Origins, evolutionary history, and taxonomic distribution of alternative oxidase and plastoquinol terminal oxidase
Origins, evolutionary history, and taxonomic distribution of alternative oxidase and plastoquinol terminal oxidase
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DOI：
10.1016/j.cbd.2006.08.001
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发表时间：
2006-09-01
影响因子：
3
通讯作者：
Vanlerberghe, Greg C.
中科院分区：
文献类型：
--
作者：
McDonald, Allison E.;Vanlerberghe, Greg C.
交替氧化酶（AOX）和质体醌醇末端氧化酶（PTOX）分别是与呼吸和光合电子传递链相关的醌醇氧化酶。与以前的看法相反，AOX存在于许多动物门，以及异养和海洋光养变形菌。PTOX似乎仅限于能够进行产氧光合作用的生物体，包括蓝细菌、藻类和植物。我们建议，这两种氧化酶起源于原核生物从一个共同的祖先二铁羧酸盐蛋白，多样化的AOX内古老的变形菌和PTOX内古老的蓝藻。然后，每一种都分别进入真核细胞谱系; AOX通过产生线粒体的内共生事件，随后PTOX通过产生叶绿体的内共生事件。然后，这两种氧化酶通过垂直遗传以及二级和潜在的三级内共生事件通过真核域传播。(c)2006爱思唯尔公司All rights reserved.
Alternative oxidase (AOX) and plastoquinol terminal oxidase (PTOX) are related quinol oxidases associated with respiratory and photosynthetic electron transport chains, respectively. Contrary to previous belief, AOX is present in numerous animal phyla, as well as heterotrophic and marine phototrophic proteobacteria. PTOX appears limited to organisms capable of oxygenic photosynthesis, including cyanobacteria, algae and plants. We propose that both oxidases originated in prokaryotes from a common ancestral di-iron carboxylate protein that diversified to AOX within ancient proteobacteria and PTOX within ancient cyanobacteria. Each then entered the eukaryotic lineage separately; AOX by the endosymbiotic event that gave rise to mitochondria and later PTOX by the endosymbiotic event that gave rise to chloroplasts. Both oxidases then spread through the eukaryotic domain by vertical inheritance, as well as by secondary and potentially tertiary endosymbiotic events. (c) 2006 Elsevier Inc. All rights reserved.