FLUORESCENT FUSION POLYPEPTIDE BIOSENSOR COMPRISING SAID POLYPEPTIDE AND USES THEREOF

摘要

The present invention refers to a fluorescent fusion polypeptide capable of changing its localization within the cell from the cell cytoplasmic membrane to the retention vesicles upon an increase in the concentration of second messengers within the cell cytoplasm comprising a membrane localization peptide a second messenger transduction protein binding peptide a reticulum retention signal and a fluorescent peptide wherein: a. the membrane localization peptide is located at the N terminus of the fluorescent fusion polypeptide and is physically bound optionally through a linker to the fluorescent peptide which in turn is physically bound optionally through a linker to the second messenger transduction protein binding peptide; and b. the second messenger transduction protein binding peptide is physically bound optionally through a linker to the reticulum retention signal which in turn is located at the C terminus of the fluorescent fusion polypeptide.