title: [Cloning and expression of tyrosinase-encoding gene (mel) of Bacillus thuringiensis and its initial research of application].
abstract: Tyrosinase, which is encoded by Tyrosinase gene (mel), is the key enzyme in the process of melanin formation in animals, plants and microorganisms. Using the primers designed by comparing the conserved domain of tyrosinase, a DNA fragment was amplified which contain the mel gene from Bacillus thuringiensis 4D11. The recombinant E. coli EMB1179 was gained by subcloning this DNA fragment onto the vector pGEM-7zf and transformed it into E. coli DH5alpha. EMB1179 express the tyrosinase activity and produce melanin under the presence of L-tyrosin. The effect of melanin on survival of E. coli was also determined. The results showed that the melanin produced by EMB1179 effectively increased its resistance against UV light.
authors.affiliation: State Key Laboratory of Agricultural Microbiology, Huazhong Agriculture University, Wuhan 430070, China. myway@webmail.hzau.edu.cn
authors.forename: Wei
authors.initials: W
authors.lastname: He
authors.forename: Li-Fang
authors.initials: LF
authors.lastname: Ruan
authors.forename: Ming
authors.initials: M
authors.lastname: Sun
authors.forename: Xi-Xi
authors.initials: XX
authors.lastname: Li
authors.forename: Zi-Niu
authors.initials: ZN
authors.lastname: Yu
mesh_terms: D001413:Bacillus thuringiensis / Q000201:enzymology* / Q000235:genetics; D003001:Cloning, Molecular; D004926:Escherichia coli / Q000235:genetics / Q000528:radiation effects; D008543:Melanins / Q000096:biosynthesis; D014442:Monophenol Monooxygenase / Q000032:analysis / Q000235:genetics*; D014466:Ultraviolet Rays
chemical_list: D008543:Melanins; D014442:Monophenol Monooxygenase