Aequorea’s secrets revealed : new fluorescent proteins with unique properties for bioimaging and biosensing

Gerard G. Lambert, Hadrien Depernet, Guillaume Gotthard, Darrin T. Schultz, Isabelle Navizet, Talley Lambert, Stephen R. Adams, Albertina Torreblanca-Zanca, Meihua Chu, Daphne S. Bindels, Vincent Levesque, Jennifer Nero Moffatt, Anya Salih, Antoine Royant, Nathan C. Shaner

Research output: Contribution to journalArticlepeer-review

Abstract

Using mRNA sequencing and de novo transcriptome assembly, we identified, cloned, and characterized 9 previously undiscovered fluorescent protein (FP) homologs from Aequorea victoria and a related Aequorea species, with most sequences highly divergent from A. victoria green fluorescent protein (avGFP). Among these FPs are the brightest green fluorescent protein (GFP) homolog yet characterized and a reversibly photochromic FP that responds to UV and blue light. Beyond green emitters, Aequorea species express purple- and blue-pigmented chromoproteins (CPs) with absorbances ranging from green to far-red, including 2 that are photoconvertible. X-ray crystallography revealed that Aequorea CPs contain a chemically novel chromophore with an unexpected crosslink to the main polypeptide chain. Because of the unique attributes of several of these newly discovered FPs, we expect that Aequorea will, once again, give rise to an entirely new generation of useful probes for bioimaging and biosensing.
Original languageEnglish
Article numbere3000936
Number of pages22
JournalPLoS Biology
Volume18
Issue number11
DOIs
Publication statusPublished - 2020

Open Access - Access Right Statement

© 2020 Lambert et al. This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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