Nickoloff J A, Hallick R B
Nucleic Acids Res. 1982 Dec 20;10(24):8191-210. doi: 10.1093/nar/10.24.8191.
The utility of chemically synthesized deoxyoligonucleotides as hybridization probes for the detection of tRNA genes has been examined. Chloroplast tRNA genes were chosen for this study. Deoxyoligonucleotides complementary to highly conserved regions of chloroplast tRNA genes of both higher plants and Euglena gracilis were chemically synthesized. These synthetic probes have been used to detect tRNA genes by Southern hybridizations to restriction fragments of chloroplast DNAs. This new method of tRNA gene mapping and the oligonucleotides synthesized may be of general application to many chloroplast genomes. This is illustrated by the detection of known and unknown tRNA genes of Euglena gracilis and spinach, and unknown tRNA genes of maize and cucumber chloroplast DNAs. The precise locus and polarity of the Euglena gracilis chloroplast tRNAPhe gene has been determined. We also describe experiments which relate to the effects of the time of hybridization, the stringency of washing, and of base pair mismatches on the hybridization signal.
已对化学合成的脱氧寡核苷酸作为检测tRNA基因的杂交探针的效用进行了研究。本研究选择了叶绿体tRNA基因。化学合成了与高等植物和纤细裸藻叶绿体tRNA基因高度保守区域互补的脱氧寡核苷酸。这些合成探针已用于通过与叶绿体DNA的限制性片段进行Southern杂交来检测tRNA基因。这种新的tRNA基因定位方法以及合成的寡核苷酸可能普遍适用于许多叶绿体基因组。纤细裸藻和菠菜已知和未知tRNA基因以及玉米和黄瓜叶绿体DNA未知tRNA基因的检测证明了这一点。已确定了纤细裸藻叶绿体tRNAPhe基因的精确位置和极性。我们还描述了与杂交时间、洗涤严谨性以及碱基对错配对杂交信号的影响相关的实验。