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Pellissier-Tanon A, Chouket R, Zhang R, Lahlou A, Espagne A, Lemarchand A, Croquette V, Jullien L, Le Saux T. Resonances at Fundamental and Harmonic Frequencies for Selective Imaging of Sine-Wave Illuminated Reversibly Photoactivatable Labels. Chemphyschem 2022; 23:e202200295. [PMID: 35976176 PMCID: PMC10087976 DOI: 10.1002/cphc.202200295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 08/15/2022] [Indexed: 01/04/2023]
Abstract
We introduce HIGHLIGHT as a simple and general strategy to selectively image a reversibly photoactivatable fluorescent label associated with a given kinetics. The label is submitted to sine-wave illumination of large amplitude, which generates oscillations of its concentration and fluorescence at higher harmonic frequencies. For singularizing a label, HIGHLIGHT uses specific frequencies and mean light intensities associated with resonances of the amplitudes of concentration and fluorescence oscillations at harmonic frequencies. Several non-redundant resonant observables are simultaneously retrieved from a single experiment with phase-sensitive detection. HIGHLIGHT is used for selective imaging of four spectrally similar fluorescent proteins that had not been discriminated so far. Moreover, labels out of targeted locations can be discarded in an inhomogeneous spatial profile of illumination. HIGHLIGHT opens roads for simplified optical setups at reduced cost and easier maintenance.
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Affiliation(s)
- Agnès Pellissier-Tanon
- PASTEUR, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 24, rue Lhomond, 75005, Paris, France
| | - Raja Chouket
- PASTEUR, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 24, rue Lhomond, 75005, Paris, France
| | - Ruikang Zhang
- PASTEUR, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 24, rue Lhomond, 75005, Paris, France
| | - Aliénor Lahlou
- PASTEUR, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 24, rue Lhomond, 75005, Paris, France.,Sony Computer Science Laboratories, Paris, France
| | - Agathe Espagne
- PASTEUR, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 24, rue Lhomond, 75005, Paris, France
| | - Annie Lemarchand
- Sorbonne Université, Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Théorique de la Matière Condensée (LPTMC), 4, Place Jussieu, Case Courrier 121, 75252, Paris Cedex 05, France
| | - Vincent Croquette
- Laboratoire de Physique Statistique, Département de Physique and Département de Biologie, École normale supérieure, PSL Research University, F-, 75005, Paris, France
| | - Ludovic Jullien
- PASTEUR, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 24, rue Lhomond, 75005, Paris, France
| | - Thomas Le Saux
- PASTEUR, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 24, rue Lhomond, 75005, Paris, France
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Sun T, Li T, Yi K, Yan G, Gao X. Fluorescent Protein Variants Generated by Reassembly between Skeleton and Chromophore. ACS OMEGA 2021; 6:2925-2933. [PMID: 33553911 PMCID: PMC7860096 DOI: 10.1021/acsomega.0c05299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 01/06/2021] [Indexed: 06/12/2023]
Abstract
Fluorescent proteins (FPs) can be used as intrinsic molecular tags to track the dynamic activity in live cells. To obtain variants in an available and massive manner is always a challenge. Here, we adopted a computer-based microarray synthesis method to realize the reassembly between the chromophore and the skeleton. DNAWorks was used to segment the input FP templates into a set of overlapping oligonucleotides (20-43 mer) with a balanced annealing temperature, G + C content, and codon frequency. The constitution of the chromophore was kept in the same section by switching the divided sites during segmentation and the codon was optimized to further keep the balanced parameters. The designed oligonucleotides were synthesized on photo-programmable microfluidic arrays. Sequence analysis and the subsequent conditional induced expression of FPs revealed that oligonucleotides were highly reassembled. Spectra, photostability, and molecular size detection of randomly selected variants showed that they were distinct monomeric proteins that preserved photoactivity. Our study provides an effective means of obtaining FP variants based on a computer-designed parallel synthesis.
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Affiliation(s)
- Tingting Sun
- College
of Food Science and Pharmaceutical Engineering, Zaozhuang University, Zaozhuang, Shandong 277160, China
| | - Tianpeng Li
- College
of Civil and Architecture Engineering, Zaozhuang
University, Zaozhuang, Shandong 277160, China
- School
of the Environment, Henan Normal University, Xinxiang, Henan 453007, China
- Shandong
Key Laboratory of Water Pollution Control and Resource Reuse, Shandong University, Qingdao, Shandong 266237, China
| | - Ke Yi
- Laboratory
of Medical Genetics, Central South University, Changsha 410008, Hunan, China
| | - Guoquan Yan
- Bioengineering
Institute, Zhejiang University of Science
and Technology, Hangzhou, Zhejiang 310018, China
| | - Xiaolian Gao
- Department
of Biology and Biochemistry, University
of Houston, Houston, Texas 77004-5001, United States
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