title: Inhibition of green tea and the catechins against 1-deoxy-d-xylulose 5-phosphate reductoisomerase, the key enzyme of the MEP terpenoid biosynthetic pathway.
abstract: 1-Deoxy-d-xylulose 5-phosphate reductoisomerase (DXR) is the first committed enzyme in the MEP terpenoid biosynthetic pathway and also a validated antimicrobial target. Green tea which is rich in polyphenolic components such as the catechins, possesses a plenty of pharmacological activities, in particular an antibacterial effect. To uncover the antibacterial mechanism of green tea and to seek new DXR inhibitors from natural sources, the DXR inhibitory activity of green tea and its main antimicrobial catechins were investigated in this study. The results show that the raw extract of green tea and its ethyl acetate fraction are able to suppress DXR activity explicitly. Further determination of the DXR inhibitory capacity of eight catechin compounds demonstrates that the most active compound is gallocatechin gallate that is able to inhibit around 50% activity of DXR at 25μM. Based on these data, the primary structure-activity relationship of the catechins against DXR is discussed. This study would be very helpful to elucidate the antimicrobial mechanism of green tea and the catechins and also would be very useful to direct the rational utilization of them as food additives.
authors.affiliation: Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences, Northwest University, 229 North Taibai Road, Xi'an, Shaanxi 710069, China.
authors.forename: Xian
authors.initials: X
authors.lastname: Hui
authors.affiliation: Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences, Northwest University, 229 North Taibai Road, Xi'an, Shaanxi 710069, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Liu
authors.affiliation: Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences, Northwest University, 229 North Taibai Road, Xi'an, Shaanxi 710069, China.
authors.forename: Fang-Lin
authors.initials: FL
authors.lastname: Tian
authors.affiliation: Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences, Northwest University, 229 North Taibai Road, Xi'an, Shaanxi 710069, China.
authors.forename: Fei-Fei
authors.initials: FF
authors.lastname: Li
authors.affiliation: Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences, Northwest University, 229 North Taibai Road, Xi'an, Shaanxi 710069, China.
authors.forename: Heng
authors.initials: H
authors.lastname: Li
authors.affiliation: Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences, Northwest University, 229 North Taibai Road, Xi'an, Shaanxi 710069, China. Electronic address: gaowenyun@nwu.edu.cn.
authors.forename: Wen-Yun
authors.initials: WY
authors.lastname: Gao
mesh_terms: D019747:Aldose-Ketose Isomerases / Q000037:antagonists & inhibitors*; D000900:Anti-Bacterial Agents / Q000737:chemistry* / Q000302:isolation & purification; D053898:Biosynthetic Pathways / Q000187:drug effects; D002392:Catechin / Q000031:analogs & derivatives / Q000737:chemistry* / Q000302:isolation & purification; D010936:Plant Extracts / Q000737:chemistry; D013329:Structure-Activity Relationship; D013662:Tea / Q000737:chemistry*; D013729:Terpenes / Q000737:chemistry*
chemical_list: D000900:Anti-Bacterial Agents; D010936:Plant Extracts; D013662:Tea; D013729:Terpenes; C417940:gallocatechin gallate; D002392:Catechin; C114231:1-deoxy-D-xylulose 5-phosphate reductoisomerase; D019747:Aldose-Ketose Isomerases
keywords: 1-deoxy-d-xylulose 5-phosphate reductoisomerase; Catechins; Epigallocatechin gallate (PubChem CID: 65064); Gallocatechin gallate (PubChem CID: 5276890); Green tea; Inhibition; MEP pathway