Enrichment and physiological characterization of a novel comammox Nitrospira indicates ammonium inhibition of complete nitrification.

ABSTRACT: The recent discovery of bacteria within the genus Nitrospira capable of complete ammonia oxidation (comammox) demonstrated that the sequential oxidation of ammonia to nitrate via nitrite can also be performed within a single bacterial cell. Although comammox Nitrospira exhibit a wide distribution in natural and engineered ecosystems, information on their physiological properties is scarce due to the limited number of cultured representatives. Additionally, most available genomic information is derived from metagenomic sequencing and high-quality genomes of Nitrospira in general are limited. In this study, we obtained a high (90%) enrichment of a novel comammox species, tentatively named "Candidatus Nitrospira kreftii", and performed a detailed genomic and physiological characterization. Th

SUBMITTER: Sakoula D 

PROVIDER: S-EPMC8115096 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature