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 H2O 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 enviro...
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ftmdpi:oai:mdpi.com:/2073-4425/12/3/426/ 2023-08-20T04:01:01+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 agris 2021-03-16 application/pdf https://doi.org/10.3390/genes12030426 EN eng Multidisciplinary Digital Publishing Institute Microbial Genetics and Genomics https://dx.doi.org/10.3390/genes12030426 https://creativecommons.org/licenses/by/4.0/ Genes; Volume 12; Issue 3; Pages: 426 cyanobacteria cryosphere genomics sulfide photosynthesis lake Antarctica Text 2021 ftmdpi https://doi.org/10.3390/genes12030426 2023-08-01T01:17:45Z Sulfide inhibits oxygenic photosynthesis by blocking electron transfer between H2O 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 O2 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. Text Antarc* Antarctic Antarctica MDPI Open Access Publishing Antarctic The Antarctic Fryxell ENVELOPE(163.183,163.183,-77.617,-77.617) Lake Fryxell ENVELOPE(163.183,163.183,-77.617,-77.617) Genes 12 3 426 |
institution |
Open Polar |
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MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
cyanobacteria cryosphere genomics sulfide photosynthesis lake Antarctica |
spellingShingle |
cyanobacteria cryosphere genomics sulfide photosynthesis lake Antarctica 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 Antarctica |
description |
Sulfide inhibits oxygenic photosynthesis by blocking electron transfer between H2O 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 O2 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 |
Text |
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 |
Multidisciplinary Digital Publishing Institute |
publishDate |
2021 |
url |
https://doi.org/10.3390/genes12030426 |
op_coverage |
agris |
long_lat |
ENVELOPE(163.183,163.183,-77.617,-77.617) ENVELOPE(163.183,163.183,-77.617,-77.617) |
geographic |
Antarctic The Antarctic Fryxell Lake Fryxell |
geographic_facet |
Antarctic The Antarctic Fryxell Lake Fryxell |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
Genes; Volume 12; Issue 3; Pages: 426 |
op_relation |
Microbial Genetics and Genomics https://dx.doi.org/10.3390/genes12030426 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/genes12030426 |
container_title |
Genes |
container_volume |
12 |
container_issue |
3 |
container_start_page |
426 |
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1774722121991192576 |