Allophycocyanin A is a carbon dioxide receptor in the cyanobacterial phycobilisome.
Allophycocyanin A is a carbon dioxide receptor in the cyanobacterial phycobilisome.
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DOI:
10.1038/s41467-022-32925-6
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发表时间:
2022-09-08
影响因子:
16.6
通讯作者:
中科院分区:
文献类型:
--
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Light harvesting is fundamental for production of ATP and reducing equivalents for CO2 fixation during photosynthesis. However, electronic energy transfer (EET) through a photosystem can harm the photosynthetic apparatus when not balanced with CO2. Here, we show that CO2 binding to the light-harvesting complex modulates EET in photosynthetic cyanobacteria. More specifically, CO2 binding to the allophycocyanin alpha subunit of the light-harvesting complex regulates EET and its fluorescence quantum yield in the cyanobacterium Synechocystis sp. PCC 6803. CO2 binding decreases the inter-chromophore distance in the allophycocyanin trimer. The result is enhanced EET in vitro and in live cells. Our work identifies a direct target for CO2 in the cyanobacterial light-harvesting apparatus and provides insights into photosynthesis regulation. The transfer of electronic energy through a photosystem can harm the photosynthetic apparatus when not balanced with CO2 fixation. Here, the authors show that CO2 modulates electronic energy transfer in cyanobacteria by binding to and enhancing the activity of the light-harvesting complex.
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影响因子:
2.8
作者:
BRYANT, DA;GUGLIELMI, G;COHENBAZIRE, G
通讯作者:
COHENBAZIRE, G
影响因子:
--
作者:
Edington, MD;Riter, RE;Beck, WF
通讯作者:
Beck, WF
影响因子:
7.4
作者:
PALMQVIST, K;SUNDBLAD, LG;SAMUELSSON, G
通讯作者:
SAMUELSSON, G
影响因子:
16.6
作者:
Linthwaite VL;Janus JM;Brown AP;Wong-Pascua D;O'Donoghue AC;Porter A;Treumann A;Hodgson DRW;Cann MJ
通讯作者:
Cann MJ
影响因子:
3.7
作者:
Ihnken, Sven;Kromkamp, Jacco C.;Silsbe, Greg M.
通讯作者:
Silsbe, Greg M.