@article{Quantitatively:2579, recid = {2579}, author = {Jani, Maulik Subhash}, title = {NOckout: A DNA-Based Fluorescent Probe to Quantitatively Map NOS3 Activity with Subcellular Spatial Resolution}, publisher = {University of Chicago}, school = {Ph.D.}, address = {2020-08}, pages = {93}, abstract = {Compartmentalized nitric oxide (NO) production drives critical signaling pathways in cells, yet there are no methods to quantitatively image NO with sub-cellular spatial resolution in living systems. Here, we introduce a new DNA-based fluorescent reporter technology that maps NO with sub-cellular resolution in live cells. It combines small molecule NO detection chemistry with the sub-cellular targetability of DNA based scaffold to provide quantifiable NO maps using ratiometric imaging. We could thereby map the activity of Nitric Oxide Synthase 3 (NOS3) which resides at the plasma membrane and the trans-Golgi network. We find that despite its lower abundance, the pool of NOS3 at the plasma membrane is seven-fold more active than Golgi associated NOS3. The ability to quantitatively map NO dynamics with sub-cellular resolution provides the potential to discover selective regulators of distinct NOS3 populations.}, url = {http://knowledge.uchicago.edu/record/2579}, doi = {https://doi.org/10.6082/uchicago.2579}, }