Labelling Bacterial Nanocages with Photo-switchable Fluorophores

Rindia Maharani Putri, Wilfried Fredy, Jeroen Johannes Lambertus Maria Cornelissen, M.S.T. Koay, Nathalie Hélène Katsonis

Research output: Contribution to journalArticleAcademicpeer-review

12 Citations (Scopus)
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Abstract

The robustness and biocompatibility of bacterial nanocages holds promise for bio-nanotechnologies. The propensity of these nano-carriers to penetrate cells has been demonstrated, which calls for the development of tracking strategies, both in vitro and in vivo. Here, we label bacterial nanocages with photo-switchable fluorophores, to facilitate their imaging by super-resolution microscopy. We demonstrate the functionalization of the encapsulin from Brevibacterium linens with a spiropyran, which is not fluorescent, by covalent attachment to the amine residues at the outer encapsulin shell. Upon alternating irradiation with ultraviolet and visible light, the spiropyran switches forth and back to its fluorescent merocyanine photo-isomer and thus the fluorescence can be switched on and off, reversibly. We also show that the bacterial compartments preserve their structural integrity upon covalent modification and over at least five irradiation cycles.
Original languageEnglish
Pages (from-to)1815-1818
Number of pages3
JournalChemPhysChem
Volume17
Issue number12
DOIs
Publication statusPublished - 2016

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Fluorophores
Labeling
marking
linen
Irradiation
Linen
irradiation
biocompatibility
Structural integrity
compartments
nanotechnology
Biocompatibility
Nanotechnology
Isomers
ultraviolet radiation
integrity
Amines
attachment
Labels
amines

Keywords

  • METIS-320623
  • IR-103884

Cite this

Putri, Rindia Maharani ; Fredy, Wilfried ; Cornelissen, Jeroen Johannes Lambertus Maria ; Koay, M.S.T. ; Katsonis, Nathalie Hélène. / Labelling Bacterial Nanocages with Photo-switchable Fluorophores. In: ChemPhysChem. 2016 ; Vol. 17, No. 12. pp. 1815-1818.
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abstract = "The robustness and biocompatibility of bacterial nanocages holds promise for bio-nanotechnologies. The propensity of these nano-carriers to penetrate cells has been demonstrated, which calls for the development of tracking strategies, both in vitro and in vivo. Here, we label bacterial nanocages with photo-switchable fluorophores, to facilitate their imaging by super-resolution microscopy. We demonstrate the functionalization of the encapsulin from Brevibacterium linens with a spiropyran, which is not fluorescent, by covalent attachment to the amine residues at the outer encapsulin shell. Upon alternating irradiation with ultraviolet and visible light, the spiropyran switches forth and back to its fluorescent merocyanine photo-isomer and thus the fluorescence can be switched on and off, reversibly. We also show that the bacterial compartments preserve their structural integrity upon covalent modification and over at least five irradiation cycles.",
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Labelling Bacterial Nanocages with Photo-switchable Fluorophores. / Putri, Rindia Maharani; Fredy, Wilfried; Cornelissen, Jeroen Johannes Lambertus Maria; Koay, M.S.T.; Katsonis, Nathalie Hélène.

In: ChemPhysChem, Vol. 17, No. 12, 2016, p. 1815-1818.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Labelling Bacterial Nanocages with Photo-switchable Fluorophores

AU - Putri, Rindia Maharani

AU - Fredy, Wilfried

AU - Cornelissen, Jeroen Johannes Lambertus Maria

AU - Koay, M.S.T.

AU - Katsonis, Nathalie Hélène

PY - 2016

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N2 - The robustness and biocompatibility of bacterial nanocages holds promise for bio-nanotechnologies. The propensity of these nano-carriers to penetrate cells has been demonstrated, which calls for the development of tracking strategies, both in vitro and in vivo. Here, we label bacterial nanocages with photo-switchable fluorophores, to facilitate their imaging by super-resolution microscopy. We demonstrate the functionalization of the encapsulin from Brevibacterium linens with a spiropyran, which is not fluorescent, by covalent attachment to the amine residues at the outer encapsulin shell. Upon alternating irradiation with ultraviolet and visible light, the spiropyran switches forth and back to its fluorescent merocyanine photo-isomer and thus the fluorescence can be switched on and off, reversibly. We also show that the bacterial compartments preserve their structural integrity upon covalent modification and over at least five irradiation cycles.

AB - The robustness and biocompatibility of bacterial nanocages holds promise for bio-nanotechnologies. The propensity of these nano-carriers to penetrate cells has been demonstrated, which calls for the development of tracking strategies, both in vitro and in vivo. Here, we label bacterial nanocages with photo-switchable fluorophores, to facilitate their imaging by super-resolution microscopy. We demonstrate the functionalization of the encapsulin from Brevibacterium linens with a spiropyran, which is not fluorescent, by covalent attachment to the amine residues at the outer encapsulin shell. Upon alternating irradiation with ultraviolet and visible light, the spiropyran switches forth and back to its fluorescent merocyanine photo-isomer and thus the fluorescence can be switched on and off, reversibly. We also show that the bacterial compartments preserve their structural integrity upon covalent modification and over at least five irradiation cycles.

KW - METIS-320623

KW - IR-103884

U2 - 10.1002/cphc.201600013

DO - 10.1002/cphc.201600013

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SP - 1815

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JF - ChemPhysChem

SN - 1439-4235

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ER -