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    Title: Purification and characterization of chitinases and chitosanases from a new species strain Pseudomonas sp. TKU015 using shrimp shells as a substrate
    Authors: Wang, San-Lang;Chen, Shin-Jen;Wang, Chuan-Lu
    Contributors: 淡江大學生命科學研究所
    Keywords: Aquaculture;Bacteria;Molecular weight;Purification;Chitinase;Chitosanase;Pseudomonas;Shrimp shell wastes;Enzyme activity;carbon;chitin;chitinase;chitosan;chitosanase;copper;iron;manganese;nitrogen;article;carbon source;culture medium;deacetylation;enzyme activity;enzyme purification;molecular weight;nonhuman;nucleotide sequence;pH;polyacrylamide gel electrophoresis;priority journal;Pseudomonas;shrimp;temperature;thermostability;Acetylation;Animals;Carbon;Chitin;Chitinase;Chitosan;Culture Media;Decapoda (Crustacea);Ferrous Compounds;Glycoside Hydrolases;Hydrogen-Ion Concentration;Manganese Compounds;Molecular Sequence Data;Molecular Weight;Nitrogen;Pseudomonas;Sepharose;Substrate Specificity;Temperature;Decapoda (Crustacea);Pseudomonas;Pseudomonas sp.
    Date: 2008-05
    Issue Date: 2013-02-27 09:39:55 (UTC+8)
    Publisher: Kidlington: Pergamon
    Abstract: A chitinase (CHT1) and a chitosanase (CHS1) were purified from the culture supernatant of Pseudomonas sp. TKU015 with shrimp shell wastes as the sole carbon and nitrogen source. The optimized conditions of this new species strain (Gen Bank Accession Number EU103629) for the production of chitinases were found to be when the culture was shaken at 30 °C for 3 days in 100 mL of medium (pH 8) containing 0.5% shrimp shell powder (SSP) (w/v), 0.1% K2HPO4, and 0.05% MgSO4·7H2O. The molecular weights of CHT1 and CHS1 determined by SDS–PAGE were approximately 68 kDa and 30 kDa, respectively. The optimum pH, optimum temperature, pH stability, and the thermal stability of CHT1 and CHS1 were pH 6, 50 °C, pH 5–7, <50 °C and pH 4, 50 °C, pH 3–9, <50 °C, respectively. CHT1 was inhibited completely by Mn2+ and Fe2+, and CHS1 was inhibited by Mn2+, Cu2+, and PMSF. CHT1 was only specific to chitin substrates, whereas the relative activity of CHS1 increased when the degree of deacetylation of soluble chitosan increased.
    Relation: Carbohydrate Research 343(7), pp.1171-1179
    DOI: 10.1016/j.carres.2008.03.018
    Appears in Collections:[Graduate Institue of Life Sciences] Journal Article

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