- 著者
- Fukushi Muneyuki Mino Sayaka Tanaka Hirohisa Nakagawa Satoshi Takai Ken Sawabe Tomoo
- 出版者
- Cell Press
- 雑誌
- iScience
- 巻号頁・発行日
- vol.23, no.9, pp.101462, 2020-09-25
- 被引用文献数
- 18
Nitrous oxide (N2O) is a potent greenhouse gas and has significantly increased in the atmosphere. Deep-sea hydrothermal fields are representative environments dominated by mesophilic to thermophilic members of the class Campylobacteria that possess clade II nosZ encoding nitrous oxide reductase. Here, we report a strain HRV44(T) representing the first thermophilic campylobacterium capable of growth by H-2 oxidation coupled to N2O reduction. On the basis of physiological and genomic properties, it is proposed that strain HRV44(T) (=JCM 34002 = DSM 111345) represents a novel species of the genus Nitratiruptor, Nitratiruptor labii sp. nov. The comparison of the N2O consumption ability of strain HRV44(T) with those of additional Nitratiruptor and other campylobacterial strains revealed the highest level in strain HRV44(T) and suggests the N2O-respiring metabolism might be the common physiological trait for the genus Nitratiruptor. Our findings provide insights into contributions of thermophilic Campylobacteria to the N2O sink in deep-sea hydrothermal environments.
- 著者
- Yamazaki Yohei Meirelles Pedro Milet Mino Sayaka Suda Wataru Oshima Kenshiro Hattori Masahira Thompson Fabiano L. Sakai Yuichi Sawabe Toko Sawabe Tomoo
- 出版者
- Nature Publishing Group
- 雑誌
- Scientific reports (ISSN:20452322)
- 巻号頁・発行日
- vol.6, 2016-02-25
- 被引用文献数
- 75
Gut microbiome shapes various aspects of a host's physiology, but these functions in aquatic animal hosts have yet to be fully investigated. The sea cucumber Apostichopus japonicus Selenka is one such example. The large growth gap in their body size has delayed the development of intensive aquaculture, nevertheless the species is in urgent need of conservation. To understand possible contributions of the gut microbiome to its host's growth, individual fecal microbiome comparisons were performed. High-throughput 16S rRNA sequencing revealed significantly different microbiota in larger and smaller individuals; Rhodobacterales in particular was the most significantly abundant bacterial group in the larger specimens. Further shotgun metagenome of representative samples revealed a significant abundance of microbiome retaining polyhydroxybutyrate (PHB) metabolism genes in the largest individual. The PHB metabolism reads were potentially derived from Rhodobacterales. These results imply a possible link between microbial PHB producers and potential growth promotion in Deuterostomia marine invertebrates.