Change search
ReferencesLink to record
Permanent link

Direct link
Links between hydrothermal environments, pyrophosphate, Na+, and early evolution
Stockholm University, Faculty of Science, Department of Geological Sciences. (Hydrothermal Organic Geochemistry)
Stockholm University, Faculty of Science, Department of Biochemistry and Biophysics.
2011 (English)In: Origins of life and evolution of the biosphere, ISSN 0169-6149, E-ISSN 1573-0875, Vol. 41, no 5, 483-493 p.Article in journal (Refereed) Published
Abstract [en]

The discovery that photosynthetic bacterial membrane-bound inorganic pyrophosphatase (PPase) catalyzed light-induced phosphorylation of orthophosphate (Pi) to pyrophosphate (PPi) and the capability of PPi to drive energy requiring dark reactions supported PPi as a possible early alternative to ATP. Like the proton-pumping ATPase, the corresponding membrane-bound PPase also is a H+-pump, and like the Na+-pumping ATPase, it can be a Na+-pump, both in archaeal and bacterial membranes. We suggest that PPi and Na+ transport preceded ATP and H+ transport in association with geochemistry of the Earth at the time of the origin and early evolution of life. Life may have started in connection with early plate tectonic processes coupled to alkaline hydrothermal activity. A hydrothermal environment in which Na+ is abundant exists in sediment-starved subduction zones, like the Mariana forearc in the W Pacific Ocean. It is considered to mimic the Archean Earth. The forearc pore fluids have a pH up to 12.6, a Na+-concentration of 0.7 mol/kg seawater. PPi could have been formed during early subduction of oceanic lithosphere by dehydration of protonated orthophosphates. A key to PPi formation in these geological environments is a low local activity of water.

Place, publisher, year, edition, pages
2011. Vol. 41, no 5, 483-493 p.
Keyword [en]
brucite, early evolution, hydrothermal systems, Mariana forearc, membrane-bound inorganic pyrophosphatase, proton pump, pyrophosphate, serpentinization, sodium pump, subduction zones
National Category
Geochemistry Biochemistry and Molecular Biology
URN: urn:nbn:se:su:diva-62946DOI: 10.1007/s11084-011-9235-4ISI: 000300367500007OAI: diva2:446000
Available from: 2011-10-05 Created: 2011-10-05 Last updated: 2012-04-12Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Holm, NilsBaltscheffsky, Herrick
By organisation
Department of Geological SciencesDepartment of Biochemistry and Biophysics
In the same journal
Origins of life and evolution of the biosphere
GeochemistryBiochemistry and Molecular Biology

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 22 hits
ReferencesLink to record
Permanent link

Direct link