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Is the ATPase from halobacterium saccharovorum an evolutionary relic?The ATP Synthase Complex present in the membranes of mitochondria, chloroplasts or bacteria is composed of 2 sectors: FO, an integral membrane protein consisting of 3 subunits mediating proton translocation across the membrane and F1, the catalytic component composed of 5 non-identical subunits. The apparent early origin of the ATP Synthase Complex, as implied by its ubiquitous distribution, seems inconsistent with its structural and functional complexity and raises the question if simpler versions of the ATP Synthase exist. Such an ATP Synthase has been searched for in various Archaebacteria. A purified halobacterial ATPase activity which possesses certain properties consistent with those of an ATP Synthase but which has a different subunit structure is described.
Document ID
19860017419
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Hochstein, L. I.
(NASA Ames Research Center Moffett Field, CA, United States)
Altekar, W.
(Bhabha Research Center (India) United States)
Kristjansson, H.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 12, 2013
Publication Date
May 1, 1986
Publication Information
Publication: NASA, Washington Second Symposium on Chemical Evolution and the Origin and Evolution of Life
Subject Category
Space Biology
Accession Number
86N26891
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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