Ultrasensitive Genetically Encoded Indicator for Hydrogen Peroxide Identifies Roles for the Oxidant in Cell Migration and Mitochondrial Function.

ABSTRACT: Hydrogen peroxide (H₂O₂) is a key redox intermediate generated within cells. Existing probes for H₂O₂ have not solved the problem of detection of the ultra-low concentrations of the oxidant: these reporters are not sensitive enough, or pH-dependent, or insufficiently bright, or not functional in mammalian cells, or have poor dynamic range. Here we present HyPer7, the first bright, pH-stable, ultrafast, and ultrasensitive ratiometric H₂O₂ probe. HyPer7 is fully functional in mammalian cells and in other higher eukaryotes. The probe consists of a circularly permuted GFP integrated into the ultrasensitive OxyR domain from Neisseria meningitidis. Using HyPer7, we were able to uncover the details of H₂O₂ dif

SUBMITTER: Pak VV 

PROVIDER: S-EPMC7088435 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature