A highly photostable and bright green fluorescent protein

The low photostability of fluorescent proteins is a limiting factor in many applications of fluorescence microscopy. Here we present StayGold, a green fluorescent protein (GFP) derived from the jellyfish Cytaeis uchidae. StayGold is over one order of magnitude more photostable than any currently available fluorescent protein and has a cellular brightness similar to mNeonGreen. We used StayGold to image the dynamics of the endoplasmic reticulum (ER) with high spatiotemporal resolution over several minutes using structured illumination microscopy (SIM) and observed substantially less photobleaching than with a GFP variant optimized for stability in the ER. Using StayGold fusions and SIM, we also imaged the…

• JA
  Japan Agency for Medical Research and Development

  Awards: JP21dm0207991, JP15dm0207001, CREST
• MO
  Ministry of Education, Culture, Sports, Science and Technology

  Award: CREST
• UO
  University of Tokyo

  Award: COVID-19
• UO
  University of Tsukuba
• UO
  University of the Ryukyus
• R
  RIKEN
• CR
  Core Research for Evolutional Science and Technology