Genome-resolved metagenomic sequencing approaches have led to a substantial increase in the recognized diversity of microorganisms; this included the discovery of novel metabolic pathways in previously recognized clades, and has enabled a more accurate determination of the extant distribution of key metabolisms and how they evolved over Earth history. Here, we present metagenome-assembled genomes of members of the Chloroflexota (formerly Chloroflexi or Green Nonsulfur Bacteria) order Aggregatilineales (formerly SBR1031 or Thermofonsia) discovered from sequencing of thick and expansive microbial mats present in an intertidal lagoon on Little Ambergris Cay in the Turks and Caicos Islands. These taxa included multiple new lineages of Type 2 reaction center-containing phototrophs that were not closely related to previously described phototrophic Chloroflexota—revealing a rich and intricate history of horizontal gene transfer and the evolution of phototrophy and other core metabolic pathways within this widespread phylum.

中文翻译：

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特克斯和凯科斯群岛的微生物垫揭示了绿屈菌目的聚合体的多样性和光养进化

基因组解析的宏基因组测序方法已导致公认的微生物多样性大幅增加；这包括在先前认识的进化枝中发现新的代谢途径，并能够更准确地确定关键代谢的现有分布以及它们在地球历史上的演变方式。在这里，我们展示了 Chloroflexota（以前称为 Chloroflexi 或绿色非硫细菌）Aggregatilineales 目（以前称为 SBR1031 或 Thermofonsia）成员的宏基因组组装基因组，这些基因组是通过对土耳其小龙涎香岛潮间泻湖中存在的厚而广阔的微生物垫进行测序而发现的和凯科斯群岛。这些类群包括多个含有 2 型反应中心的光养生物的新谱系，这些谱系与之前描述的光养绿屈藻并不密切相关，揭示了这一广泛门内水平基因转移以及光养和其他核心代谢途径的进化的丰富而复杂的历史。