doi: 10.1007/s10529-007-9567-3.
Epub 2007 Oct 30.
Nutritional regulation of keratinolytic activity in Bacillus pumilis
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- PMID: 17968508
- DOI: 10.1007/s10529-007-9567-3
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Nutritional regulation of keratinolytic activity in Bacillus pumilis
Biotechnol Lett.
2008 Mar.
Erratum in
- Biotechnol Lett. 2008 Apr;30(4):775-6
Abstract
Bacillus pumilis F3-4 utilized feather as a sole source of carbon, nitrogen and sulfur. Supplementation of the feather medium with glucose or MgSO(4) . 7H(2)O increased keratinolytic protease production (14.6-16.7 U/mg). The synthesis of keratinolytic protease was repressed by an exogenous nitrogen source. Keratinolytic protease was produced in the absence of feather (9.4 U/mg). Feather degradation resulted in sulfhydryl group formation (0.8-2.6 microM). B. pumilis F3-4 effectively degraded chicken feather (75%), duck feather (81%) and feather meal (97%), whereas human nails, human hair and sheep wool under went less degradation (9-15%).
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