The abstract is read at the publisher; the summary is JClub's.
A 2.25-angstrom cryo-EM structure of Mesostigma viride PSII-LHCII-LHCP reveals a unique C2S2Mp2Lp2 architecture with an ancestral antenna module and seven carotenoids per LHCP subunit.
- Why it matters: The molecular basis of how this basal streptophyte light-harvesting system evolved toward land plants is unclear, limiting understanding of early PSII structural and pigment adaptations.
- What they did: They solved the PSII-LHCII-LHCP supercomplex by cryo-EM at 2.25 angstrom resolution and mapped conserved PSII core subunits, peripheral antenna composition, and pigment content.
- The result: The complex shows a nearly complete conserved PSII framework, an antenna with CP29 flanked by two ancestral LHCP monomers, and a 96-femtosecond ultrafast energy transfer component linked to broad blue-green absorption.
The findingWhy it mattersWhat they didThe result
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