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Indian Journal of Microbiology logoLink to Indian Journal of Microbiology
. 2010 Mar 9;50(Suppl 1):41–45. doi: 10.1007/s12088-010-0014-0

Production of feather hydrolysate by Elizabethkingia meningoseptica KB042 (MTCC 8360) in submerged fermentation

Swetlana Nagal 1,✉, P C Jain 1
PMCID: PMC3396395  PMID: 22815570

Abstract

A keratinolytic bacterium Elizabethkingia meningoseptica KB042 was isolated from dropped off feathers. The bacterium showed 82.50 ± 0.3% feather degradation when grown on medium containing 10 g/l chicken feathers with initial pH 7.0 at 37°C, 150 rpm in 6 days. The pH of the medium was increased up to 10.02 ± 0.10 during 6 days of incubation. Soluble protein and amino acids concentration in the culture fluid was also found increased until the end of incubation. During the cultivation of strain KB042 on feather as sole source of carbon and nitrogen, the maximum cysteine release was noted on the 3rd day. Varying feather concentration 1.0–2.0% in basal medium resulted in soluble protein release between 1814.42 and 1954.61 μg/ml. The amino acid concentration was found to be maximum, i.e. 937.85 ± 11.9 μg/ml in the cultures grown with 2% feather. The hydrolysate was also found rich in essential amino acids valine, tryptophan, threonine, leucine and cysteine and contains minor amount of methionine and arginine. These data indicate a potential biotechnology for biotransformation and utilization of feather keratin as a source of protein which can be used as animal feed after successful animal trials.

Keywords: Poultry waste, Feather, Elizabethkingia meningoseptica KB042, Soluble protein, Amino acids

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