Institut de Biologie Moléculaire, Université Louis Pasteur, 15 Rue Descartes, 67084, Strasbourg, France.
Plant Mol Biol. 1985 Sep;4(5):315-20. doi: 10.1007/BF02418251.
Fractionation (by two-dimensional polyacrylamide gel electrophoresis) of total tRNA from wheat chloroplasts yields about 33 RNA spots. Of these, 30 have been identified by aminoacylation as containing tRNAs specific for 17 amino acids.Hybridization of labeled individual tRNAs to cloned chloroplast DNA fragments has revealed the location of at least nine pairs of tRNA genes in the segments of the inverted repeat, at least twelve tRNA genes in the large single copy region and one tRNA gene in the small single copy region.A comparison of this wheat chloroplast tRNA gene map to that of maize and of other higher plants suggests that gene rearrangements have occurred during evolution, even within cereal chloroplast DNA. These rearrangements have taken place within the inverted repeat, within the large single copy region and between the inverted repeat and the large single copy region.
从小麦叶绿体中总 tRNA 的分步(通过二维聚丙烯酰胺凝胶电泳)可得到约 33 个 RNA 斑点。其中,30 个已通过氨酰化鉴定为含有针对 17 种氨基酸的 tRNA。用标记的单个 tRNA 与克隆的叶绿体 DNA 片段杂交,揭示了至少 9 对 tRNA 基因在反向重复片段、至少 12 个 tRNA 基因在大单一拷贝区和 1 个 tRNA 基因在小单一拷贝区的位置。将该小麦叶绿体 tRNA 基因图谱与玉米和其他高等植物的图谱进行比较表明,基因重排发生在进化过程中,甚至在谷类叶绿体 DNA 中也是如此。这些重排在反向重复区、大单一拷贝区以及反向重复区和大单一拷贝区之间发生。