Metabolic Capacity of the Antarctic Cyanobacterium Phormidium pseudopriestleyi That Sustains Oxygenic Photosynthesis in the Presence of Hydrogen Sulfide
Sulfide inhibits oxygenic photosynthesis by blocking electron transfer between H 2 O and the oxygen-evolving complex in the D1 protein of Photosystem II. The ability of cyanobacteria to counter this effect has implications for understanding the productivity of benthic microbial mats in sulfidic envi...
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2021
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Online Access: | https://doi.org/10.3390/genes12030426 https://doaj.org/article/a8e865cae42c4e78a50ecb44e3e68a60 |
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ftdoajarticles:oai:doaj.org/article:a8e865cae42c4e78a50ecb44e3e68a60 2023-05-15T13:46:18+02:00 Metabolic Capacity of the Antarctic Cyanobacterium Phormidium pseudopriestleyi That Sustains Oxygenic Photosynthesis in the Presence of Hydrogen Sulfide Jessica E. Lumian Anne D. Jungblut Megan L. Dillion Ian Hawes Peter T. Doran Tyler J. Mackey Gregory J. Dick Christen L. Grettenberger Dawn Y. Sumner 2021-03-01T00:00:00Z https://doi.org/10.3390/genes12030426 https://doaj.org/article/a8e865cae42c4e78a50ecb44e3e68a60 EN eng MDPI AG https://www.mdpi.com/2073-4425/12/3/426 https://doaj.org/toc/2073-4425 doi:10.3390/genes12030426 2073-4425 https://doaj.org/article/a8e865cae42c4e78a50ecb44e3e68a60 Genes, Vol 12, Iss 426, p 426 (2021) cyanobacteria cryosphere genomics sulfide photosynthesis lake Genetics QH426-470 article 2021 ftdoajarticles https://doi.org/10.3390/genes12030426 2022-12-31T09:27:36Z Sulfide inhibits oxygenic photosynthesis by blocking electron transfer between H 2 O and the oxygen-evolving complex in the D1 protein of Photosystem II. The ability of cyanobacteria to counter this effect has implications for understanding the productivity of benthic microbial mats in sulfidic environments throughout Earth history. In Lake Fryxell, Antarctica, the benthic, filamentous cyanobacterium Phormidium pseudopriestleyi creates a 1–2 mm thick layer of 50 µmol L − 1 O 2 in otherwise sulfidic water, demonstrating that it sustains oxygenic photosynthesis in the presence of sulfide. A metagenome-assembled genome of P. pseudopriestleyi indicates a genetic capacity for oxygenic photosynthesis, including multiple copies of psbA (encoding the D1 protein of Photosystem II), and anoxygenic photosynthesis with a copy of sqr (encoding the sulfide quinone reductase protein that oxidizes sulfide). The genomic content of P. pseudopriestleyi is consistent with sulfide tolerance mechanisms including increasing psbA expression or directly oxidizing sulfide with sulfide quinone reductase. However, the ability of the organism to reduce Photosystem I via sulfide quinone reductase while Photosystem II is sulfide-inhibited, thereby performing anoxygenic photosynthesis in the presence of sulfide, has yet to be demonstrated. Article in Journal/Newspaper Antarc* Antarctic Antarctica Directory of Open Access Journals: DOAJ Articles Antarctic Fryxell ENVELOPE(163.183,163.183,-77.617,-77.617) Lake Fryxell ENVELOPE(163.183,163.183,-77.617,-77.617) The Antarctic Genes 12 3 426 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
cyanobacteria cryosphere genomics sulfide photosynthesis lake Genetics QH426-470 |
spellingShingle |
cyanobacteria cryosphere genomics sulfide photosynthesis lake Genetics QH426-470 Jessica E. Lumian Anne D. Jungblut Megan L. Dillion Ian Hawes Peter T. Doran Tyler J. Mackey Gregory J. Dick Christen L. Grettenberger Dawn Y. Sumner Metabolic Capacity of the Antarctic Cyanobacterium Phormidium pseudopriestleyi That Sustains Oxygenic Photosynthesis in the Presence of Hydrogen Sulfide |
topic_facet |
cyanobacteria cryosphere genomics sulfide photosynthesis lake Genetics QH426-470 |
description |
Sulfide inhibits oxygenic photosynthesis by blocking electron transfer between H 2 O and the oxygen-evolving complex in the D1 protein of Photosystem II. The ability of cyanobacteria to counter this effect has implications for understanding the productivity of benthic microbial mats in sulfidic environments throughout Earth history. In Lake Fryxell, Antarctica, the benthic, filamentous cyanobacterium Phormidium pseudopriestleyi creates a 1–2 mm thick layer of 50 µmol L − 1 O 2 in otherwise sulfidic water, demonstrating that it sustains oxygenic photosynthesis in the presence of sulfide. A metagenome-assembled genome of P. pseudopriestleyi indicates a genetic capacity for oxygenic photosynthesis, including multiple copies of psbA (encoding the D1 protein of Photosystem II), and anoxygenic photosynthesis with a copy of sqr (encoding the sulfide quinone reductase protein that oxidizes sulfide). The genomic content of P. pseudopriestleyi is consistent with sulfide tolerance mechanisms including increasing psbA expression or directly oxidizing sulfide with sulfide quinone reductase. However, the ability of the organism to reduce Photosystem I via sulfide quinone reductase while Photosystem II is sulfide-inhibited, thereby performing anoxygenic photosynthesis in the presence of sulfide, has yet to be demonstrated. |
format |
Article in Journal/Newspaper |
author |
Jessica E. Lumian Anne D. Jungblut Megan L. Dillion Ian Hawes Peter T. Doran Tyler J. Mackey Gregory J. Dick Christen L. Grettenberger Dawn Y. Sumner |
author_facet |
Jessica E. Lumian Anne D. Jungblut Megan L. Dillion Ian Hawes Peter T. Doran Tyler J. Mackey Gregory J. Dick Christen L. Grettenberger Dawn Y. Sumner |
author_sort |
Jessica E. Lumian |
title |
Metabolic Capacity of the Antarctic Cyanobacterium Phormidium pseudopriestleyi That Sustains Oxygenic Photosynthesis in the Presence of Hydrogen Sulfide |
title_short |
Metabolic Capacity of the Antarctic Cyanobacterium Phormidium pseudopriestleyi That Sustains Oxygenic Photosynthesis in the Presence of Hydrogen Sulfide |
title_full |
Metabolic Capacity of the Antarctic Cyanobacterium Phormidium pseudopriestleyi That Sustains Oxygenic Photosynthesis in the Presence of Hydrogen Sulfide |
title_fullStr |
Metabolic Capacity of the Antarctic Cyanobacterium Phormidium pseudopriestleyi That Sustains Oxygenic Photosynthesis in the Presence of Hydrogen Sulfide |
title_full_unstemmed |
Metabolic Capacity of the Antarctic Cyanobacterium Phormidium pseudopriestleyi That Sustains Oxygenic Photosynthesis in the Presence of Hydrogen Sulfide |
title_sort |
metabolic capacity of the antarctic cyanobacterium phormidium pseudopriestleyi that sustains oxygenic photosynthesis in the presence of hydrogen sulfide |
publisher |
MDPI AG |
publishDate |
2021 |
url |
https://doi.org/10.3390/genes12030426 https://doaj.org/article/a8e865cae42c4e78a50ecb44e3e68a60 |
long_lat |
ENVELOPE(163.183,163.183,-77.617,-77.617) ENVELOPE(163.183,163.183,-77.617,-77.617) |
geographic |
Antarctic Fryxell Lake Fryxell The Antarctic |
geographic_facet |
Antarctic Fryxell Lake Fryxell The Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
Genes, Vol 12, Iss 426, p 426 (2021) |
op_relation |
https://www.mdpi.com/2073-4425/12/3/426 https://doaj.org/toc/2073-4425 doi:10.3390/genes12030426 2073-4425 https://doaj.org/article/a8e865cae42c4e78a50ecb44e3e68a60 |
op_doi |
https://doi.org/10.3390/genes12030426 |
container_title |
Genes |
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12 |
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3 |
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426 |
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1766239832460230656 |