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자료유형
학술저널
저자정보
박제권 (가천대학교) 송지오 (가천대학교) 김규현 (가천대학교) 김효은 (가천대학교) 구본건 (전북대학교)
저널정보
한국키틴키토산학회 Journal of Chitin and Chitosan Journal of Chitin and Chitosan Vol.28 No.2
발행연도
2023.6
수록면
51 - 61 (11page)

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The kinetic properties of chitosanase according to chemical and structural modifications of chitosan were evaluated by relative enzyme activity and bioactivity of hydrolysates. Changes in the specificity of the chitosanase for the substrate showed a significant difference under the optimal reaction conditions. The increase of reducing sugar content according to the activity of the chitosanase was significantly observed against carboxymethyl-chitosan (CM-CTSN) compared to glycol chitosan (GL-CTSN) and water-soluble chitosan (WSC) used as a control. Each chitooligosaccharide designated to COS, CM-COS, and GL-COS showed similar results in various antioxidant activity evaluations so that no significant difference could be confirmed. Significant antibacterial activities of three types of water-soluble chitosan derived COS, CM-COS, and GL-COS against Escherichia coli and methicillin-resistant Staphylococcus aureus (MRSA) were not confirmed. However, both ferric reducing antioxidant power (FRAP) and 2,2’-azino-bis (3-ethylbenzothiazoline 6-sulfonic acid) diammonium salt (ABTS) radical scavenging ability confirmed their significant antioxidant activity, but it was evaluated as irrelevant to the difference in molecular weight. Although there is a clear difference in the substrate specificity of the enzyme depending on the chemical structural modification of chitosan, our results suggest that the biological activity of COS was not significantly affected regardless of the presence or absence of a water-soluble functional group. Therefore, based on the results of this study, we suggest the need for follow-up studies to investigate the correlation between the water solubility of chitosan, enzymatic activity, and biological activity.

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