Olaparib based photo-affinity probes for PARP-1 detection in living cells

ABSTRACT: The poly-ADP-ribose polymerase (PARP) is a protein from the family of ADP-ribosyltransferases that catalyzes poly adenosine diphosphate ribose (ADPR) formation in order to attract the DNA repair machinery to DNA damage sites. Inhibition of PARP activity by olaparib can cause cell death which is of clinical relevance in some tumor types. This demonstrates that quantification of PARP activity in the context of living cells is of great importance. In this work we present the design, synthesis and biological evaluation of photo-activatable affinity probes inspired by the olaparib molecule which are equipped with a diazirine for covalent attachment upon activation by UV light and a ligation handle for the addition of a reporter group of choice. SDS-PAGE, western blotting and label-free LC-MS/MS quantification analysis show that the probes target the PARP-1 protein and are selectively outcompeted by olaparib suggesting binding in the same enzymatic pocket.

INSTRUMENT(S): Synapt MS

ORGANISM(S): Homo Sapiens (human)

TISSUE(S): B Cell, Cell Culture

DISEASE(S): Breast Cancer

SUBMITTER: Bogdan Florea  

LAB HEAD: Bogdan Iulius Florea

PROVIDER: PXD018661 | Pride | 2020-04-29

REPOSITORIES: Pride