A glucose-based molecular rotor inhibitor of glycogen phosphorylase as a probe of cellular enzymatic function
作者:Michail-Panagiotis Minadakis、Konstantinos F. Mavreas、Dionysios D. Neofytos、Maria Paschou、Artemis Kogkaki、Varvara Athanasiou、Michael Mamais、Daniele Veclani、Hermis Iatrou、Alessandro Venturini、Evangelia D. Chrysina、Panagiota Papazafiri、Thanasis Gimisis
DOI:10.1039/d1ob02211c
日期:——
that RotA is a molecular rotor. When bound in the catalytic channel of RMGPb, it behaved as a light switch, generating a strong fluorescence signal, allowing utilization of RotA as a probe that locates glycogen phosphorylase (GP). RotA, mono-, di- and per-acetylated derivatives, as well as nanoparticles with RotA encapsulated in polyethylene glycol-poly-L-histidine, were used in live cell fluorescence
分子转子属于以分子开关为特征的荧光化合物家族,其中荧光开/关信号表示分子微环境的变化。本文报道了( E )-2-cyano-3-( p -(二甲基氨基)苯基) -N- (β- D-吡喃葡萄糖基)丙烯酰胺( RotA )的成功合成和详细研究。RotA被发现是兔肌糖原磷酸化酶 (RMGP b ) 的强抑制剂,它与酶的催化位点结合。RotA与 RMGP b催化位点残基的相互作用通过 X 射线晶体学测定。光谱研究结合理论计算证明RotA是一种分子转子。当结合在 RMGP b的催化通道中时,它充当光开关,产生强烈的荧光信号,允许利用RotA作为定位糖原磷酸化酶 (GP) 的探针。RotA、单乙酰化、双乙酰化和全乙酰化衍生物,以及包裹在聚乙二醇-聚-L-组氨酸中的RotA纳米颗粒,用于活细胞荧光显微成像以测试RotA的传递通过 HepG2 和 A431 细胞的质膜,纳米颗粒提供最佳结果。一旦进入细胞内环境,RotA在细胞生长和