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在果蝇黑腹果蝇乙醇脱氢酶基因(adh)5'端插入一个copia元件,与发育和组织特异性表达模式的改变有关。

Insertion of a copia element 5' to the Drosophila melanogaster alcohol dehydrogenase gene (adh) is associated with altered developmental and tissue-specific patterns of expression.

作者信息

Strand D J, McDonald J F

机构信息

Department of Genetics, University of Georgia, Athens 30602.

出版信息

Genetics. 1989 Apr;121(4):787-94. doi: 10.1093/genetics/121.4.787.

Abstract

The Drosophila melanogaster alcohol dehydrogenase gene (adh) is under the control of two separate promoters (proximal and distal) which are preferentially utilized at the larval and adult life stages, respectively. A variant alcohol dehydrogenase allele (RI-42) isolated from a natural population contains a copia retroviral-like transposable element inserted 240 bp upstream from the distal (adult) adh transcriptional start site. Levels of adh transcripts in the RI-42 variant are reduced in tissues and at life stages where copia is actively expressed and are affected in trans- by mutant alleles at the suppressor-of-white-apricot (su(wa] and suppressor-of-forked (su(f] loci. These suppressor genes have no effect on adh expression in wild-type Drosophila.

摘要

黑腹果蝇乙醇脱氢酶基因(adh)受两个独立启动子(近端和远端)的调控,它们分别在幼虫和成虫生命阶段被优先利用。从自然种群中分离出的一个乙醇脱氢酶变异等位基因(RI - 42),在远端(成虫)adh转录起始位点上游240 bp处插入了一个类反转录病毒转座因子copia。在copia活跃表达的组织和生命阶段,RI - 42变异体中adh转录本的水平降低,并且受到白色杏色抑制基因(su(wa))和叉状抑制基因(su(f))位点的突变等位基因的反式影响。这些抑制基因对野生型果蝇中的adh表达没有影响。

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Copia-like transposable elements in the Drosophila genome.果蝇基因组中的类Copia转座元件。
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