Intracellular accumulation of polyphosphate by the yeast Candida humicola G-1 in response to acid pH

Article Abstract:

Results show that Candida humicola G-1 responds to acid stress by a 10-fold accumulation of polyphosphate preceded by a 4.5-fold increase in phosphate uptake from the culture medium. Data also show a 6-fold increase in the cellular polyphosphate kinase activity.

United States, Ireland, Testing, Yeast, Yeast (Food product), Protein kinases, Bioaccumulation, Hydrogen-ion concentration, Acidification

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Polyphosphate accumulation by Pseudomonas putida CA-3 and other medium-chain-length polyhydroxyalkanoate-accumulating bacteria under aerobic growth conditions

Article Abstract:

A study was conducted to investigate the accumulation of polyphosphate (polyP) and medium-chain-length polyhydroxyalkanoate (mclPHA) by the bacterium Pseudomonas putida CA-3 under aerobic growth conditions to determine whether increased polyP biosynthesis could lead to increased PHA production. The observation shows that polyP is not the rate-limiting step for mclPHA accumulation in Pseudomonas strains and it is possible to increase the strains by exposing the cells to other environmental signals or stresses.

Science & research, Growth, Phosphates, Pseudomonas putida, Biosynthesis, Properties, Company growth, Aerobic respiration

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Biodegradation of phosphonomycin by Rhizobium huakuii PMY1

Article Abstract:

A study was conducted to describe the biodegradation by Rhizobium huakuii PMY1 of up to 10mM phosphonomycin as a carbon, energy, and phosphorus source with accompanying P(sub i) release. To describe the metabolism of an organophosphonate as a source of carbon by any member of the Rhizobiaceae family is another objective. Results revealed that the biodegradation indicates a mechanism of resistance to this antibiotic and a new, phosphate-deregulated route for organophosphonate metabolism by Rhizobium spp.

Rhizobium, Biodegradation, Microbial biotechnology

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