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Encyclopedia results for Retrotransposon

  1. Retrotransposon

    genes. Furthermore, retrotransposon induced mutations are relatively stable, because the sequence ... step of forming DNA may be carried out by a reverse transcriptase which the retrotransposon encodes ... transcriptase of human retrotransposon L1 in Saccharomyces cerevisiae journal Mol. Cell. Biol. volume ... of retrotransposons within the host genome are possibly regulated both by retrotransposon and host encoded factors, to avoid deleterious effects on host and retrotransposon as well, in a relationship ..., Brindley PJ title The Sinbad retrotransposon from the genome of the human blood fluke, Schistosoma ... by the Entamoeba histolytica non long terminal repeat retrotransposon EhLINE1. journal The FEBS journal ... encoded by the Entamoeba histolytica non long terminal repeat retrotransposon EhLINE1. journal The FEBS .... See also Endogenous retrovirus Transposon Genomic organization Interspersed repeat Retrotransposon ... sequence Category Mobile genetic elements Category Molecular biology cs Retrotranspozon de Retrotransposon ...   more details



  1. Retrotransposon marker

    multiple issues context November 2008 cleanup June 2007 Retrotransposon markers are retrotransposon s that are used as Cladistics cladistic markers. The analysis of Retrotransposon Types of retrotransposons SINE s Short INterspersed Elements Retrotransposon Types of retrotransposons LINE s Long INterspersed Elements or truncated Retrotransposon Types of retrotransposons LTR s Long Terminal Repeats as molecular Cladistics cladistic markers represents a particularly interesting complement to DNA sequence and morphology biology morphological data. The reason for this is that retrotransposons are assumed to represent powerful noise poor synapomorphies Shedlock and Okada, 2000 . The Retrotransposon target sites are relatively unspecific so that the chance of an independent integration of exactly the same element into one specific site in different taxa is not large and may even be negligible over evolutionary time scales. Retrotransposon integrations are currently assumed to be irreversible events this might change since no eminent biological process biological mechanisms have yet been described for the precise re excision of class I transposon s, but see van de Lagemaat et al. 2005 . A clear differentiation between ancestral and derived character state at the respective locus genetics ... polarity make retrotransposon integration markers ideal tools for determining the common ancestry of taxa ... of a given retrotransposon in related taxa suggests their Orthology orthologues integration, a derived ... for phylogenetic studies based on retrotransposon presence absence data are the definition of whales ... IRAP s are an alternative valuable retrotransposon based markers. In this method, PCR oligonucleotide ... Flavell AJ, Knox MR, Pearce SR and Ellis THN. 1999 Retrotransposon based insertion polymorphisms ... GS Kalendar R, Grob T, Regina M, Suomeni A, Schulman A. 1999. IRAP and REMAP two new retrotransposon ... 10.1371 journal.pbio.0040091 DEFAULTSORT Retrotransposon Marker Category Phylogenetics ...   more details



  1. Ty5 retrotransposon

    Orphan date September 2008 The Saccharomyces cerevisiae retrotransposon Ty5 Ty5 is one of five ref cite journal author Kim JM, Vanguri S, Boeke JD, Gabriel A, Voytas DF title Transposable elements and genome organization a comprehensive survey of retrotransposons revealed by the complete Saccharomyces cerevisiae genome sequence journal Genome Res. volume 8 issue 5 pages 464 78 year 1998 month May pmid 9582191 doi 10.1101 gr.8.5.464 url http genome.cshlp.org content 8 5 464.full ref endogenous retrotransposon s native to the model organism Saccharomyces cerevisiae , all of which target integration to gene poor regions. Endogenous retrotransposons are hypothesized to target gene poor chromosomal targets in order to reduce the chance of inactivating host genes. ref cite journal author Lesage P, Todeschini AL title Happy together the life and times of Ty retrotransposons and their hosts journal Cytogenet. Genome Res. volume 110 issue 1 4 pages 70 90 year 2005 pmid 16093660 doi 10.1159 000084940 ref Ty1 Ty4 integrate upstream of Pol III promoters, while Ty5 targets integration to loci bound in heterochromatin . ref cite journal author Sandmeyer SB, Hansen LJ, Chalker DL title Integration specificity of retrotransposons and retroviruses journal Annu. Rev. Genet. volume 24 issue pages 491 518 year 1990 pmid 1965102 doi 10.1146 annurev.ge.24.120190.002423 ref In the case of Ty5, this likely ... name Gai98 cite journal author Gai X, Voytas DF title A single amino acid change in the yeast retrotransposon ... author Zou S, Wright DA, Voytas DF title The Saccharomyces Ty5 retrotransposon family is associated .... The Ty5 retrotransposon is used as a genetic model to study the architecture and dynamics of the telomeres ... retrotransposon Ty5 influences the organization of chromosome ends journal Nucleic Acids Res. volume ... targeting signals. Because retroviral integration integration is mediated by the retrotransposon .... The C terminus of the Ty retrotransposon s integrase contains an extension not seen in the retroviruses ...   more details



  1. Copia

    Copia may refer to Copia, the ancient city also called Thurii wikt copia Latin copia , a Latin word for abundance , especially used in rhetoric Copia Foundations of the Abundant Style , a rhetorical guidebook by Desiderius Erasmus COPIA , The American Center for Wine, Food and the Arts Copia album Copia album , by the artist Eluvium A LTR Retrotransposon Ty1 copia retrotransposons Retrotransposon found in many Animals and Plantscaca disambig la Copia discretiva ...   more details



  1. Ty2

    Ty2 may refer to PKP class Ty2 , a German made steam locomotive which was used by Polish State Railways Ty2 retrotransposon , a Saccharomyces cerevisiae transposon family. Ty the Tasmanian Tiger 2 Bush Rescue , a video game See also Ty21a disambig ...   more details



  1. Micropia

    Micropia is the name of a family of LTR retrotransposon s wide spread in the genomes of fruitflies of the genus Drosophila 1, 2 . Micropia retrotransposons in some species of Drosophila express a male germline specific and meiotic specific antisense transcript complementary to the reverse transcriptase RT and ribonuclease A RNaseA genes of the proviral retrotransposon. 3 No active transposition of micropia has been registered so far. micropia is likely part of a selfish driver system responsible for the Drosophila Y chromosomal lampbrushloop evolution in some species. 3 Micropia was discovered after micro cloning experiments carried out on Y chromosomal lampbrush loops by Prof. Wolfgang Hennig. Similar loops can be found in lampbrush chromosomes see Lampbrush chromosome that are characterisitc for the female germ cells of most animals, except mammals. The name micropia is an artificial word, i.e. a concoction of micro cloning and co pia like element . References 1. Huijser, P., C. Kirchhoff, D. H. Lankenau, and W. Hennig. 1988. Retrotransposon like sequences are expressed in Y chromosomal lampbrush loops of Drosophila hydei. J Mol Biol 203 689 97. 2. Lankenau, D. H., P. Huijser, E. Jansen, K. Miedema, and W. Hennig. 1988. Micropia a retrotransposon of Drosophila combining structural features of DNA viruses, retroviruses and non viral transposable elements. J Mol Biol 204 233 46. 3. Lankenau, S., V. G. Corces, and D. H. Lankenau. 1994. The Drosophila micropia retrotransposon encodes a testis specific antisense RNA complementary to reverse transcriptase. Mol Cell Biol 14 1764 1775. 4. Burt, A., and R. Trivers. 2006. Genes in Conflict. The Belknap Press of Harvard University Press, Cambridge, Ma London. Category Mobile genetic elements ...   more details



  1. Replicative transposition

    Unreferenced date December 2009 Orphan date December 2009 Replicative transposition is a mechanism of transposition in molecular biology in which the transposable element is duplicated during the reaction, so that the transposing entity is a copy of the original element. Replicative transposition is characteristic to retrotransposon s and occurs from time to time in class II transposons. DEFAULTSORT Replicative Transposition Category Mobile genetic elements ...   more details



  1. Metaviridae

    Taxobox virus group vi familia Metaviridae subdivision ranks Genera subdivision Metavirus br Errantivirus Metaviridae are a family of virus es which exist as retrotransposon s in a Eukaryote eukaryotic host s genome. They are very closely related to retrovirus es Metaviridae share many genomic elements with retroviruses, including length, organization, and genes themselves. This includes genes that encode reverse transcriptase , integrase , and capsid proteins. The reverse transcriptase and integrase proteins are needed for the retrotransposon activity of the virus. In some cases, virus like particles can be formed from capsid proteins. Some assembled Metaviridae particles can penetrate and infect previously uninfected cells. An example of this is the gypsy, a retroelement found in the Drosophila melanogaster genome. The ability to infect other cells in determined by the presence of the retroviral env genes which encode coat proteins. Metaviridae are split into the following genera Genus Metavirus type species Saccharomyces cerevisiae Ty3 virus Genus Errantivirus type species Drosophila melanogaster gypsy virus Genus Semotivirus , type species Ascaris lumbricoides Tas virus External links http www.ncbi.nlm.nih.gov ICTVdb Ictv fs metav.htm ICTVdB Index of Viruses http www.dpvweb.net notes showfamily.php?family Metaviridae Descriptions of Plant Viruses Retroviruses Category Viruses Virus stub ar ca Metav rid es Metaviridae zh ...   more details



  1. RetrOryza

    Orphan date January 2011 infobox biodatabase title RetrOryza logo File Database.png description Long terminal repeat retrotransposons . scope organism Rice center laboratory author pmid Chaparro & al. 2007 ref name pmid17071960 released 2006 standard format url http www.retroryza.org download webservice sql sparql webapp standalone license versioning frequency curation bookmark version RetrOryza is a database of Long terminal repeat retrotransposon s for the rice genome. ref name pmid17071960 cite journal quotes yes last Chaparro first Cristian authorlink coauthors Guyot Romain, Zuccolo Andrea, Pi gu Beno t, Panaud Olivier year 2007 month Jan title RetrOryza a database of the rice LTR retrotransposons journal Nucleic Acids Res. volume 35 issue Database issue pages D66 70 publisher location England issn pmid 17071960 doi 10.1093 nar gkl780 bibcode oclc id url pmc 1635335 language eng format accessdate laysummary laysource laydate quote ref References references See also Long terminal repeat retrotransposon Rice External links http www.retroryza.org Biodatabase stub Category Biological databases Category Molecular genetics Category Mobile genetic elements ...   more details



  1. R2 RNA element

    Orphan date May 2008 Rfam box acc RF00524 description R2 RNA element abbreviation R2 retro el avg length 134.00 avg identity 61.00 type Cis reg se PMID 15146081 ss Published PMID 15146081 release 10.0 The R2 RNA element is a non long terminal repeat non LTR retrotransposon retrotransposable element that inserts at a specific site in the 28S ribosomal RNA rRNA genes of most insect genomes ref name pmid7679954 cite journal author Luan DD, Korman MH, Jakubczak JL, Eickbush TH title Reverse transcription of R2Bm RNA is primed by a nick at the chromosomal target site a mechanism for non LTR retrotransposition journal Cell volume 72 issue 4 pages 595 605 year 1993 pmid 7679954 doi 10.1016 0092 8674 93 90078 5 issn ref In order to insert itself into the genome, retrotransposon encoded protein R2 protein makes a specific nick in one of the DNA strands at the insertion site and uses the 3 hydroxyl group exposed by this nick to prime the reverse transcription process termed target primed reverse transcription TPRT , where the RNA genome is transcribed into DNA. Conserved Secondary Structure in the R2 Element 3 UTR The R2 element 3 UTR RNA is a cis acting element identified in R2 retrotransposons which is involved in Primer molecular biology priming the reverse transcription process an essential part of retrotransposon insertion into the host genome . An RNA fragment found in the R2 three prime untranslated region 3 untranslated region 3 UTR , has been shown to interact with one copy of R2 protein during TPRT. This fragment has been shown to possess conserved secondary structure within Drosophila and silk moths, and also between the two groups. ref name pmid15146081 cite journal author Ruschak AM, Mathews DH, Bibillo A, et al. title Secondary structure models of the 3 untranslated regions of diverse R2 RNAs journal RNA volume 10 issue 6 pages 978 87 year 2004 pmid 15146081 doi 10.1261 rna.5216204 issn pmc 1370589 ref . References reflist External links Rfam id RF00524 name R2 ...   more details



  1. Composite transposon

    Unreferenced date March 2007 A composite transposon is similar in function to simple transposon s and Insertion sequence Insertion Sequence IS elements in that it has protein coding DNA segments flanked by inverted, repeated sequences that can be recognized by transposase enzymes. A composite transposon , however, is flanked by two separate IS elements which may or may not be exact replicas. Instead of each IS element moving separately, the entire length of DNA spanning from one IS element to the other is transposed as one complete unit. Composite transposons will also often carry one or more genes conferring antibiotic resistance. See also Tn10 Retrotransposon Composite SINE Transposons Composite SINE transposons in the Bovine genome Category Mobile genetic elements genetics stub ...   more details



  1. Chimeric gene

    gene in Drosophila . Science 260 91 95. ref This gene is formed from a Retrotransposon retrotransposed ...   more details



  1. Retroposon

    Retroposons are repetitive DNA fragments which are inserted into chromosome s after they had been reverse transcription reverse transcribed from any RNA molecule. In contrast to retrotransposon s, they never encode Reverse Transcriptase RT . Therefore, they are non autonomous elements with regard to transposition genetics transposition activity. compare Transposon s Non Long terminal repeat LTR retrotransposons such as the human L1 elements are sometimes falsely referred to as retroposons. Retroposition accounts for approximately 10,000 gene duplication events in the human genome, of which approximately 10 are functional. Such genes are called retrogene s and represent a certain type of retroposons. A classical event is the retroposition of a spliced pre mRNA molecule of the c src gene into the proviral ancestor of the Rous Sarcoma Virus RSV . The retroposed c src pre mRNA still contained a single intron and within RSV is now referred to as v src gene. References Emerson JJ, Kaessmann H, Betran E, Long M 2004 Extensive gene traffic on the mammalian X chromosome. Science 303 537 540 Category Mobile genetic elements genetics stub de Retroposon uk ...   more details



  1. Long terminal repeat

    Long terminal repeats LTRs are sequences of DNA that repeat hundreds or thousands of times. They are found in retrovirus retroviral DNA and in retrotransposon s, flanking functional genes. They are used by viruses to insert their genetic sequences into the host genome s. Example For example, a retrovirus genome might contain the following features LTR PBS PSI gag pol env LTR LTR U3RU5 LTR Long terminal repeats PBS Primer binding site PSI viral genome PSI Retroviral Psi packaging element packaging site group specific antigen gag , Reverse transcriptase pol , capsid env genes that code for proteins used in viral infection and reproduction Transcription The LTRs are partially Transcription genetics transcribed into an RNA intermediate, followed by reverse transcription into complementary DNA cDNA and ultimately dsDNA double stranded DNA with full LTRs. The LTRs then mediate integration of the retroviral DNA via an LTR specific integrase into another region of the host chromosome . Retroviruses such as Human Immunodeficiency Virus HIV use this basic mechanism. See also RetrOryza External links MeshName Long Terminal Repeat Repeated sequence Category Molecular genetics molecular cell biology stub de Long Terminal Repeat es Long terminal repeat fr S quence terminale longue r p t e pt Long Terminal Repeat ru ...   more details



  1. Gurken localisation signal

    Rfam box acc RF00626 description Gurken localisation signal abbreviation Gurken avg length 71.00 avg identity 85.00 type Cis reg se Bateman A, INFERNAL ss Published PMID 15992540 release 10.0 The Gurken localisation signal is an Cis regulatory element RNA regulatory element conserved across many species of the fruitfly Drosophila . The element consists of a RNA Structure RNA stem loop within the coding region that forms a signal for dynein mediated Gurken mRNA transport to a cap near the oocyte Cell nucleus nucleus . ref name pmid15992540 cite journal author Van De Bor V, Hartswood E, Jones C, Finnegan D, Davis I title gurken and the I factor retrotransposon RNAs share common localization signals and machinery journal Dev. Cell volume 9 issue 1 pages 51 62 year 2005 pmid 15992540 doi 10.1016 j.devcel.2005.04.012 ref References reflist 1 External links Rfam id RF00626 name Gurken localisation signal DEFAULTSORT Gurken Localisation Signal Category Cis regulatory RNA elements molecular cell biology stub ...   more details



  1. Line

    nuclear element LINE , a type of retrotransposon in genomics. Other A length of rope , cable ...   more details



  1. Line element

    about lines in mathematics Long Interspersed Nuclear Elements in DNA Retrotransposon LINEs merge invariant interval discuss Talk line element Merger proposal date December 2010 Unreferenced date August 2008 Expert subject Mathematics date November 2008 A line element ds alternatively, infinitesimal element of length in mathematics can most generally be thought of as the change in a position vector in an affine space expressing the change of the arc length . An easy way of visualizing this relationship is by parametrizing the given curve by Frenet s formulas . As such, a line element is then naturally a function of the metric, and can be related to the curvature tensor . The most well known line elements are those of cartesian planar and spatial coordinates. They are given by planar math ds 2 dx 2 dy 2 math spatial math ds 2 dx 2 dy 2 dz 2 math Other line elements are given by flat polar math ds 2 dr 2 r 2 d theta 2 math spherical polar math ds 2 dr 2 r 2 d theta 2 r 2 sin 2 theta d phi 2 math cylindrical polar math ds 2 dr 2 r 2 d theta 2 dz 2 math The most general 2 dimensional coordinates , metric is given by math ds 2 f chi , psi d chi 2 g chi , psi d chi d psi h chi , psi d psi 2 math Line elements in physics Line elements are used in physics, especially in theories of gravitation such as general relativity , where spacetime is modelled as a curved manifold with a metric. See also First fundamental form Metric tensor Category Affine geometry Category Riemannian geometry math stub relativity stub da Linjeelement de Linienelement fi Viivaelementti ...   more details



  1. SVA

    SVA may refer to Schools Sandia View Academy , in Corrales, New Mexico, USA School of Visual Arts , in Manhattan, New York City, USA Shenandoah Valley Academy , in New Market, Virginia, USA General SVA, the ICAO code for Saudi Arabian Airlines SVA, Specific Area Message Encoding SAME for Severe thunderstorm watch National Veterinary Institute Sweden Statens veterin rmedicinska anstalt Servicio de Vigilancia Aduanera Customs Surveillance Service , a Spanish law enforcement agency SequenceVariantAnalyzer , a computer program for annotating and analyzing genetic variants Single vehicle approval , performed by the Vehicle Certification Agency VCA to render a vehicle Street legal vehicle street legal ref http www.direct.gov.uk en Motoring BuyingAndSellingAVehicle ImportingAndExportingAVehicle DG 4022105 ref S INE V NTR A lu a composite, hominid specific retrotransposon ref http etd.lsu.edu docs available etd 11072006 091228 unrestricted Disser grace REVISEd 11 2 06.pdf ref SystemVerilog SystemVerilog assertions ref http defineview.com yahoo site admin assets docs SVA TRAINING AGENDA 1Day.354122005.pdf ref Agreement linguistics Subject verb agreement in grammar ref http www.sfsu.edu lac uselinks grammar.html ref Shareholder value added, a financial concept for the estimation of Shareholder value ref http books.google.com books?hl en&lr &id bc0PjplGR5gC&oi fnd&pg PR11&dq 22shareholder value added 22&ots R5TlYQGUD0&sig WKD1ldFi4pGFOqVzgfKcmWel9 g see p. 119 ref Stored Value Account ref http www.google.com q 22Stored Value Account 22 SVA google.com ref Military South Vietnamese Army, an erroneous name for the Army of the Republic of Vietnam ARVN ref http etd.lib.ttu.edu theses available etd 11252008 31295012202114 unrestricted 31295012202114.pdf see p. 15 ref Neuroscience Special visceral afferent References Reflist Disambig de SVA fr SVA it SVA ja SVA sv SVA ...   more details



  1. Polymerase stuttering

    Polymerase stuttering is the process by which a polymerase Transcription genetics transcribe s a nucleotide several times without progressing further on the mRNA chain. It is often used in addition of poly A tail s or 5 cap capping mRNA chains by less complex organism s such as viruses. Process A polymerase may undergo stuttering as a probability controlled event, hence it is not explicitly controlled by any mechanisms in the translation process. Generally, it is a result of many short repeated ribosomal frameshift frameshift s on a slippery sequence of nucleotide s on the mRNA strand ref Anderson EC, Hunt SL, Jackson RJ. Internal initiation of translation from the human rhinovirus 2 internal ribosome entry site requires the binding of Unr to two distinct sites on the 5 untranslated region. J Gen Virol. 2007 Nov 88 Pt 11 3043 52. ref . However, the frameshift is restricted to one in some cases two ref Mauro VP, Chappell SA, Dresios J. Analysis of polymerase shunting during translation initiation in eukaryotic mRNAs. Methods Enzymol. 2007 429 323 54. ref nucleotides with a pseudoknot or choke point s on both sides of the sequence. Examples A polymerase that exhibits this behavior is RNA dependent RNA polymerase , present in many RNA viruses . Reverse transcriptase has also been observed to undergo this polymerase stuttering ref Kurzynska Kokorniak A, Jamburuthugoda VK, Bibillo A, Eickbush TH. DNA directed DNA polymerase and strand displacement activity of the reverse transcriptase encoded by the R2 retrotransposon. J Mol Biol. 2007 Nov 23 374 2 322 33. Epub 2007 Sep 20. ref . Literature reflist Category Genetics ...   more details



  1. Concerted evolution

    expert subject Genetics date May 2009 Concerted evolution is a process that may explain the observation that individual members of a DNA family within one species are more closely related to each other than to members of the same type of DNA family in other species. Example An example can be seen in bacteria Escherichia coli has seven operon operons encoding various Ribosomal RNA . For each of these genes, Ribosomal DNA rDNA sequences are essentially identical among all of the seven operons sequence divergence of only 0.195 . In a closely related species, Haemophilus influenzae its six ribosomal RNA operons are entirely identical. When the 2 species are compared together however, the sequence divergence of the 16S rRNA gene between them is 5.90 ref name Liao99 http www.ncbi.nlm.nih.gov pmc articles PMC1377698 pdf 9915939.pdf , Liao, D. Concerted evolution molecular mechanism and biological implications. Am J Hum Genet 64, 24 30 1999 . ref . Requirements 1. Amplification of a gene, usually assisted by recombination events in IS elements in bacteria or in similar high copy number repetitive genetic elements Endogenous retrovirus ERV , Retrotransposon LINEs LINE , SINE , etc . This increases the copy number of the gene. In sexual reproducing organisms unequal crossing over during meiosis may be responsible for amplification due to misalignment of repeated sequences. 2. Redistribution of genes requires transposons transposition , probably assisted by the same repetitive genetic elements as in 1 . 3. Homogenization of alleles by gene conversion may play a role in sexual reproducing organisms. Some genes have a bias and are more prone to gene conversion than others, thus reinforcing the unity of the genes within a gene family of a species. References reflist Category Population genetics ...   more details



  1. PEG10

    Orphan date February 2009 PBB geneid 23089 Retrotransposon derived protein PEG10 is a protein that in humans is encoded by the PEG10 gene . ref name pmid11318613 cite journal author Ono R, Kobayashi S, Wagatsuma H, Aisaka K, Kohda T, Kaneko Ishino T, Ishino F title A retrotransposon derived gene, PEG10, is a novel imprinted gene located on human chromosome 7q21 journal Genomics volume 73 issue 2 pages 232 7 year 2001 month Apr pmid 11318613 pmc doi 10.1006 geno.2001.6494 ref ref name pmid15716091 cite journal author Brandt J, Schrauth S, Veith AM, Froschauer A, Haneke T, Schultheis C, Gessler M, Leimeister C, Volff JN title Transposable elements as a source of genetic innovation expression and evolution of a family of retrotransposon derived neogenes in mammals journal Gene volume 345 issue 1 pages 101 11 year 2005 month Apr pmid 15716091 pmc doi 10.1016 j.gene.2004.11.022 ref ref name pmid16093683 cite journal author Brandt J, Veith AM, Volff JN title A family of neofunctionalized Ty3 gypsy retrotransposon genes in mammalian genomes journal Cytogenet Genome Res volume 110 issue 1 4 pages 307 17 year 2005 month Aug pmid 16093683 pmc doi 10.1159 000084963 ref ref name entrez cite web title Entrez Gene PEG10 paternally expressed 10 url http www.ncbi.nlm.nih.gov sites entrez?Db gene&Cmd ShowDetailView&TermToSearch 23089 accessdate ref The PBB Summary template is automatically maintained by Protein Box Bot. See Template PBB Controls to Stop updates. PBB Summary section title summary text This gene includes two overlapping reading frames of the same transcript encoding distinct isoforms. The shorter isoform has a CCHC type zinc finger motif containing a sequence characteristic of gag proteins of most retroviruses and some retrotransposons, and it functions in part by interacting with members of the TGF beta receptor family. The longer isoform has the active site DSG consensus ... 6.3.197 cite journal author Volff J, K rting C, Schartl M title Ty3 Gypsy retrotransposon fossils in mammalian ...   more details



  1. Transposon

    is viewed as a particularly specialized form of eukaryotic retrotransposon, which is able to encode ... to a homologous recombination . The five distinct yeast Saccharomyces cerevisiae retrotransposon families Ty1 retrotransposon Ty1 , Ty2 retrotransposon Ty2 , Ty3 retrotransposon Ty3 , Ty4 retrotransposon Ty4 and Ty5 retrotransposon Ty5 ref cite journal author Kim JM, Vanguri S, Boeke JD, Gabriel ..., induction and defense One study estimated the rate of transposition of a particular retrotransposon ...   more details



  1. Euarchontoglires

    Taxobox name Euarchontoglires fossil range Fossil range Late Cretaceous recent image Ring tailed lemurs.jpg image width 160px image caption Ring tailed Lemur s Lemur catta regnum Animal ia classis Mammal ia subclassis Theriiformes infraclassis Eutheria unranked magnordo subcohort Exafroplacentalia Notolegia magnordo Boreoeutheria superordo Euarchontoglires subdivision ranks Order biology Order s subdivision Glires Anagaloidea Rodent ia Lagomorpha Euarchonta Dermoptera Scandentia Primates Euarchontoglires synonymous with Supraprimates is a clade of mammal s, the living members of which are rodent s, Lagomorpha lagomorph s, treeshrew s, colugo s and primate s including humans . Evolutionary relationships The Euarchontoglires clade is based on DNA sequence analyses and retrotransposon Retrotransposon Marker presence absence data , combining the Glires clade , which consists of Rodent ia and Lagomorpha , with that of Euarchonta , a clade consisting of Scandentia , Primates which includes humans and Dermoptera . Euarchontoglires is now recognized as one of four major groups within Eutheria containing placental mammals . ref Murphy, W. J., Eizirik, E., O Brien, S. J., Madsen, O., Scally, M., et al. Resolution of the early placental mammal radiation using Bayesian phylogenetics. Science 2001. 294 2348 2351. ref These four clades are usually discussed without a Linnaean rank, but has been assigned the rank of cohort or magnorder, and superorder. Relations within the four cohorts, Euarchontoglires, Xenarthra , Laurasiatheria , and Afrotheria , and the identity of the placental root, remain somewhat controversial. ref Asher RJ, Bennett N, Lehmann T. 2009. The new framework for understanding placental mammal evolution. Bioessays 31 8 853 864. ref Euarchontoglires probably split from the Laurasiatheria sister group about 85 to 95 million years ago during the Cretaceous , developing in the Laurasia n island group which would later become Europe . This hypothesis is supported by ...   more details



  1. Euarchonta

    Taxobox name Euarchontans fossil range Late Cretaceous Recent image Euarchonta.jpg image width 250px image caption small Euarchonts upper  left   Plesiadapis , upper  right   Northern Treeshrew , lower  left   Sunda Flying Lemur and lower  right   Yellow Baboon small regnum Animal ia phylum Chordate Chordata classis Mammal ia subclassis Theriiformes infraclassis Eutheria unranked magnordo subcohort Exafroplacentalia Notolegia magnordo Boreoeutheria superordo Euarchontoglires unranked familia Euarchonta subdivision ranks Order biology Orders subdivision   Scandentia br   Primatomorpha br   Dermoptera br   Primates The Euarchonta are a grandorder of mammal s containing four order biology orders the Dermoptera or colugos, the Scandentia or treeshrews, the extinct Plesiadapiformes , and the Primate s. The term Euarchonta meaning true ancestors first appeared in the general scientific literature in 1999, when molecular evidence suggested that the morphology biology morphology based Archonta be trimmed down to exclude bat Chiroptera . Major DNA sequence analyses of predominantly nuclear sequences Murphy et al., 2001 support the Euarchonta hypothesis, while a major study investigating mitochondrial sequences supports a different tree topology Arnason et al., 2002 . A study investigating retrotransposon Retrotransposon Marker presence absence data has claimed strong support for Euarchonta Kriegs et al., 2007 . Some interpretations of the molecular data link Primates and Dermoptera in a clade mirorder known as Primatomorpha , which is the sister of Scandentia . In some the Dermoptera are a member of the primates rather than a sister. Other interpretations link the Dermoptera and Scandentia together in a group called Sundatheria as the sister group of the primates. Together, the three are known as Euarchonta, the True Founders . Euarchonta and Glires together form the Euarchontoglires , one of the four Eutheria n clades. Clade l ...   more details



  1. Glires

    for the enemy in the video game Super Smash Bros. Brawl Super Smash Bros. Brawl Taxobox name Glires fossil range fossilrange 65 0 Early Paleocene Recent image kangaroo rat.jpg image width 250px image caption Kangaroo rat Dipodomys regnum Animal ia classis Mammal ia infraclassis Eutheria magnordo Boreoeutheria superordo Euarchontoglires unranked familia Glires subdivision ranks Order biology Order s subdivision Rodent ia Lagomorpha Glires Latin gl r s , dormice is a clade sometimes taxonomic rank ranked as grandorder consisting of rodents and Lagomorpha lagomorphs rabbit s, hare s, and pika s . This hypothesis that these form a monophyletic group has been long debated based on morphological evidence, although recent morphological studies strongly support monophyly of Glires Meng and Wyss, 2001 Meng et al., 2003 . In particular, the discovery of new fossil material of basal phylogenetics basal members of Glires, particularly the genus genera Mimotona , Gomphos , Heomys , Matutinia , Rhombomylus , and Sinomylus , has helped to bridge the gap between more typical rodents and lagomorphs Meng et al., 2003 Asher et al., 2005 . Data based on Cell nucleus nuclear DNA support Glires as a sister of Euarchonta to form Euarchontoglires Murphy et al. and Madsen et al. 2001 , but some genetic data from both nuclear and mitochondrial DNA have been less supportive Arnason et al. 2002 . A study investigating retrotransposon Retrotransposon Marker presence absence data unambiguously supports the Glires hypothesis Kriegs et al. 2007 . Clade label1 Euarchontoglires 1 Clade label1 Glires 1 Clade 1 Rodent ia rodents 2 Lagomorpha rabbits, hares, pikas label2 Euarchonta 2 Clade 1 Treeshrew Scandentia treeshrews label2 Primatomorpha 2 Clade 1 Colugo Dermoptera flying lemurs 2 Clade 1 Primate s Plesiadapiformes , Strepsirrhini , Haplorrhini Rujukan cite journal author Asher RJ, Meng J, Wible JR, et al. title Stem Lagomorpha and the antiquity of Glires journal Science volume 307 issue 5712 pag ...   more details




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