PBRM1 acts as a p53 lysine-acetylation reader to suppress renal tumor growth

Nat Commun. 2019 Dec 20;10(1):5800. doi: 10.1038/s41467-019-13608-1.


p53 acetylation is indispensable for its transcriptional activity and tumor suppressive function. However, the identity of reader protein(s) for p53 acetylation remains elusive. PBRM1, the second most highly mutated tumor suppressor gene in kidney cancer, encodes PBRM1. Here, we identify PBRM1 as a reader for p53 acetylation on lysine 382 (K382Ac) through its bromodomain 4 (BD4). Notably, mutations on key residues of BD4 disrupt recognition of p53 K382Ac. The mutation in BD4 also reduces p53 binding to promoters of target genes such as CDKN1A (p21). Consequently, the PBRM1 BD4 mutant fails to fully support p53 transcriptional activity and is defective as a tumor suppressor. We also find that expressions of PBRM1 and p21 correlate with each other in human kidney cancer samples. Our findings uncover a tumor suppressive mechanism of PBRM1 in kidney cancer and provide a mechanistic insight into the crosstalk between p53 and SWI/SNF complexes.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Acetylation
  • Animals
  • Cell Line, Tumor
  • Cyclin-Dependent Kinase Inhibitor p21 / genetics*
  • DNA-Binding Proteins / genetics
  • DNA-Binding Proteins / metabolism*
  • Gene Expression Regulation, Neoplastic*
  • Gene Knockout Techniques
  • HEK293 Cells
  • Humans
  • Kidney / pathology
  • Kidney Neoplasms / genetics*
  • Kidney Neoplasms / pathology
  • Lysine / metabolism
  • Male
  • Mice
  • Mutation
  • Promoter Regions, Genetic
  • Protein Binding / genetics
  • Protein Domains / genetics
  • Transcription Factors / genetics
  • Transcription Factors / metabolism*
  • Tumor Suppressor Protein p53 / genetics
  • Tumor Suppressor Protein p53 / metabolism*
  • Xenograft Model Antitumor Assays


  • CDKN1A protein, human
  • Cyclin-Dependent Kinase Inhibitor p21
  • DNA-Binding Proteins
  • PBRM1 protein, human
  • TP53 protein, human
  • Transcription Factors
  • Tumor Suppressor Protein p53
  • Lysine