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Phaeocystis antarctica strain:CCMP1374

ABSTRACT: Phaeocystis antarctica genome sequencing project

PROVIDER: PRJNA34537 | ENA |

REPOSITORIES: ENA

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Response of Phaeocystis antarctica under changing iron conditions

Project description:The study aims at deciphering the response of Phaeocystis antarctica under iron limitation and iron supplementation at a transcriptomic level.

2018-12-15 | GSE102608 | GEO

Phaeocystis antarctica CCMP 1871 and CCMP 1374, Ross Sea Phaeocystis bloom, LC-MSMS

Project description:Phaeocystis antarctica strain 1374, Phaeocystis antarctica strain 1871, grown in iron concentrations of 0nM, 1nM, 3nM, 10nM, 30nM, and 100nM. Ross Sea Phaeocystis bloom sample.

2019-05-30 | PXD005341 | Pride

Phaeocystis antarctica

Project description:Phaeocystis antarctica Genome sequencing

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Project description:Phaeocystis antarctica transcriptomes under iron limitation

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Project description:Phaeocystis antarctica Transcriptome or Gene expression

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Flexible B12 ecophysiology of Phaeocystis antarctica due to a B12-independent methionine synthase fusion protein with widespread homologues

Project description:Coastal Antarctic marine ecosystems play an important role in carbon cycling due to their highly productive seasonal phytoplankton blooms. Southern Ocean microbes are primarily limited by light and iron (Fe) and can be co-limited by cobalamin (vitamin B12 ). Micronutrient limitation is a key driver of ecosystem dynamics and influences the composition of blooms, which are often dominated by either diatoms or the haptophyte Phaeocystis antarctica, each with varied impacts on carbon cycling. However, the vitamin requirements and ecophysiology of the keystone species P. antarctica remains poorly characterized. Using cultures, physiological analysis, and comparative ’omics we examined the response of P. antarctica to a matrix of Fe-B12 conditions. We show that P. antarctica is not auxotrophic for B12 , as previously suggested, and report new mechanistic insights of its B12 response in cultures of predominantly solitary and colonial cells. Proteomics coupled with proteogenomics detected a B12 -independent methionine synthase fusion protein (MetE-fusion) that is expressed under vitamin limitation and is interreplaced with the B12 -dependent isoform (MetH) in replete conditions. Database searches returned homologs of the MetE-fusion protein in multiple Phaeocystis species and in a wide range of marine microbes, including other photosynthetic eukaryotes with polymorphic life cycles and also bacterioplankton. Furthermore, MetE-fusion homologs were found to be expressed in metaproteomic and metatranscriptomic field samples in polar and more geographically widespread regions. As climate change impacts micronutrient availability in the coastal Southern Ocean, our finding that P. antarctica has a flexible B12 metabolism has implications for its relative fitness compared to B12 -auxotrophic diatoms.

2023-02-27 | PXD031524 | Pride

Study physiological and biochemical response of Phaeocystis antarctica to different irradiance and manganese/ iron deficiency

Project description:Iron and light are typically recognized as major limiting factors controlling phytoplankton growth in the Southern Ocean. Recent field-based evidence suggests, however, that manganese concentrations in this region can be low enough to impact phytoplankton physiology and primary productivity. Our study examined the interactive influence of combined iron and manganese deprivation on protein expression and photophysiology in Phaeocystis antarctica, a key Antarctic phytoplankter, and provide taxon-specific proteomic evidence that natural Southern Ocean Phaeocystis populations regularly experience stress due to combined low manganese and iron availability. In culture, combined low iron and manganese induced large scale changes in the Phaeocystis proteome and resulted in reorganization of key components of the photosynthetic apparatus; these differences were largely distinct from those arising from changes in irradiance. These results implicate manganese availability as an important driver of Southern Ocean productivity and demonstrate the utility of peptide mass spectrometry as a tool for mapping of manganese contributions to HNLC conditions in this region.

2019-06-25 | PXD010974 | Pride

Phaeocystis antarctica isolate:RS-24

Project description:Phaeocystis antarctica isolate:RS-24 Transcriptome or Gene expression

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Expression analysis of Pseudozyma antarctica T-34 and Ustilago maydis on different carbon source

Project description:Investigation of whole genome gene expression level in Pseudozyma antarctica T-34, compared to Ustilago maydis UM521. To clarify the transcriptomic characteristics of Pseudozyma antarctica under the conditions of high MEL production, a DNA microarray of both the strains, Pseudozyma antarctica T-34 and Ustilago maydis UM521 was prepared and analyzed the transcriptomes.

2014-03-21 | GSE47171 | GEO

Expression analysis of Pseudozyma antarctica T-34 and Ustilago maydis on different carbon source

2014-03-21 | E-GEOD-47171 | biostudies-arrayexpress

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