Grundy F J, Henkin T M
Department of Biochemistry and Molecular Biology, Albany Medical College, New York 12208.
J Bacteriol. 1994 Apr;176(7):2108-10. doi: 10.1128/jb.176.7.2108-2110.1994.
An amber suppressor variant of Bacillus subtilis tyrosyl-tRNA was constructed and placed under control of the isopropyl-beta-D-thiogalactopyranoside (IPTG)-inducible Pspac promoter. Addition of IPTG resulted in a 50-fold increase in the expression of an rpsD-lacZ fusion containing a UAG amber codon. This system permitted isolation of a conditional lethal mutant which required IPTG for growth.
构建了枯草芽孢杆菌酪氨酰 - tRNA的琥珀抑制变体,并将其置于异丙基 - β - D - 硫代半乳糖苷(IPTG)诱导型Pspac启动子的控制之下。添加IPTG导致含有UAG琥珀密码子的rpsD - lacZ融合蛋白的表达增加了50倍。该系统允许分离出一种条件致死突变体,其生长需要IPTG。