas the dorsal flaps and associated setal blades are homologous with the flaps of gilled lobopodians (for example, Kerygmachela kierkegaardi, Pambdelurion whittingtoni) and exites of the 'Cambrian biramous limb'. This evidence shows that anomalocaridids represent a stage before the fusion of exite and endopod into the 'Cambrian biramous limb', confirming their basal placement in the euarthropod stem, rather than in the arthropod crown or with cycloneuralian worms. Unlike other anomalocaridids, the Fezouata taxon combines head appendages convergently adapted for filter-feeding with an unprecedented body length exceeding 2 m, indicating a new direction in the feeding ecology of the clade. The evolution of giant filter-feeding anomalocaridids may reflect the establishment of highly developed planktic ecosystems during the Great Ordovician Biodiversification Event.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Van Roy, Peter -- Daley, Allison C -- Briggs, Derek E G -- England -- Nature. 2015 Jun 4;522(7554):77-80. doi: 10.1038/nature14256. Epub 2015 Mar 11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Department of Geology and Geophysics, Yale University, PO Box 208109, New Haven, Connecticut 06520, USA [2] Research Unit Palaeontology, Department of Geology and Soil Science, Ghent University, Krijgslaan 281/S8, B-9000 Ghent, Belgium. ; 1] Department of Zoology, University of Oxford, The Tinbergen Building, South Parks Road, Oxford OX1 3PS, UK [2] Oxford University Museum of Natural History, Parks Road, Oxford OX1 3PW, UK. ; 1] Department of Geology and Geophysics, Yale University, PO Box 208109, New Haven, Connecticut 06520, USA [2] Yale Peabody Museum of Natural History, Yale University, New Haven, Connecticut 06520, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25762145" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arthropods/*anatomy & histology/classification ; *Biological Evolution ; Extremities/*anatomy & histology ; *Fossils ; Gills/*anatomy & histology ; Head/anatomy & histology ; Morocco ; Phylogeny
    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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    Conodonts: a major extinct group added to the vertebrates (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-05-29
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Briggs, D E -- New York, N.Y. -- Science. 1992 May 29;256(5061):1285-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Geology, University of Bristol, United Kingdom.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1598571" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Fossils ; *Phylogeny ; Seawater ; Tooth ; Vertebrates/*classification
    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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    A great-appendage arthropod with a radial mouth from the Lower Devonian Hunsruck Slate, Germany (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-02-07
    Description: Great-appendage arthropods, characterized by a highly modified anterior limb, were previously unknown after the Middle Cambrian. One fossil from the Lower Devonian Hunsruck Slate, Germany, extends the stratigraphic range of these arthropods by approximately 100 million years. Schinderhannes bartelsi shows an unusual combination of anomalocaridid and euarthropod characters, including a highly specialized swimming appendage. A cladistic analysis indicates that the new taxon is basal to crown-group euarthropods and that the great-appendage arthropods are paraphyletic. This new fossil shows that features of the anomalocaridids, including the multisegmented raptorial appendage and circular plated mouth, persisted long after the initial radiation of the euarthropods.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kuhl, Gabriele -- Briggs, Derek E G -- Rust, Jes -- New York, N.Y. -- Science. 2009 Feb 6;323(5915):771-3. doi: 10.1126/science.1166586.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Palaeontology, Steinmann Institute, University of Bonn, Nussallee 8, 53115 Bonn, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19197061" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arthropods/*anatomy & histology/*classification ; Extremities/anatomy & histology ; *Fossils ; Germany ; Mouth/anatomy & histology ; Phylogeny
    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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  • 10
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    A draft sequence of the Neandertal genome (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-05-08
    Description: Neandertals, the closest evolutionary relatives of present-day humans, lived in large parts of Europe and western Asia before disappearing 30,000 years ago. We present a draft sequence of the Neandertal genome composed of more than 4 billion nucleotides from three individuals. Comparisons of the Neandertal genome to the genomes of five present-day humans from different parts of the world identify a number of genomic regions that may have been affected by positive selection in ancestral modern humans, including genes involved in metabolism and in cognitive and skeletal development. We show that Neandertals shared more genetic variants with present-day humans in Eurasia than with present-day humans in sub-Saharan Africa, suggesting that gene flow from Neandertals into the ancestors of non-Africans occurred before the divergence of Eurasian groups from each other.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Green, Richard E -- Krause, Johannes -- Briggs, Adrian W -- Maricic, Tomislav -- Stenzel, Udo -- Kircher, Martin -- Patterson, Nick -- Li, Heng -- Zhai, Weiwei -- Fritz, Markus Hsi-Yang -- Hansen, Nancy F -- Durand, Eric Y -- Malaspinas, Anna-Sapfo -- Jensen, Jeffrey D -- Marques-Bonet, Tomas -- Alkan, Can -- Prufer, Kay -- Meyer, Matthias -- Burbano, Hernan A -- Good, Jeffrey M -- Schultz, Rigo -- Aximu-Petri, Ayinuer -- Butthof, Anne -- Hober, Barbara -- Hoffner, Barbara -- Siegemund, Madlen -- Weihmann, Antje -- Nusbaum, Chad -- Lander, Eric S -- Russ, Carsten -- Novod, Nathaniel -- Affourtit, Jason -- Egholm, Michael -- Verna, Christine -- Rudan, Pavao -- Brajkovic, Dejana -- Kucan, Zeljko -- Gusic, Ivan -- Doronichev, Vladimir B -- Golovanova, Liubov V -- Lalueza-Fox, Carles -- de la Rasilla, Marco -- Fortea, Javier -- Rosas, Antonio -- Schmitz, Ralf W -- Johnson, Philip L F -- Eichler, Evan E -- Falush, Daniel -- Birney, Ewan -- Mullikin, James C -- Slatkin, Montgomery -- Nielsen, Rasmus -- Kelso, Janet -- Lachmann, Michael -- Reich, David -- Paabo, Svante -- GM40282/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- Intramural NIH HHS/ -- New York, N.Y. -- Science. 2010 May 7;328(5979):710-22. doi: 10.1126/science.1188021.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Evolutionary Genetics, Max-Planck Institute for Evolutionary Anthropology, D-04103 Leipzig, Germany. green@eva.mpg.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20448178" target="_blank"〉PubMed〈/a〉
    Keywords: African Continental Ancestry Group/genetics ; Animals ; Asian Continental Ancestry Group/genetics ; Base Sequence ; Bone and Bones ; DNA, Mitochondrial/genetics ; European Continental Ancestry Group/genetics ; Evolution, Molecular ; Extinction, Biological ; Female ; *Fossils ; Gene Dosage ; Gene Flow ; Genetic Variation ; *Genome ; *Genome, Human ; Haplotypes ; Hominidae/*genetics ; Humans ; Pan troglodytes/genetics ; Polymorphism, Single Nucleotide ; Selection, Genetic ; Sequence Alignment ; *Sequence Analysis, DNA ; Time
    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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