Formate-Induced Release of Carbon Dioxide/ Hydrogencarbonate from Photosystem II

Formate-Induced Release of Carbon Dioxide/ Hydrogencarbonate from Photosystem II. Shevela, D., Klimov, V., & Messinger, J. In Allen, J. F., Gantt, E., Golbeck, J. H., & Osmond, B., editors, Photosynthesis. Energy from the Sun, pages 495–498, Dordrecht, 2008. Springer Netherlands.
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Using Membrane-Inlet Mass Spectrometry (Mims) We Confirm That Injections Of High Concentrations (100 Mm Final Concentration) Of Formate Into The Psii Samples Induce A Slow Release Of Carbon Dioxide/Hydrogencarbonate (Co2/ Hco3 -) (Govindjee Et Al. 1997). The Amount Of The Released Inorganic Carbon (CI) Is Proportional Tothe Concentration Of The Bby Samples. Hydrazinepre- Treated Bby, Leading To An ̃90% Inhibition Of The Overall Oxygen Evolution Activity, Release After Formate Injection Practically The Same Amount Of CI As Non-Treated Control Samples. These Results Indicate That The Released CI Originates From The Acceptor Side Of Psii And Evidently None From The Mn4OXCa Cluster. Thus, No Evidence Was Found In This Study For Hydrogencarbonate Being Tight Ligand Of The Mn4OXCa Cluster, Which Can Be Released By Formate Injection. The Possibility Of Hco3 - Release From Psii During Degassation In The Mass Spec Cell Is Discussed.

@inproceedings{shevela_formate-induced_2008,
	address = {Dordrecht},
	title = {Formate-{Induced} {Release} of {Carbon} {Dioxide}/ {Hydrogencarbonate} from {Photosystem} {II}},
	isbn = {978-1-4020-6709-9},
	doi = {10.1007/978-1-4020-6709-9_112},
	abstract = {Using Membrane-Inlet Mass Spectrometry (Mims) We Confirm That Injections Of High Concentrations (100 Mm Final Concentration) Of Formate Into The Psii Samples Induce A Slow Release Of Carbon Dioxide/Hydrogencarbonate (Co2/ Hco3 -) (Govindjee Et Al. 1997). The Amount Of The Released Inorganic Carbon (CI) Is Proportional Tothe Concentration Of The Bby Samples. Hydrazinepre- Treated Bby, Leading To An ̃90\% Inhibition Of The Overall Oxygen Evolution Activity, Release After Formate Injection Practically The Same Amount Of CI As Non-Treated Control Samples. These Results Indicate That The Released CI Originates From The Acceptor Side Of Psii And Evidently None From The Mn4OXCa Cluster. Thus, No Evidence Was Found In This Study For Hydrogencarbonate Being Tight Ligand Of The Mn4OXCa Cluster, Which Can Be Released By Formate Injection. The Possibility Of Hco3 - Release From Psii During Degassation In The Mass Spec Cell Is Discussed.},
	language = {en},
	booktitle = {Photosynthesis. {Energy} from the {Sun}},
	publisher = {Springer Netherlands},
	author = {Shevela, Dmitriy and Klimov, Vyacheslav and Messinger, Johannes},
	editor = {Allen, John F. and Gantt, Elisabeth and Golbeck, John H. and Osmond, Barry},
	year = {2008},
	keywords = {Membrane-inlet mass spectrometry (MIMS), bicarbonate, formate, hydrogencarbonate, photosystem II (PSII)},
	pages = {495--498},
}

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