Single-molecule four-color FRET visualizes energy-transfer paths on DNA origami.
Fluorescence resonance energy transfer (FRET) represents a mechanism to transport light energy at the nanoscale, as exemplified by nature's light-harvesting complexes. Here we used DNA origami to arrange fluorophores that transport excited-state energy from an input dye to an output dye. We demonstrate that energy-transfer paths can be controlled on the single-molecule level by the presence of a "jumper" dye that directs the excited-state energy either to a red or to an IR output dye. We used single-molecule four-color FRET with alternating laser excitation to sort subpopulations and to visualize the control of energy transfer.
Angewandte Physik-Biophysik, Amalienstrasse 54, Ludwig-Maximilians-Universität, 80799 Munich, Germany.
Ingo H
IH
Stein
Christian
C
Steinhauer
Philip
P
Tinnefeld
D003116:Color; D004247:DNA / Q000737:chemistry*; D004735:Energy Transfer; D031541:Fluorescence Resonance Energy Transfer; D005456:Fluorescent Dyes / Q000737:chemistry
D005456:Fluorescent Dyes; D004247:DNA