Development of a selective, sensitive, and reversible biosensor by the genetic incorporation of a metal-binding site into green fluorescent protein.
铜离子在生物和环境体系中具有重要作用,但其失衡与多种疾病及污染相关。现有原子吸收、质谱和电化学方法复杂且常破坏样品,难以原位检测。本文通过遗传密码工程将金属螯合非天然氨基酸3,4-二羟基-L-苯丙氨酸(l-DOPA)引入绿色荧光蛋白(GFP),构建了可逆荧光铜离子生物传感器GFPdopa。l-DOPA的儿茶酚基团作为双齿配体与Cu2...