Drosophila nuclear lamin precursor Dm0 is translated from either of two developmentally regulated mRNA species apparently encoded by a single gene [published erratum appears in J Cell Biol 1988 Jun;106(6):2225]

Drosophila nuclear lamin precursor Dm0 is translated from either of two developmentally regulated mRNA species apparently encoded by a single gene [published erratum appears in J Cell Biol 1988 Jun;106(6):2225]
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果蝇核纤层蛋白前体 Dm0 是从显然由单个基因编码的两个发育调节 mRNA 物种中的任何一个翻译而来的[已发表的勘误表出现在 J Cell Biol 1988 Jun;106(6):2225]

DOI:
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发表时间:
1988
影响因子:
7.8
通讯作者:
Paul A. Fisher
Paul A. Fisher
中科院分区:
生物学1区
文献类型:
--
作者:
Yosef Gruenbaum;Yosef Landesman;B. Drees;John W. Bare;Harald Saumweber;M. Paddy;J. Sedat;David E. Smith;Bret M. Benton;Paul A. Fisher

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通过使用果蝇核纤层蛋白特异性单克隆抗体筛选 lambda-gt11 cDNA 表达文库,鉴定了编码果蝇核纤层蛋白 Dm1 和 Dm2 部分的 cDNA 克隆。使用初始 cDNA 作为探针,通过 Northern 印迹分析鉴定了两种不同的发育调节 mRNA 种类,并且已经分离出明显对应于每条信息的全长 cDNA 克隆。在 pT7 转录载体中对两个全长 cDNA 克隆进行体外转录,然后在麦芽裂解物中进行体外翻译,表明这两个克隆都编码核纤层蛋白 Dm0,即核纤层蛋白 Dm1 和 Dm2 的多肽前体。核苷酸序列分析证实了两个 cDNA 克隆编码相同多肽的印象,该多肽与人核纤层蛋白 A 和 C 以及哺乳动物中间丝蛋白高度同源。这两个克隆的不同之处在于 3'-非翻译区。核纤层蛋白 cDNA 克隆与果蝇多线染色体的原位杂交显示,在 2 号染色体左臂 25F 位置或附近仅存在一个杂交位点。基因组 DNA 的 Southern 印迹分析与基因组中存在编码果蝇核核纤层蛋白 Dm0 的单个或仅几个高度相似的基因的概念一致。
A cDNA clone encoding a portion of Drosophila nuclear lamins Dm1 and Dm2 has been identified by screening a lambda-gt11 cDNA expression library using Drosophila lamin-specific monoclonal antibodies. Two different developmentally regulated mRNA species were identified by Northern blot analysis using the initial cDNA as a probe, and full- length cDNA clones, apparently corresponding to each message, have been isolated. In vitro transcription of both full-length cDNA clones in a pT7 transcription vector followed by in vitro translation in wheat germ lysate suggests that both clones encode lamin Dm0, the polypeptide precursor of lamins Dm1 and Dm2. Nucleotide sequence analyses confirm the impression that both cDNA clones code for the identical polypeptide, which is highly homologous with human lamins A and C as well as with mammalian intermediate filament proteins. The two clones differ in their 3'-untranslated regions. In situ hybridization of lamin cDNA clones to Drosophila polytene chromosomes shows only a single locus of hybridization at or near position 25F on the left arm of chromosome 2. Southern blot analyses of genomic DNA are consistent with the notion that a single or only a few highly similar genes encoding Drosophila nuclear lamin Dm0 exist in the genome.
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发表时间: 1985-01-01
影响因子: 11.1
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