Turmel Monique, Otis Christian, Lemieux Claude
Département de biochimie, de microbiologie et de bio-informatique, Institut de Biologie Intégrative et des Systèmes, Université Laval, Québec, Canada.
Mitochondrial DNA B Resour. 2020 Jan 14;5(1):548-550. doi: 10.1080/23802359.2019.1710283.
The 25,137-bp mitogenome of the green alga (Pedinomonadales, Pedinophyceae), which belongs to a basal class of the core Chlorophyta, is unusual in displaying a reduced gene content as well as other derived traits. Here, we present the mitogenome of sp. NIES 1824 (Marsupiomonadales, Pedinophyceae). Despite its smaller size, this 24,252-bp genome encodes twice as many genes (39) as its . homolog. Besides gradual gene erosion, our comparative analyses revealed that major changes in GC content and codon usage led to the gain of distinct, noncanonical genetic codes during evolution of the mitogenome in the Pedinophyceae.
绿藻(绿藻纲,衣藻目)的25,137碱基对线粒体基因组属于核心绿藻门的一个基部类群,其基因含量减少以及具有其他衍生特征,显得不同寻常。在此,我们展示了NIES 1824种(绿藻纲,袋鞭藻目)的线粒体基因组。尽管其大小较小,但这个24,252碱基对的基因组编码的基因数量(39个)是其同源基因组的两倍。除了基因逐渐减少外,我们的比较分析还表明,在绿藻纲线粒体基因组的进化过程中,GC含量和密码子使用的主要变化导致了独特的、非规范遗传密码的获得。