The Screening and Identification of a Dextranase-Secreting Marine Actinmycete Saccharomonospora sp. K1 and Study of Its Enzymatic Characteristics

• Published in: Marine drugs Vol. 22; no. 2; p. 69
• Main Authors: Wang, Boyan, Wu, Yizhuo, Li, Qiang, Wu, Xudong, Kang, Xinxin, Zhang, Lei, Lyu, Mingsheng, Wang, Shujun
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 28.01.2024
• Subjects: Bacteria; biofilm; Biofilms; Carbon dioxide; characteristics; Chromatography; Cobalt; Dextran; Dextranase; Dextrans; Enzymes; Fermentation; Glucose; High performance liquid chromatography; HPLC; isooligomaltosaccharides; Liquid chromatography; Metal ions; Metals; Microorganisms; Molecular weight; pH effects; Pharmaceutical industry; Phylogenetics; Polymerization; porous starch; Potatoes; rRNA 16S; Saccharomonospora sp; Software; Starch; porous starch; Saccharomonospora sp; characteristics; isooligomaltosaccharides; dextranase; biofilm
• ISSN: 1660-3397; 1660-3397
• DOI: 10.3390/md22020069

In this study, an actinomycete was isolated from sea mud. The strain K1 was identified as sp. by 16S rDNA. The optimal enzyme production temperature, initial pH, time, and concentration of the inducer of this actinomycete strain K1 were 37 °C, pH 8.5, 72 h, and 2% dextran T20 of medium, respectively. Dextranase from strain K1 exhibited maximum activity at 8.5 pH and 50 °C. The molecular weight of the enzyme was <10 kDa. The metal ions Sr and enhanced its activity, whereas Fe and Co had an opposite effect. In addition, high-performance liquid chromatography showed that dextran was mainly hydrolyzed to isomaltoheptose and isomaltopentaose. Also, it could effectively remove biofilms of . Furthermore, it could be used to prepare porous sweet potato starch. This is the first time a dextranase-producing actinomycete strain was screened from marine samples.