Energizing the plasmalemma of marine photosynthetic organisms: The role of primary active transport

Raven, JA; Beardall, J

Energizing the plasmalemma of marine photosynthetic organisms: The role of primary active transport

Raven, JA Beardall, J

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Publisher:: Cambridge University Press (CUP)
Publication Type:: Journal Article
Citation:: Journal of the Marine Biological Association of the United Kingdom, 2020, 100, (3), pp. 333-346
Issue Date:: 2020-05-01

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Field	Value	Language
dc.contributor.author	Raven, JA
dc.contributor.author	Beardall, J
dc.date.accessioned	2021-05-25T00:08:36Z
dc.date.available	2021-05-25T00:08:36Z
dc.date.issued	2020-05-01
dc.identifier.citation	Journal of the Marine Biological Association of the United Kingdom, 2020, 100, (3), pp. 333-346
dc.identifier.issn	0025-3154
dc.identifier.issn	1469-7769
dc.identifier.uri	http://hdl.handle.net/10453/149185
dc.description.abstract	Generation of ion electrochemical potential differences by primary active transport can involve energy inputs from light, from exergonic redox reactions and from exergonic ATP hydrolysis. These electrochemical potential differences are important for homoeostasis, for signalling, and for energizing nutrient influx. The three main ions involved are H , Na (efflux) and Cl (influx). In prokaryotes, fluxes of all three of these ions are energized by ion-pumping rhodopsins, with one archaeal rhodopsin pumping H into the cells; among eukaryotes there is also an H influx rhodopsin in Acetabularia and (probably) H efflux in diatoms. Bacteriochlorophyll-based photoreactions export H from the cytosol in some anoxygenic photosynthetic bacteria, but chlorophyll-based photoreactions in marine cyanobacteria do not lead to export of H . Exergonic redox reactions export H and Na in photosynthetic bacteria, and possibly H in eukaryotic algae. P-type H -and/or Na -ATPases occur in almost all of the photosynthetic marine organisms examined. P-type H -efflux ATPases occur in charophycean marine algae and flowering plants whereas P-type Na -ATPases predominate in other marine green algae and non-green algae, possibly with H -ATPases in some cases. An F-type Cl -ATPase is known to occur in Acetabularia. Some assignments, on the basis of genomic evidence, of P-type ATPases to H or Na as the pumped ion are inconclusive. + + - + + + + + + + + + + + + + - + +
dc.language	en
dc.publisher	Cambridge University Press (CUP)
dc.relation.ispartof	Journal of the Marine Biological Association of the United Kingdom
dc.relation.isbasedon	10.1017/S0025315420000211
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0602 Ecology, 0607 Plant Biology, 0608 Zoology
dc.subject.classification	Marine Biology & Hydrobiology
dc.title	Energizing the plasmalemma of marine photosynthetic organisms: The role of primary active transport
dc.type	Journal Article
utslib.citation.volume	100
utslib.for	0602 Ecology
utslib.for	0607 Plant Biology
utslib.for	0608 Zoology
utslib.for	0602 Ecology
utslib.for	0607 Plant Biology
utslib.for	0608 Zoology
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
utslib.copyright.status	closed_access	*
dc.date.updated	2021-05-25T00:08:35Z
pubs.issue	3
pubs.publication-status	Published
pubs.volume	100
utslib.citation.issue	3

Abstract:

Generation of ion electrochemical potential differences by primary active transport can involve energy inputs from light, from exergonic redox reactions and from exergonic ATP hydrolysis. These electrochemical potential differences are important for homoeostasis, for signalling, and for energizing nutrient influx. The three main ions involved are H , Na (efflux) and Cl (influx). In prokaryotes, fluxes of all three of these ions are energized by ion-pumping rhodopsins, with one archaeal rhodopsin pumping H into the cells; among eukaryotes there is also an H influx rhodopsin in Acetabularia and (probably) H efflux in diatoms. Bacteriochlorophyll-based photoreactions export H from the cytosol in some anoxygenic photosynthetic bacteria, but chlorophyll-based photoreactions in marine cyanobacteria do not lead to export of H . Exergonic redox reactions export H and Na in photosynthetic bacteria, and possibly H in eukaryotic algae. P-type H -and/or Na -ATPases occur in almost all of the photosynthetic marine organisms examined. P-type H -efflux ATPases occur in charophycean marine algae and flowering plants whereas P-type Na -ATPases predominate in other marine green algae and non-green algae, possibly with H -ATPases in some cases. An F-type Cl -ATPase is known to occur in Acetabularia. Some assignments, on the basis of genomic evidence, of P-type ATPases to H or Na as the pumped ion are inconclusive. + + - + + + + + + + + + + + + + - + +

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http://hdl.handle.net/10453/149185