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- W2077881877 abstract "The formation of S-nitrosylated proteins is a nitric oxide-dependent post-translational modification important in signal transduction, yet the in situ detection of S-nitrosylated proteins remains problematic. In this study, we adapted a recently developed biotin derivatization approach to visualize S-nitrosylated proteins in intact cells. This strategy circumvents the use of antibodies directed against S-nitrosocysteine, which may have problematic specificity, due to epitope instability. Endogenous protein S-nitrosylation could be observed in intact cells and in mouse lung sections using fluorophore-conjugated streptavidin and confocal microscopy, and was enhanced by S-nitrosothiols and reduced following treatment with the nitric oxide synthase inhibitor, l-N-monomethyl arginine. Intriguingly, protein S-nitrosylation was detected mainly in the nuclear compartment of cells under baseline conditions and was enhanced when nuclear export was blocked with leptomycin B. We also determined that the small GTPase Ran, a key regulator of nucleocytoplasmic transport, is a target for S-nitrosylation. These findings demonstrate that biotin derivatization is a useful approach to detect S-nitrosylated proteins in situ in cellular compartments or tissues, and will be useful in the assessment of altered S-nitrosylation in pathological conditions." @default.
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- W2077881877 date "2004-11-01" @default.
- W2077881877 modified "2023-09-27" @default.
- W2077881877 title "In situ detection and visualization of S-nitrosylated proteins following chemical derivatization: identification of Ran GTPase as a target for S-nitrosylation" @default.
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- W2077881877 doi "https://doi.org/10.1016/j.niox.2004.06.002" @default.
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