Miyuki Ogawara

Isolation of an archaeon at the prokaryote eukaryote interface

Hiroyuki Imachi, Masaru Konishi Nobu, Nozomi Nakahara, Yuki Morono et autres

This dataset contains the digitized treatments in Plazi based on the original journal article Imachi, Hiroyuki, Nobu, Masaru K., Nakahara, Nozomi, Morono, Yuki, Ogawara, Miyuki, Takaki, Yoshihiro, Takano, Yoshinori, Uematsu, Katsuyuki, Ikuta, Tetsuro, Ito, Motoo, Matsui, Yohei, Miyazaki, Masayuki, Murata, Kazuyoshi, Saito, …

Nitrogen and carbon flows in a microbial mat involving anaerobic oxidation of methane in northwestern Black Sea: perspectives from nitrogen and carbon isotopic composition of coenzyme F430 and its biosynthetic pathway

Masanori Kaneko, Yoshinori Takano, Yuta Isaji, Nanako O. Ogawa et autres

Abstract Coenzyme F430, a nickel-containing tetrapyrrole, serves as a cofactor for methyl-coenzyme M reductase (MCR), which catalyzes both the final step of methanogenesis and the initial step of anaerobic oxidation of methane (AOM). Due to its central role in these metabolic processes, …

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Methane- and hydrogen-dependent prokaryotic deep biosphere at the Suwa Basin, Japan: impacts of hydrogeological processes on subsurface prokaryotic ecology at the boundary between the North American and the Eurasian Plates

Hiroki Nishimura, Atsushi Urai, Yohei Matsui, Toshihiro Yoshimura et autres

Abstract The subsurface biosphere hosts diverse prokaryotes whose metabolic activities and roles in biogeochemical cycles remain unexplored. Specifically, interactions between subsurface prokaryotes and environmental characteristics are poorly constrained. The Suwa Basin, Japan, is a suitable setting for investigating the impacts of hydrogeological …

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First isolation of a methanotrophic Mycobacterium reveals ammonia- and pH-tolerant methane oxidation

Hiromi Kambara, Shuji Matsushita, Tomonori Kindaichi, Noriatsu Ozaki et autres

ABSTRACT Methanotrophs facilitate a key step in the global carbon cycle—oxidation of natural and anthropogenic methane—and comprehension of their physiology is critical in unraveling the ecology revolving around microbial methane sinks. Recent literature on aerobic methanotroph physiology focuses on two phyla ( …

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Eukaryotes’ closest relatives are internally simple syntrophic archaea

Hiroyuki Imachi, Masaru Konishi Nobu, Shun’ichi Ishii, Yuga Hirakata et autres

Abstract Eukaryotes are theorized to have originated from an archaeal phylum Promethearchaeota (formerly ‘Asgard’ archaea) 1,2 . The first cultured representatives revealed valuable insight 3,4 but are distantly related to the first eukaryotic common ancestor (FECA), leaving many unknowns regarding this archaeon’s …

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Promethearchaeum syntrophicum gen. nov., sp. nov., an anaerobic, obligately syntrophic archaeon, the first isolate of the lineage ‘Asgard’ archaea, and proposal of the new archaeal phylum Promethearchaeota phyl. nov. and kingdom Promethearchaeati regn. nov.

Hiroyuki Imachi, Masaru Konishi Nobu, Shingo Kato, Yoshihiro Takaki et autres

An anaerobic, mesophilic, syntrophic, archaeon strain MK-D1 T , was isolated as a pure co-culture with Methanogenium sp. strain MK-MG from deep-sea methane seep sediment. This organism is, to our knowledge, the first cultured representative of ‘Asgard’ archaea, an archaeal group closely …

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Multi-depth and Two Different Pore-size Exploration of Subsurface Biosphere Inhabiting the Methane-rich Deep Aquifers at Suwa Basin, Japan.

Hiroki Nishimura, Miyuki Ogawara, Yūsuke Yokoyama, Yoshinori Takano et autres

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Viruses, Vesicles, and other Biological Nanoparticles: The Sub-cellular Biosphere of a Deeply Buried 2km-Deep, 20-Million-Year-Old Coalbed Community

Donald Pan, Shun’ichi Ishii, Miho Hirai, Miyuki Ogawara et autres

Horizontal gene transfer is an important driver of adaptation and evolution in microorganisms. Transducing biological nanoparticles such as viral particles are believed to be key facilitators of horizontal gene transfer. In deep subseafloor sediments, energy can be highly limiting, supporting only extremely …

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Cultivation of previously uncultured microorganisms with a continuous-flow down-flow hanging sponge (DHS) bioreactor, using a syntrophic archaeon culture obtained from deep marine sediment as a case study

Hiroyuki Imachi, Masaru Konishi Nobu, Masayuki Miyazaki, Eiji Tasumi et autres

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Detection of planktonic coenzyme factor 430 in a freshwater lake: small-scale analysis for probing archaeal methanogenesis

Atsushi Urai, Makoto Matsushita, Ho‐Dong Park, Hiroyuki Imachi et autres

Abstract We present the first data describing molecular evidence of planktonic coenzyme factor 430 (hereafter referred to as F430), a key signature of methanogenic archaea, obtained from a water column sample in a freshwater lake in Japan. We report concentrations of native …

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Origin of Deep Methane Associated with a Unique Community of Microorganisms in an Organic- and Iodine-Rich Aquifer

Atsushi Urai, Yoshinori Takano, Hiroyuki Imachi, Shun’ichi Ishii et autres

Abstract We performed coenzyme factor 430 (F430) analysis and radiocarbon measurements to identify deep microorganisms, including methanogenic archaea, and assess the origin of methane in a deep organic- and iodine-rich aquifer in a forearc basin at the Southern Kanto gas field, Boso …

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Isolation of an archaeon at the prokaryote–eukaryote interface

Hiroyuki Imachi, Masaru Konishi Nobu, Nozomi Nakahara, Yuki Morono et autres

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