Minding the Gap between Plant and Bacterial Photosynthesis within a Self-Assembling Biohybrid Photosystem

Juntai Liu, Judith Mantell, Michael R Jones*

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

11 Citations (Scopus)
100 Downloads (Pure)

Abstract

Many strategies for meeting mankind’s future energy demands through the exploitation of plentiful solar energy have been influenced by the efficient and sustainable processes of natural photosynthesis. A limitation affecting solar energy conversion based on photosynthetic proteins is the selective spectral coverage that is the consequence of their particular natural pigmentation. Here we demonstrate the bottom-up formation of semisynthetic, polychromatic photosystems in mixtures of the chlorophyll-based LHCII major light harvesting complex from the oxygenic green plant Arabidopsis thaliana, the bacteriochlorophyll-based photochemical reaction center (RC) from the anoxygenic purple bacterium Rhodobacter sphaeroides and synthetic quantum dots (QDs). Polyhistidine tag adaptation of LHCII and the RC enabled predictable self-assembly of LHCII/RC/QD nanoconjugates, the thermodynamics of which could be accurately modeled and parametrized. The tricomponent biohybrid photosystems displayed enhanced solar energy conversion via either direct chlorophyll-to-bacteriochlorophyll energy transfer or an indirect pathway enabled by the QD, with an overall energy transfer efficiency comparable to that seen in natural photosystems.
Original languageEnglish
Article number4
Pages (from-to)4536-4549
Number of pages14
JournalACS Nano
Volume14
Early online date31 Mar 2020
DOIs
Publication statusE-pub ahead of print - 31 Mar 2020

Keywords

  • biohybrid
  • self-assembly
  • quantum dots
  • photosynthesis
  • light harvesting
  • solar energy conversion

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