Genome Reduction in Psychromonas Species within the Gut of an Amphipod from the Ocean’s Deepest Point

Weipeng Zhang, Ren-Mao Tian, Jin Sun, Salim Bougouffa, Wei Ding, Lin Cai, Yi Lan, Haoya Tong, Yongxin Li, Alan J. Jamieson, Vladimir B. Bajic, Jeffrey C. Drazen, Douglas Bartlett, Pei-Yuan Qian

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


Amphipods are the dominant scavenging metazoan species in the Mariana Trench, the deepest known point in Earth's oceans. Here the gut microbiota of the amphipod Hirondellea gigas collected from the Challenger and Sirena Deeps of the Mariana Trench were investigated. The 11 amphipod individuals included for analyses were dominated by Psychromonas, of which a nearly complete genome was successfully recovered (designated CDP1). Compared with previously reported free-living Psychromonas strains, CDP1 has a highly reduced genome. Genome alignment showed deletion of the trimethylamine N-oxide (TMAO) reducing gene cluster in CDP1, suggesting that the
Original languageEnglish (US)
Issue number3
StatePublished - Apr 10 2018

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The investigations and samplings for this study were done with the permission of U.S. Fish and Wildlife Service (the Micronesia permit number is FM14-KY01401RS-01, and the USFW permit number is 2014-003). We thank the crew of the RV Falkor on the Schmidt Ocean Institute-funded cruises to Challenger Deep and Sirena Deep. We thank John B. Hanks and Craig Kapfer for their support while performing some of the computational work on Dragon and Snapdragon compute clusters of the Computational Bioscience Research Center at the King Abdullah University of Science and Technology. This study was supported by grants from the Strategic Priority Research Program of the Chinese Academy of Sciences (XDB06010102) and the Nature Science Foundation of China (U1301232).


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