Proteomics

Dataset Information

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PALB2 ChAM acetylation mapping in human cells


ABSTRACT: The Chromatin Association Motif (ChAM) of the PArtner and Localizer of BRCA2 (PALB2) is essential for DNA repair function by homologous recombination in human cells. Molecular mechanisms governing ChAM interaction with chromatin remain unexplored. In this study, we have mapped acetylated lysines within ChAM domain, which are contained within a region essential to regulate its association with chromatin. GFP-ChAM sample submitted for proteomics analysis for acetylated lysines mapping was purified from HEK293T transiently expressing GFP-ChAM. GFP-ChAM was purified by GFP pull down using GFP-Trap agarose beads (Chromotek) and washed at 250mM NaCl.

INSTRUMENT(S): Q Exactive

ORGANISM(S): Homo Sapiens (human)

SUBMITTER: Marjorie Fournier  

LAB HEAD: Fumiko Esashi

PROVIDER: PXD014678 | Pride | 2023-03-10

REPOSITORIES: Pride

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Publications


The tumour suppressor PALB2 stimulates RAD51-mediated homologous recombination (HR) repair of DNA damage, whilst its steady-state association with active genes protects these loci from replication stress. Here, we report that the lysine acetyltransferases 2A and 2B (KAT2A/2B, also called GCN5/PCAF), two well-known transcriptional regulators, acetylate a cluster of seven lysine residues (7K-patch) within the PALB2 chromatin association motif (ChAM) and, in this way, regulate context-dependent PAL  ...[more]

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