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反转子,一类结构和功能相关的遗传元件,包括线性DNA质粒、转座元件和腺病毒型病毒的基因组。

Invertrons, a class of structurally and functionally related genetic elements that includes linear DNA plasmids, transposable elements, and genomes of adeno-type viruses.

作者信息

Sakaguchi K

机构信息

Nihon Shokuhin Kako Laboratories, Tokyo, Japan.

出版信息

Microbiol Rev. 1990 Mar;54(1):66-74. doi: 10.1128/mr.54.1.66-74.1990.

Abstract

Invertrons are genetic elements composed of DNA with inverted terminal repeats at both ends, covalently bonded to terminal proteins involved in the initiation of DNA replication at both their 5' termini when they exist in the cytoplasm of their host in free form. They function as viruses, linear DNA plasmids, transposable elements, and sometimes combinations of two of these properties. They differ from retroviruses and related retro-type transposons which have direct repeats on both their genomic ends and exploit RNA intermediates for replication of their DNA. A model for replication and integration of invertrons is presented, as well as a model for transposition of transposable elements.

摘要

反转子是由两端带有反向末端重复序列的DNA组成的遗传元件,当它们以游离形式存在于宿主细胞质中时,在其5'末端与参与DNA复制起始的末端蛋白共价结合。它们具有病毒、线性DNA质粒、转座元件的功能,有时还具有其中两种特性的组合。它们不同于逆转录病毒和相关的逆转录型转座子,后者在其基因组两端都有正向重复序列,并利用RNA中间体进行DNA复制。本文提出了反转子的复制和整合模型,以及转座元件的转座模型。

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