Candidatus Thioglobus autotrophicus strain:EF2 Genome sequencing. Candidatus Thioglobus autotrophicus strain:EF2

Sulfur oxidizing gammaproteobacteria from the SUP05 clade often dominate marine microbial communities in anoxic environments enriched in sulfide (reviewed in Morris & Spietz, 2022). These include free living members in marine oxygen minimum zones (OMZs), many of which are facultatively anaerobic and can respire oxygen or nitrogen oxides. Their largest impact on the marine N cycle, is thus under low dissolved oxygen or strictly anoxic conditions. Understanding the roles of these chemoautotrophs in N cycling in marine OMZs, where they can be either a sink or a source of nitrogen oxides, is critical to understanding global N cycling. The purpose of this study was to identify the genetic potential for chemoautotrophic nitrogen oxide respiration in additional SUP05 isolates from a marine OMZ.

来自SUP05进化枝（SUP05 clade）的硫氧化γ-变形菌（Gammaproteobacteria）通常在富硫化物的缺氧环境的海洋微生物群落中占据主导地位（综述参见Morris与Spietz，2022）。该类群包含海洋低氧区（oxygen minimum zones, OMZs）中的自由生活类群，其中多数为兼性厌氧菌，能够以氧气或氮氧化物作为呼吸底物。因此，它们对海洋氮循环的核心影响主要显现于低溶解氧或严格缺氧的环境条件下。明确这些化能自养微生物在海洋低氧区氮循环中的作用——它们既可作为氮氧化物的汇，也可作为其源——对于解析全球氮循环机制至关重要。本研究旨在从某一海洋低氧区的新增SUP05分离菌株中，鉴定化能自养型氮氧化物呼吸作用的遗传潜力。