Palmitoylation-Dependent Small-Molecule Fluorescent Probes for Live-Cell Golgi Imaging

ACS Chem Biol. 2023 May 19;18(5):1047-1053. doi: 10.1021/acschembio.3c00046. Epub 2023 Apr 25.

Abstract

Small-molecule fluorescent probes enabling visualization of the Golgi apparatus in living cells are essential tools for studying Golgi-associated biological processes and diseases. So far, several fluorescent Golgi stains have been developed by linking ceramide lipids to fluorophores. However, ceramide-based probes suffer from cumbersome staining procedures and low Golgi specificity. Here, we introduce fluorescent Golgi-staining probes based on the tri-N-methylated myristoyl-Gly-Cys (myrGC3Me) motif. The cell-permeable myrGC3Me motif localizes to the Golgi membrane upon S-palmitoylation. By modularly conjugating the myrGC3Me motif to fluorophores, we developed blue, green, and red fluorescent Golgi probes, all of which allowed simple and rapid staining of the Golgi in living cells with high specificity and no cytotoxicity. The probe was also applicable to the visualization of dynamic changes of the Golgi morphology induced by drug treatments and during cell division. The present work provides an entirely new series of live-cell Golgi probes useful for cell biological and diagnostic applications.

Publication types

  • Letter
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Ceramides / metabolism
  • Diagnostic Imaging
  • Fluorescent Dyes* / metabolism
  • Golgi Apparatus / metabolism
  • Lipoylation*

Substances

  • Fluorescent Dyes
  • Ceramides