Nutritional regulation of keratinolytic activity in Bacillus pumilis

Characterization of the keratinolytic activity of indigenous Bacillus subtilis keratinase

Keratins are water insoluble proteins of our environment. Being extremely resistant to degradation by proteolytic enzymes, keratins are digested mainly by alkali and keratinase enzymes. The aim of present study was to characterize the indigenous keratinase for potentials of keratin-degrading activities. We report the purification and characterization of keratinase from Bacillus subtilis isolate...

Keratinolytic Potential of Feather-Degrading Bacillus polymyxa and Bacillus cereus

Keratinolytic abilities of Bacillus polymyxa B20 and B. cereus B5esz were evaluated in liquid cultures in mineral media containing chicken feathers. Both tested strains were capable of effective liquefying and biodegradation of feather keratin, up to 56.5 – 72.1% in ten-day cultures, releasing considerable amounts of hydrolysis products. Tested bacteria were mesophilic species, producing highes...

comparison of catalytic activity of heteropoly compounds in the synthesis of bis(indolyl)alkanes.

heteropoly acids (hpa) and their salts have advantages as catalysts which make them both economically and environmentally attractive, strong br?nsted acidity, exhibiting fast reversible multi-electron redox transformations under rather mild conditions, very high solubility in polar solvents, fairly high thermal stability in the solid states, and efficient oxidizing ability, so that they are imp...

Studies on Keratinolytic Activity of Alkaline Proteases from Halophilic Bacteria

Alkaline proteases producing halophilic bacteria isolated from Sambar Lake, Rajasthan were investigated for keratinolytic activity. The aim of this study was to optimize culture conditions for maximum enzyme production as well as characterization of proteases with keratinolytic action. Casein was used as sole carbon and nitrogen source for alkaline protease production at 37°C and 150 rpm. Highe...

Regulation of σB Levels and Activity in Bacillus subtilis