Linked Life Data

1663558

Source:http://linkedlifedata.com/resource/pubmed/id/1663558

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1992-2-28
pubmed:abstractText
It is proposed that the energy-transducing system of the first cellular organism and its precursor was fueled by the oxidation of hydrogen sulfide and ferric sulfide to iron pyrites and two [H+] on the outside surface of a vesicle (the cell membrane), with the concomitant reduction of CO or CO2 on the interior. The resulting proton gradient across the cell membrane provides a proton-motive force, so that a variety of kinds of work can be done. It is envisioned as providing a selective advantage for cells capable of harvesting this potential. The proposed reactants for these reactions are consistent with the predicted composition of the Earth's early environment. Modern-day homologs of the ancestral components of the energy-transducing system are thought to be membrane-associated ferredoxins for the extracellular redox reaction, carbon monoxide dehydrogenase for the carbon fixation reaction, and ATPase for the harvesting of the proton gradient. With a source of consumable energy, the cell could drive chemical reactions and transport events in such a way as to be exploited by Darwinian evolution.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0022-2844
pubmed:author
pubmed:issnType
Print
pubmed:volume
33
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
297-304
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1991
pubmed:articleTitle
The first cellular bioenergetic process: primitive generation of a proton-motive force.
pubmed:affiliation
Department of Biology, Indiana University, Bloomington, IN 47405, USA.
pubmed:publicationType
Journal Article