Comparative genome analysis of marine purple sulfur bacterium Marichromatium gracile YL28 reveals the diverse nitrogen cycle mechanisms and habitat-specific traits.

ABSTRACT: Mangrove ecosystems are characteristic of the high salinity, limited nutrients and S-richness. Marichromatium gracile YL28 (YL28) isolated from mangrove tolerates the high concentrations of nitrite and sulfur compounds and efficiently eliminates them. However, the molecular mechanisms of nitrite and sulfur compounds utilization and the habitat adaptation remain unclear in YL28. We sequenced YL28 genome and further performed the comparative genome analysis in 36 purple bacteria including purple sulfur bacteria (PSB) and purple non-sulfur bacteria (PNSB). YL28 has 6 nitrogen cycle pathways (up to 40 genes), and possibly removes nitrite by denitrification, complete assimilation nitrate reduction and fermentative nitrate reduction (DNRA). Comparative genome analysis showed that more nitrogen u

SUBMITTER: Zhu B 

PROVIDER: S-EPMC6292899 | biostudies-literature | 2018 Dec

REPOSITORIES: biostudies-literature