Dataset Information

Exoproteomes of marine cyanobacteria grown under different regimes to detect their pili production; analysed by LC-MS/MS

ABSTRACT: Exoproteomes generated from Synechococcus sp. WH7803 and Prochlorococcus sp. MIT9313 cultures grown under different nutrient, light and temperature conditions. The aim was to see how the production of the pili were affected. Exoproteomes of marine Synechococcus under different nutrient regimes analysed by LC-MS/MS

INSTRUMENT(S): Orbitrap Fusion

ORGANISM(S): Synechococcus Sp.

TISSUE(S): Cell Culture

SUBMITTER: Joseph Christie-Oleza

LAB HEAD: Joseph A. Christie-Oleza

PROVIDER: PXD018396 | Pride | 2021-02-24

REPOSITORIES: Pride

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			Action	DRS
	OT_180320_17_MS18-061_Exo7803_8-1.raw	Raw
	OT_180320_17_MS18-061_Exo7803_8-2.raw	Raw
	OT_180320_17_MS18-061_Exo7803_8-3.raw	Raw
	OT_180320_17_MS18-061_Exo7803_80-1.raw	Raw
	OT_180320_17_MS18-061_Exo7803_80-2.raw	Raw

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Project description:Proteins secreted by marine cyanobacterium Synechococcus under phosphorus stress is largely uncharacterized. This dataset characterizes the exoproteins for both an open ocean (WH8102) and coastal (WH5701) Synechococcus strain and were collected as part of the study "Dissolved organic phosphorus bond-class utilization by Synechococcus". Study Abstract: Dissolved organic phosphorus (DOP) contains compounds with phosphoester (P-O-C), phosphoanhydride (P-O-P), and phosphorus-carbon (P-C) bonds. Despite DOP’s importance as a nutritional source for marine microorganisms, the bioavailability of each bond-class to the widespread cyanobacterium Synechococcus remains largely unknown. This study evaluates bond-class specific DOP utilization by cultures of an open ocean and a coastal ocean Synechococcus strain. Both strains exhibited comparable growth rates when provided phosphate, short-chain and long-chain polyphosphate (P-O-P), adenosine 5’-triphosphate (P-O-C and P-O-P), and glucose-6-phosphate (P-O-C) as the phosphorus source. However, growth rates on phosphomonoester adenosine 5’-monophosphate (P-O-C) and phosphodiester bis(4-methylumbelliferyl) phosphate (C-O-P-O-C) varied between strains, and neither strain grew on selected phosphonates. Consistent with the growth measurements, both strains preferentially hydrolyzed 3-polyphosphate, followed by adenosine 5’-triphosphate, and then adenosine 5’-monophosphate. The strains’ exoproteome contained phosphorus hydrolases, which combined with enhanced cell-free hydrolysis of 3-polyphosphate and adenosine 5’-triphosphate under phosphate deficiency, suggests active mineralization of short-chain polyphosphate by Synechococcus’ exoproteins. Synechococcus alkaline phosphatases presented broad substrate specificities, including activity towards short-chain polyphosphate, with varying affinities between the two strains. Collectively, these findings underscore the potentially significant role of compounds with phosphoanhydride bonds in Synechococcus phosphorus nutrition, thereby expanding our understanding of microbially-mediated DOP cycling in marine ecosystems.

Dataset Information

Exoproteomes of marine cyanobacteria grown under different regimes to detect their pili production; analysed by LC-MS/MS

Dataset's files

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