Smith M J, Banfield D K, Doteval K, Gorski S, Kowbel D J
Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, Canada.
J Mol Evol. 1990 Sep;31(3):195-204. doi: 10.1007/BF02109496.
We have cloned and sequenced over 9 kb of the mitochondrial genome from the sea star Pisaster ochraceus. Within a continuous 8.0-kb fragment are located the genes for NADH dehydrogenase subunits 1, 2, 3, and 4L (ND1, ND2, ND3, and ND4L), cytochrome oxidase subunits I, II, and III (COI, COII, and COIII), and adenosine triphosphatase subunits 6 and 8 (ATPase 6 and ATPase 8). This large fragment also contains a cluster of 13 tRNA genes between ND1 and COI as well as the genes for isoleucine tRNA between ND1 and ND2, arginine tRNA between COI and ND4L, lysine tRNA between COII and ATPase 8, and the serine (UCN) tRNA between COIII and ND3. The genes for the other five tRNAs lie outside this fragment. The gene for phenylalanine tRNA is located between cytochrome b and the 12S ribosomal genes. The genes for tRNA(glu) and tRNA(thr) are 3' to 12S ribosomal gene. The tRNAs for histidine and serine (AGN) are adjacent to each other and lie between ND4 and ND5. These data confirm the novel gene order in mitochondrial DNA (mtDNA) of sea stars and delineate additional distinctions between the sea star and other mtDNA molecules.
我们已经克隆并测序了来自赭色海星(Pisaster ochraceus)的超过9 kb的线粒体基因组。在一个连续的8.0 kb片段中,定位了烟酰胺腺嘌呤二核苷酸脱氢酶亚基1、2、3和4L(ND1、ND2、ND3和ND4L)、细胞色素氧化酶亚基I、II和III(COI、COII和COIII)以及腺苷三磷酸酶亚基6和8(ATPase 6和ATPase 8)的基因。这个大片段还包含在ND1和COI之间的13个tRNA基因簇,以及在ND1和ND2之间的异亮氨酸tRNA基因、在COI和ND4L之间的精氨酸tRNA基因、在COII和ATPase 8之间的赖氨酸tRNA基因,以及在COIII和ND3之间的丝氨酸(UCN)tRNA基因。其他五个tRNA基因位于该片段之外。苯丙氨酸tRNA基因位于细胞色素b和12S核糖体基因之间。tRNA(glu)和tRNA(thr)基因位于12S核糖体基因的3'端。组氨酸和丝氨酸(AGN)的tRNA彼此相邻,位于ND4和ND5之间。这些数据证实了海星线粒体DNA(mtDNA)中的新基因顺序,并描绘了海星与其他mtDNA分子之间的其他差异。