The deoxysugar biosynthesis gene cluster of calicheamicin contains calS9, which encodes UDP-D-glucose decarboxylase and catalyzes the conversion of UDP-glucuronic acid to UDP-xylose in the presence of NAD+ cofactor. The calS9 was cloned in pET32a(+) and expressed in Escherichia coli BL21(DE3). An enzymatic assay was carried out with the purified CalS9. A one-pot assay was also developed using thymidyl kinase, acetyl kinase, CalS7 and CalS8 to convert UMP to UDP-xylose via UDP-D-glucose and UDP-glucuronic acid. The reaction products were extracted and analyzed by HPLC and ESI-MS for UDP-D-glucose, UDP-glucuronic acid and UDP-xylose, respectively. The deoxysugar biosynthesis of Streptomyces sp. KCTC 0041BP was inactivated by homologous recombination and the S. sp. GerSM2 mutant, which could not produce dihydrochalcomycin, was obtained. calS7, calS8 and calS9 genes were cloned in integrative plasmid pSET152 to generate pBPDS, which was heterologously expressed in S. sp. GerSM2. Finally, the novel glycosylated product, 5-O-xylosyl-chalconolide derivative, in the conjugal transformants was analyzed by LC-MS.
본 학회는 화학, 생화학, 분자생물학, 미생물학, 식품공학, 의학, 약학, 유전공학 및 생물공학, 환경 및 기타 공업 등 전 분야의 탄수화물관련 이론과 기술을 연구 발전시키고 산학협동을 통해 이를 보급하여 국내 관련 산업의 발전 및 국민생활의 과학화에 기여하고자 하며, 이러한 목표와 비젼의 실현을 위해 회원들이 적극적인 참여와 활동을 전개하고자 한다.