Circularly polarised luminescence laser scanning confocal microscopy to study live cell chiral molecular interactions

Patrycja Stachelek, Lewis MacKenzie, David Parker and Robert Pal ()
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Patrycja Stachelek: Durham University
Lewis MacKenzie: Durham University
David Parker: Durham University
Robert Pal: Durham University

Nature Communications, 2022, vol. 13, issue 1, 1-8

Abstract: Abstract The molecular machinery of life is founded on chiral building blocks, but no experimental technique is currently available to distinguish or monitor chiral systems in live cell bio-imaging studies. Luminescent chiral molecules encode a unique optical fingerprint within emitted circularly polarized light (CPL) carrying information about the molecular environment, conformation, and binding state. Here, we present a CPL Laser Scanning Confocal Microscope (CPL-LSCM) capable of simultaneous chiroptical contrast based live-cell imaging of endogenous and engineered CPL-active cellular probes. Further, we demonstrate that CPL-active probes can be activated using two-photon excitation, with complete CPL spectrum recovery. The combination of these two milestone results empowers the multidisciplinary imaging community, allowing the study of chiral interactions on a sub-cellular level in a new (chiral) light.

Date: 2022
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DOI: 10.1038/s41467-022-28220-z

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