Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 13, Issue 24, Pages 5683-5691Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.2c01019
Keywords
-
Categories
Funding
- Leverhulme Trust [RPG-2020-144]
- China Scholarship Council Ph.D. studentship [202006360048]
Ask authors/readers for more resources
The study reveals pseudothylakoid characteristics in artificial LHCII membranes, mimicking natural plant membranes. High densities of LHCII cause liposome stacking and the appearance of an unexpected emission peak similar to photosystem I emission. These findings have significant implications for interpreting the spectroscopic and physiological properties of photosynthetic membranes.
The major photosystem II light-harvesting antenna (LHCII) is the most abundant membrane protein in nature and plays an indispensable role in light harvesting and photoprotection in the plant thylakoid. Here, we show that pseudothylakoid characteristics can be observed in artificial LHCII membranes. In our proteoliposomal system, at high LHCII densities, the liposomes become stacked, mimicking the in vivo thylakoid grana membranes. Furthermore, an unexpected, unstructured emission peak at similar to 730 nm appears, similar in appearance to photosystem I emission, but with a clear excimeric character that has never been previously reported. These states correlate with the increasing density of LHCII in the membrane and a decrease in its average fluorescence lifetime. The appearance of these low-energy states can also occur in natural plant membrane structures, which has unique consequences for the interpretation of the spectroscopic and physiological properties of the photosynthetic membrane.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available