A Semisynthetic Fluorescent Sensor Protein for Glutamate
作者:Matthias A. Brun、Kui-Thong Tan、Rudolf Griss、Anna Kielkowska、Luc Reymond、Kai Johnsson
DOI:10.1021/ja3002277
日期:2012.5.9
We report the semisynthesis of a fluorescent glutamate sensor protein on cell surfaces. Sensor excitation at 547 nm yields a glutamate-dependent emission spectrum between 550 and 700 nm that can be exploited for ratiometric sensing. On cells, the sensor displays a ratiometric change of 1.56. The high sensitivity toward glutamate concentration changes of the sensor and its exclusive extracellular localization make it an attractive tool for glutamate sensing in neurobiology.