Mitochondrial and plastid genomes of the colonial green alga Gonium pectorale give insights into the origins of organelle DNA architecture within the volvocales.
Mitochondrial and plastid genomes of the colonial green alga Gonium pectorale give insights into the origins of organelle DNA architecture within the volvocales.
复制标题
DOI：
10.1371/journal.pone.0057177
复制
发表时间：
2013
期刊：
影响因子：
3.7
通讯作者：
Nozaki H
中科院分区：
文献类型：
--
作者：
Hamaji T;Smith DR;Noguchi H;Toyoda A;Suzuki M;Kawai-Toyooka H;Fujiyama A;Nishii I;Marriage T;Olson BJ;Nozaki H
伏尔瓦尔绿藻是真核生物中线粒体和质体DNA(mtDNA和ptDNA)最多样化的物种之一。然而，来自这一组的几乎所有细胞器基因组数据都局限于单细胞物种，如莱茵衣藻，目前只有一个多细胞物种，∼，4,000细胞的Volvox carteri，已经对其细胞器DNA进行了测序。卡特氏弧菌细胞器基因组具有丰富的重复序列，而ptDNA是迄今测序过的最大的质体组。在这里，我们给出了由∼16细胞组成的群体草鱼的完整线粒体DNA和ptDNA，它在草鱼品系中所处的系统发育位置更接近于卡特氏弧菌而不是莱茵哈迪氏弧菌。胸甲线粒体DNA和ptDNA是环状的富含AT的分子，其长度和编码密度分别为16和222.6个碱基和73%和44%。它们与卡特氏弧菌的细胞器DNA有一些相同的特征，包括在叶绿体中有回文重复，但与莱恩哈迪亚弧菌有更多的相似之处，如mtDNA结构紧凑，细胞器DNA内含子含量相对较低。总体而言，胸盖藻细胞器基因组提出了几个有趣的问题，涉及到线形线粒体染色体的起源，以及多细胞和细胞器基因组扩张之间的关系。
Volvocalean green algae have among the most diverse mitochondrial and plastid DNAs (mtDNAs and ptDNAs) from the eukaryotic domain. However, nearly all of the organelle genome data from this group are restricted to unicellular species, like Chlamydomonas reinhardtii, and presently only one multicellular species, the ∼4,000-celled Volvox carteri, has had its organelle DNAs sequenced. The V. carteri organelle genomes are repeat rich, and the ptDNA is the largest plastome ever sequenced. Here, we present the complete mtDNA and ptDNA of the colonial volvocalean Gonium pectorale, which is comprised of ∼16 cells and occupies a phylogenetic position closer to that of V. carteri than C. reinhardtii within the volvocine line. The mtDNA and ptDNA of G. pectorale are circular-mapping AT-rich molecules with respective lengths and coding densities of 16 and 222.6 kilobases and 73 and 44%. They share some features with the organelle DNAs of V. carteri, including palindromic repeats within the plastid compartment, but show more similarities with those of C. reinhardtii, such as a compact mtDNA architecture and relatively low organelle DNA intron contents. Overall, the G. pectorale organelle genomes raise several interesting questions about the origin of linear mitochondrial chromosomes within the Volvocales and the relationship between multicellularity and organelle genome expansion.
登录
查看更多内容
DOI：
10.1073/pnas.0811205106
发表时间：
2009-03-03
影响因子：
11.1
作者：
Herron, Matthew D.;Hackett, Jeremiah D.;Michod, Richard E.
通讯作者：
Michod, Richard E.
影响因子：
5.6
作者：
MICHEL, F;WESTHOF, E
通讯作者：
WESTHOF, E
影响因子：
3.1
作者：
Belanger, Anne-Sophie;Brouard, Jean-Simon;Turmel, Monique
通讯作者：
Turmel, Monique
影响因子：
1.6
作者：
NOZAKI, H;KUROIWA, H;KUROIWA, T
通讯作者：
KUROIWA, T
影响因子：
16.8
作者：
Sachs, Joel L.
通讯作者：
Sachs, Joel L.