Transposon

Transposon
A short mobile DNA sequence that can replicate and of which copies can be inserted at random sites within chromosomes. A transposon has almost identical sequences at each end and inverted repeat sequences (that run in the opposite direction). It codes for the enzyme, transposase, that catalyses its insert in the chromosome.
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A segment of DNA ( e.g., an R-factor gene) which has a repeat of an insertion sequence element at each end that can migrate from one plasmid to another within the same bacterium, to a bacterial chromosome, or to a bacteriophage; the mechanism of transposition seems to be independent of the host's usual recombination mechanism. See jumping gene, transposable element. [L. transpono, pp. transpositum, to transfer, + -on]

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trans·po·son .tran(t)s-'pō-.zän n a transposable element esp. when it contains genetic material controlling functions other than those related to its relocation

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trans·po·son (tranz-poґzon) a transposable element that carries additional genes, such as for drug resistance, besides merely those for transposition, particularly a complex one occurring in prokaryotes. The term, however, is sometimes used interchangeably with transposable element.

Medical dictionary. 2011.

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  • Transposón — bacteriano Un transposón o elemento genético transponible es una secuencia de ADN que puede moverse de manera autosuficiente a diferentes partes del genoma de una célula, un fenómeno conocido como transposición. En este proceso, se pueden causar… …   Wikipedia Español

  • transposon — [ trɑ̃spozɔ̃ ] n. m. • 1984; de transposer ♦ Biol. Élément génétique transposable, composé d A.D.N. dont les terminaisons sont constituées de séquences identiques inversées, capable de réplication autonome et d insertion dans une nouvelle… …   Encyclopédie Universelle

  • transpóson — s. m. [Genética] Sequência de ADN ou gene que se pode mover em diferentes partes do genoma de uma célula. • [Brasil] Plural: transpósones ou transpósons.   ‣ Etimologia: inglês transposon   ♦ Grafia em Portugal: transposão …   Dicionário da Língua Portuguesa

  • transposón — Gen o grupo de genes móviles y que, al igual que los plásmidos, actúan transfiriendo instrucciones genéticas de un lugar a otro. Los transposones viajan en los bacteriófagos de virus a virus. Diccionario Mosby Medicina, Enfermería y Ciencias de… …   Diccionario médico

  • transposon — [trans pō′zän΄] n. [ TRANSPOS(ABLE) + on, as in OPERON] a segment of DNA that moves to a new location in a chromosome, or to another chromosome or cell, and alters the existing genetic instructions, sometimes producing significant changes …   English World dictionary

  • Transposon — Transposons are sequences of DNA that can move around to different positions within the genome of a single cell, a process called transposition. In the process, they can cause mutations and change the amount of DNA in the genome. Transposons were …   Wikipedia

  • Transposon — Ein Transposon (umgangssprachlich: springendes Gen) ist ein DNA Abschnitt bestimmter Länge im Genom, der seine Position im Genom verändern kann (Transposition). Man unterscheidet Transposons, deren mobile Zwischenstufe von RNA gebildet wird… …   Deutsch Wikipedia

  • Transposon — Élément transposable Un élément transposable, appelé parfois à tort transposon, est une séquence d ADN capable de se déplacer et de se multiplier de manière autonome dans un génome, par un mécanisme appelé transposition. Présents chez tous les… …   Wikipédia en Français

  • transposon — (tranz po zon) A DNA segment that carries the genes required for transposition and moves about the chromosome; if it contains genes other than those required for transposition, it may be called a composite transposon. Often the name is reserved… …   Dictionary of microbiology

  • transposon — (= transposable element) Small, mobile DNA sequences that can replicate and insert copies at random sites within chromosomes. They have nearly identical sequences at each end, oppositely oriented (inverted) repeats, and code for the enzyme,… …   Dictionary of molecular biology

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