MAPPING OF THE SITES OF PHOSPHORYLATION &DEPHOSPHORYLATION IN PROTEINS

$8,199P41FY2000RRNIH

Rockefeller University, New York NY

Investigators

Linked publications & trials

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Abstract

We have devised a new strategy for the mapping of sites of phosphorylation/ dephosphorylation in proteins using enzyme proteolysis in combination with MALDI-ion trap mass spectrometry. The strategy relies on the rapid recognition of peptides that contain sites of phosphorylation by the use of a signature of pairs of peaks separated by 98 Da. The strategy has been used to map sites of phosphorylation/dephosphorylation in a number of different systems including the synapsins and regulatory domain of the CFTR chloride channel. A paper describing this work has been published (Qin and Chait, Anal. Chem. 69, 4002-4009, 1997).

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