Influence of osmotic and nutritional stress on physiology of Penicillium fellutanum in removal of phophocholine and modification of phospho-1-O-[N-peptidyl-(2-aminoethanol)] phosphodiesters of peptidophosphogalactomannan species

Article Abstract:

Results indicate that three amino acids in the 3-kDa peptides and phosphodiesters are precursors for the synthesis of choline-O-sulfate and glycine betaine in stressed Penicillium.

United States, Statistical Data Included, Analysis, Physiological aspects, Stress (Physiology), Beta lactamases

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Relationship of exo-beta-D-galactofuranosidase kinetic parameters to the number of phosphodiesters in Penicillium fellutanum peptidophosphogalactomannan: enzyme purification and kinetics of glycopeptide and galactofuran chain hydrolysis

Article Abstract:

The rate of hydrolysis of phosphodiesters of the peptidophosphogalactomannans by the exo-beta-D-galactofuranosidase from Penicillium fellutanum depends on the k(sub cat)/k(sub m) value of each polymer. This ratio increases as the number of phosphodiesters decreases, which in turn increases enzyme activity.

Glycoproteins, Microbial enzymes

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Choline derivatives involved in osmotolerance of Penicillium fellutanum

Article Abstract:

Research was performed to assess the roles played by intracellular glycine betaine, choline-O-sulfate, and exogenous choline in osmoprotection of Penicillium fellutanum under low-phosphate and high-osmolarity conditions. Results revealed that P. fellutanum is osmotolerant and xerotolerant when cultured in a low-phosphate medium containing 3 M NaCl while glycerol and erythritol thrived in cultures with salt concentrations up to 2 M. Also, glycerol was the sole detectable polyol in cultures containing 3 M NaCl.

Glycine, Salt, Salt (Food), Choline

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