Phosphoproteome landscape of ARID1A and its implications in DNA damage response and breast cancer pathogenesis.

ABSTRACT: ARID1A, a subunit of the SWI/SNF chromatin-remodeling complex, plays a critical role in maintaining genomic stability and regulating estrogen receptor (ER) signaling, yet its phosphorylation dynamics in cancer remain underexplored. This study employed phosphoproteomic analysis to investigate ARID1A phosphorylation in breast cancer, identifying predominant phosphosites-S363, S1184, and S696-regulated by kinases such as MAPK14, CDK16, and MAPK9. Functional enrichment revealed ARID1A interactions with SWI/SNF components (e.g., PBRM1, SMARCC2, BRD9) and DNA damage response (DDR) proteins (e.g., TP53BP1, TOP2A, CHEK2, NBN), underscoring its dual role in chromatin remodeling and double-strand break repair. Notably, phosphorylation at S363 and S1184 was significantly upregulated in breast cancer,

SUBMITTER: Kumar APKA 

PROVIDER: S-EPMC12909702 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature