Unraveling Primary Energy Conversion Dynamics in Intact Cells of Gemmatimonas groenlandica
Abstract
Photosynthetic bacteria have evolved specialized light-harvesting structures to efficiently capture sunlight. Here, we investigate the ultrafast dynamics in intact cells of Gemmatimonas groenlandica, featuring unique double-ring LHh-LH1 photosynthetic complexes containing bacteriochlorophyll a. Two-dimensional electronic spectroscopy with lock-in detection allows us to directly observe primary energy-conversion processes, from excitation-energy transfer within the antenna system to the formation of a charge-separated state in the reaction center, taking place on 50 ps time scale. Through comparison with Rhodospirillum rubrum, which lacks the outer antenna ring, we use a combination of global analysis and nodal/center line slope analyses to resolve LHh-LH1 excitation energy transfer which occurs on a ~1-2 ps timescale in Gemmatimonas groenlandica.
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BibTeX
@misc{luttig2026unraveling,
title = {{Unraveling Primary Energy Conversion Dynamics in Intact Cells of Gemmatimonas groenlandica}},
author = {Julian Lüttig and Ajeet Kumar and Maurice Schenker and Alastair T. Gardiner and Michal Koblížek and Donatas Zigmantas and Jennifer P. Ogilvie},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.06602},
eprint = {2611.06602},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.06602},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Unraveling Primary Energy Conversion Dynamics in Intact Cells of Gemmatimonas groenlandica
AU - Julian Lüttig
AU - Ajeet Kumar
AU - Maurice Schenker
AU - Alastair T. Gardiner
AU - Michal Koblížek
AU - Donatas Zigmantas
AU - Jennifer P. Ogilvie
PY - 2026
DA - 2026/11/04
PB - arXiv
DO - 10.48550/arxiv.2611.06602
UR - https://arxiv.org/abs/2611.06602
AB - Photosynthetic bacteria have evolved specialized light-harvesting structures to efficiently capture sunlight. Here, we investigate the ultrafast dynamics in intact cells of Gemmatimonas groenlandica, featuring unique double-ring LHh-LH1 photosynthetic complexes containing bacteriochlorophyll a. Two-dimensional electronic spectroscopy with lock-in detection allows us to directly observe primary energy-conversion processes, from excitation-energy transfer within the antenna system to the formation of a charge-separated state in the reaction center, taking place on 50 ps time scale. Through comparison with Rhodospirillum rubrum, which lacks the outer antenna ring, we use a combination of global analysis and nodal/center line slope analyses to resolve LHh-LH1 excitation energy transfer which occurs on a ~1-2 ps timescale in Gemmatimonas groenlandica.
ER -