Live-cell transforms between Ca2+ transients and FRET responses for a troponin-C-based Ca2+ sensor.

ABSTRACT: Genetically encoded Ca(2+) sensors promise sustained in vivo detection of Ca(2+) signals. However, these sensors are sometimes challenged by inconsistent performance and slow/uncertain kinetic responsiveness. The former challenge may arise because most sensors employ calmodulin (CaM) as the Ca(2+)-sensing module, such that interference via endogenous CaM may result. One class of sensors that could minimize this concern utilizes troponin C as the Ca(2+) sensor. Here, we therefore probed the reliability and kinetics of one representative of this class (cyan fluorescence protein/yellow fluorescent protein-fluorescence resonance energy transfer (FRET) sensor TN-L15) within cardiac ventricular myocytes. These cells furnished a pertinent live-cell test environment, given substantial endogenous C

SUBMITTER: Tay LH 

PROVIDER: S-EPMC2084226 | biostudies-literature | 2007 Dec

REPOSITORIES: biostudies-literature