Aarhus University Seal / Aarhus Universitets segl

Gemmatimonas groenlandica sp. nov. Is an Aerobic Anoxygenic Phototroph in the Phylum Gemmatimonadetes

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

  • Yonghui Zeng
  • ,
  • Yonghui Nupur, CAS - Institute of Microbiology
  • ,
  • Naicheng Wu, Ningbo University
  • ,
  • Anne Mette Madsen
  • Xihan Chen
  • ,
  • Alastair T. Gardiner, CAS - Institute of Microbiology
  • ,
  • Michal Koblížek, CAS - Institute of Microbiology

The bacterial phylum Gemmatimonadetes contains members capable of performing bacteriochlorophyll-based phototrophy (chlorophototrophy). However, only one strain of chlorophototrophic Gemmatimonadetes bacteria (CGB) has been isolated to date, hampering our further understanding of their photoheterotrophic lifestyle and the evolution of phototrophy in CGB. By combining a culturomics strategy with a rapid screening technique for chlorophototrophs, we report the isolation of a new member of CGB, Gemmatimonas (G.) groenlandica sp. nov., from the surface water of a stream in the Zackenberg Valley in High Arctic Greenland. Distinct from the microaerophilic G. phototrophica strain AP64T, G. groenlandica strain TET16T is a strictly aerobic anoxygenic phototroph, lacking many oxygen-independent enzymes while possessing an expanded arsenal for coping with oxidative stresses. Its pigment composition and infra-red absorption properties are also different from G. phototrophica, indicating that it possesses a different photosystem apparatus. The complete genome sequence of G. groenlandica reveals unique and conserved features in the photosynthesis gene clusters of CGB. We further analyzed metagenome-assembled genomes of CGB obtained from soil and glacier metagenomes from Northeast Greenland, revealing a wide distribution pattern of CGB beyond the stream water investigated.

Original languageEnglish
Article number606612
JournalFrontiers in Microbiology
Number of pages18
Publication statusPublished - Jan 2021

Bibliographical note

Publisher Copyright:
© Copyright © 2021 Zeng, Nupur, Wu, Madsen, Chen, Gardiner and Koblížek.

Copyright 2021 Elsevier B.V., All rights reserved.

    Research areas

  • bacterial isolation, Gemmatimonadetes, MALDI-TOF MS, oligotrophic environment, phototrophy

See relations at Aarhus University Citationformats

ID: 219305030