TY - JOUR
T1 - moxMaple3
T2 - a Photoswitchable Fluorescent Protein for PALM and Protein Highlighting in Oxidizing Cellular Environments
AU - Kaberniuk, Andrii A.
AU - Mohr, Manuel A.
AU - Verkhusha, Vladislav V.
AU - Snapp, Erik Lee
N1 - Funding Information:
This work was supported by the Howard Hughes Medical Institute (to E.L.S.) and GM122567 and NS103573 grants from the National Institutes of Health (to V.V.V.). Thanks to Jenny Hagemeier (Janelia Cell Culture Facility) for providing transfected HeLa cells for PALM experiments. The content is solely the responsibility of the authors and does not necessarily represent the official views of the HHMI or NIH.
Publisher Copyright:
© 2018, The Author(s).
PY - 2018/12/1
Y1 - 2018/12/1
N2 - The ability of fluorescent proteins (FPs) to fold robustly is fundamental to the autocatalytic formation of the chromophore. While the importance of the tertiary protein structure is well appreciated, the impact of individual amino acid mutations for FPs is often not intuitive and requires direct testing. In this study, we describe the engineering of a monomeric photoswitchable FP, moxMaple3, for use in oxidizing cellular environments, especially the eukaryotic secretory pathway. Surprisingly, a point mutation to replace a cysteine substantially improved the yield of correctly folded FP capable of chromophore formation, regardless of cellular environment. The improved folding of moxMaple3 increases the fraction of visibly tagged fusion proteins, as well as FP performance in PALM super-resolution microscopy, and thus makes moxMaple3 a robust monomeric FP choice for PALM and optical highlighting applications.
AB - The ability of fluorescent proteins (FPs) to fold robustly is fundamental to the autocatalytic formation of the chromophore. While the importance of the tertiary protein structure is well appreciated, the impact of individual amino acid mutations for FPs is often not intuitive and requires direct testing. In this study, we describe the engineering of a monomeric photoswitchable FP, moxMaple3, for use in oxidizing cellular environments, especially the eukaryotic secretory pathway. Surprisingly, a point mutation to replace a cysteine substantially improved the yield of correctly folded FP capable of chromophore formation, regardless of cellular environment. The improved folding of moxMaple3 increases the fraction of visibly tagged fusion proteins, as well as FP performance in PALM super-resolution microscopy, and thus makes moxMaple3 a robust monomeric FP choice for PALM and optical highlighting applications.
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U2 - 10.1038/s41598-018-32955-5
DO - 10.1038/s41598-018-32955-5
M3 - Article
C2 - 30283009
AN - SCOPUS:85054337893
VL - 8
JO - Scientific Reports
JF - Scientific Reports
SN - 2045-2322
IS - 1
M1 - 14738
ER -