내열성 포도당 이성화효소를 생산하는 Streptomyces chibaensis J-59의 분리 및 동정

  • 발행 : 1997.02.01

초록

A bacterial strain J-59 was isolated from a humus soil, which produced simultaneously a thermostable glucose isomerase as well as xylanase. The morphological, cultural and physiological characteristics of the isoisomerase strain J-59 were detemined by the use of the media and methods described in International Streptomyces Project. The chemotaxonomic characteristics of the isolated strain J-59 were determined by the analysis of G+C molar % of DNA, diaminipimelic acid, composition of fatty acid and menaquinone. As the results of various examinations, the strain J-59 was identified to be Streptomyces chibaensis. This strain produced glucose isomerase intracellularly and xylanase extracellularly when grown in a medium containing xylan, but it was not able to utilize the xylose or xylan as a carbon source. The glucose isomerase of S. chibaensis J59 was highly thermostable, which retained more than 75% activity in the presence of Co$^{2+}$ at 80$\circ $C for 72 h.

키워드

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