한국미생물·생명공학회지 (Microbiology and Biotechnology Letters)

  • 제40권4호
  • /
  • Pages.303-309
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  • 2012
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  • 1598-642X(pISSN)
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  • 2234-7305(eISSN)
한국미생물·생명공학회 (The Korean Society for Microbiology and Biotechnology)
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Isolation and Characterization of a Feather Degrading Alkalophilic Streptomyces sp. TBG-S13A5 and its Keratinolytic Properties

  • 투고 : 2012.05.15
  • 심사 : 2012.10.02
  • 발행 : 2012.12.28
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초록

Keratinases are of particular interest because of their action on insoluble keratins and generally on a broad range of protein substrates. Alkalophilic and neutrophilic actinomycete strains isolated from different soil samples, rich in keratinaceous substances were screened for keratinolytic activity. An alkalophilic isolate, TBG-S13A5, was found to possess good keratinolytic activity and was able to utilize feather as the sole carbon and nitrogen source. TBG-S13A5 exhibited an off-white aerial mass color with a rectus-flexibilis type of spore chain. The morphological, microscopical and biochemical characters were comparable with that of Streptomyces albidoflavus. Fatty acid methyl ester profiling (FAME) and 16S rDNA sequence analysis confirmed its identity as a strain of S. albidoflavus. Under submerged fermentation conditions, maximum protease production was recorded on the $5^{th}$ day of incubation at $30^{\circ}C$, using basal broth of pH 9.0 with 0.25% (w/v) white chicken feather. This strain could affect feather degradation when the initial pH was 8 and above and maximum protease production was recorded when the initial pH was around 10.5. The effectiveness of the crude enzyme in destaining and leather dehairing were also demonstrated.

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참고문헌

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