کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1385992 | 982467 | 2009 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Degradation of chitin and production of bioactive materials by bioconversion of squid pens Degradation of chitin and production of bioactive materials by bioconversion of squid pens](/preview/png/1385992.png)
Serratia marcescens TKU011, a protease- and chitosanase-producing bacterium, the optimized condition for protease and chitosanase production was found after the media were heated at 121 °C for 120 min and the culture was shaken at 25 °C for 5 days in 100 mL of medium containing 1% squid pen powder (SPP) (w/v), 0.1% K2HPO4, and 0.05% MgSO4. An extracellular metalloprotease with novel properties of solvent stable, and alkaline was purified from the culture supernatant of S. marcescens TKU011 with squid pen wastes as the sole carbon/nitrogen source. The enzyme was a monomeric protease with a molecular mass of 48–50 kDa by SDS–PAGE and gel filtration chromatography. The optimum pH, optimum temperature, pH stability, and thermal stability of TKU011 protease were 8, 50 °C, pH 5–11, and <40 °C, respectively. Besides protease and chitosanase, with this method, deproteinization of squid pen for β-chitin, the production of peptide and reducing sugar may be useful for biological applications.
Journal: Carbohydrate Polymers - Volume 78, Issue 2, 5 September 2009, Pages 205–212