Go-Eun Kim, Eun-Seong Seo, Sun-Hwa Jung, Jaeho Cha, Eui-Joong Kim, Doman Kim
언어
영어(ENG)
URL
https://www.earticle.net/Article/A192586
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원문정보
초록
영어
Hydroquinone galactoside (HQ-Gal) as a potential skin whitening agent was synthesized by the reaction of lactase (β-galactosidase) from Kluyveromyces lactis, Aspergillus oryzae, Bacillus circulans and Thermus sp. with lactose as a donor and HQ as an acceptor. Among these lactases, the acceptor reaction involving HQ and lactose with K.lactis lactase showed higher conversion ratio to HQ-Gal(60.27%). HQ-Gal was purified using butanol partitioning and silica-gel column chromatography. The structure of the purified HQ-Gal was determined by nuclear magnetic resonance and the ionic product was observed at m/z 295(C12H16O7Na)+ using matrix assisted laser desorption ionization time-of-flight mass spectrometry. HQ-Gal was identified as 4-hydroxyphenyl-β-D-galactopyranoside. The optimum conditions for HQ-Gal synthesis by K.lactis determined using response surface methodology were 50 mM HQ, 60 mM lactose, and 20 U mL-1 lactase. These conditions produced a yield of 2.01 g L-1 HQ-Gal. The half maximal inhibitory concentration (IC50) of diphenylpicryl-hydrazyl radical scavenging activity was 3.31 mM indicating a similar anti-oxidant activity compared to β-arbutin(IC50=3.95 mM). The Ki value of HQ-Gal(0.75 mM) against tyrosinase was smaller than that of β-arbutin (Ki=1.97 mM),indicating superiority as an inhibitor.
저자
Go-Eun Kim [ Interdisciplinary Program of Graduate School for Bioenergy and Biomaterials, Chonnam National University ]
Eun-Seong Seo [ School of Biological Sciences and Technology and Research Institute for Catalysis, Chonnam National University ]
Sun-Hwa Jung [ Interdisciplinary Program of Graduate School for Bioenergy and Biomaterials, Chonnam National University ]
Jaeho Cha [ Department of Microbiology, College of Natural Sciences, Pusan National University ]
Eui-Joong Kim [ GenoFocus Inc. ]
Doman Kim [ Interdisciplinary Program of Graduate School for Bioenergy and Biomaterials, Chonnam National University, School of Biological Sciences and Technology and Research Institute for Catalysis, Chonnam National University ]
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.