Epigenetic Process Monitoring in Live Cultures with Peptide Biosensors

Nur P. Damayanti, Kevin Buno, Sherry L. Voytik Harbin, Joseph M.K. Irudayaraj

Research output: Contribution to journalArticlepeer-review


Acetyltransferase is a member of the transferase group responsible for transferring an acetyl group from acetyl-CoA to amino group of a histone lysine residue. Past efforts on histone acetylation monitoring involved biochemical analysis that do not provide spatiotemporal information in a dynamic format. We propose a novel approach to monitor acetyltransferase acetylation in live single cells using time correlated single photon counting fluorescence lifetime imaging (TCSPC-FLIM) with peptide biosensors. Utilizing 2D and 3D cultures we show that the peptide sensor has a specific response to acetyltransferase enzyme activity in a fluorescence lifetime dependent manner (P < 0.001). Our FLIM biosensor concept enables real-time longitudinal measurement of acetylation activity with high spatial and temporal resolution in live single cells to monitor cell function or evaluate drug effects to treat cancer or neurological diseases.

Original languageEnglish (US)
Pages (from-to)562-565
Number of pages4
JournalACS Sensors
Issue number3
StatePublished - Mar 22 2019


  • FLIM
  • acetylation
  • live cultures
  • peptide sensor
  • real-time detection

ASJC Scopus subject areas

  • Bioengineering
  • Instrumentation
  • Process Chemistry and Technology
  • Fluid Flow and Transfer Processes


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