Presence of cu-type (Nirk) and cd1-type (nirs) nitrite reductase genes in the denitrifying bacterium bradyrhizobium nitroreducens sp. nov.

Jeonghwan Jang, Naoaki Ashida, Ayaaki Kai, Kazuo Isobe, Tomoyasu Nishizawa, Shigeto Otsuka, Akira Yokota, Keishi Senoo, Satoshi Ishii

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Nitrite reductase is a key enzyme for denitrification. There are two types of nitrite reductases: copper-containing NirK and cytochrome cd1-containing NirS. Most denitrifiers possess either nirK or nirS, although a few strains been reported to possess both genes. We herein report the presence of nirK and nirS in the soil-denitrifying bacterium Bradyrhizobium sp. strain TSA1T. Both nirK and nirS were identified and actively transcribed under denitrification conditions. Based on physiological, chemotaxonomic, and genomic properties, strain TSA1T (=JCM 18858T=KCTC 62391T) represents a novel species within the genus Bradyrhizobium, for which we propose the name Bradyrhizobium nitroreducens sp. nov.

Original languageEnglish (US)
Pages (from-to)326-331
Number of pages6
JournalMicrobes and environments
Volume33
Issue number3
DOIs
StatePublished - 2018

Bibliographical note

Publisher Copyright:
© 2018, Japanese Society of Microbial Ecology. All rights reserved.

Keywords

  • Bradyrhizobium
  • Denitrification
  • Genome
  • New species

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