期刊
BIOORGANIC & MEDICINAL CHEMISTRY
卷 19, 期 3, 页码 1079-1084出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bmc.2010.07.014
关键词
Hydrogen peroxide; HyPer; HyPer-2; OxyR; Imaging; GFP
资金
- Federal Education Agency [P256]
- Russian Federation [MK-3567.2009.4]
- Russian Academy of Sciences
- Russian Foundation for Basic Research [09-04-12235, 10-04-01561]
- Howard Hughes Medical Institute [55005618]
- FEBS
Hydrogen peroxide is an important second messenger controlling intracellular signaling cascades by selective oxidation of redox active thiolates in proteins. Changes in intracellular [H2O2] can be tracked in real time using HyPer, a ratiometric genetically encoded fluorescent probe. Although HyPer is sensitive and selective for H2O2 due to the properties of its sensing domain derived from the Escherichia coli OxyR protein, many applications may benefit from an improvement of the indicator's dynamic range. We here report HyPer-2, a probe that fills this demand. Upon saturating [H2O2] exposure, HyPer-2 undergoes an up to sixfold increase of the ratio F500/F420 versus a threefold change in HyPer. HyPer-2 was generated by a single point mutation A406V from HyPer corresponding to A233V in wtOxyR. This mutation was previously shown to destabilize interface between monomers in OxyR dimers. However, in HyPer-2, the A233V mutation stabilizes the dimer and expands the dynamic range of the probe. (C) 2010 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据