Genetically encoded sensors for calcium and zinc

Amy E. Palmer; Philip Dittmer; Janet E. McCombs

doi:10.1117/12.764262

13 February 2008 Genetically encoded sensors for calcium and zinc

Amy E. Palmer, Philip Dittmer, Janet E. McCombs

Proceedings Volume 6868, Small Animal Whole-Body Optical Imaging Based on Genetically Engineered Probes; 686807 (2008) https://doi.org/10.1117/12.764262
Event: SPIE BiOS, 2008, San Jose, California, United States

Abstract

Our lab focuses on developing fluorescent biosensors based on fluorescence resonance energy transfer (FRET) so that we can monitor signaling ions in living cells. These sensors are comprised of two fluorescent proteins and a sensing domain that undergoes a conformational change upon binding the target ligand. These sensors can be genetically encoded and hence incorporated into cells by transgenic technologies. Here we discuss the latest developments in our efforts to reengineer calcium sensors as well as develop new sensors for zinc. In these efforts we employ a combination of naturally occurring calcium and zinc binding domains, combined with protein engineering. We are also developing new methodologies to screen and sort sensor libraries using optically-integrated microfluidic devices. Thus far, we have targeted sensors to the ER, mitochondria, Golgi, nucleus, and plasma membrane in order to examine the spatial heterogeneity and localization of signaling processes.

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Amy E. Palmer, Philip Dittmer, and Janet E. McCombs "Genetically encoded sensors for calcium and zinc", Proc. SPIE 6868, Small Animal Whole-Body Optical Imaging Based on Genetically Engineered Probes, 686807 (13 February 2008); https://doi.org/10.1117/12.764262

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KEYWORDS

Sensors

Fluorescence resonance energy transfer

Proteins

Calcium

Fluorescent proteins

Zinc

Ions

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