Deep Origin of Plastid/Parasite ATP/ADP Translocases |
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Authors: | Haleh Amiri Olof Karlberg Siv GE Andersson |
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Institution: | (1) , Uppsala University, Uppsala, Sweden, |
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Abstract: | Abstract
Membrane proteins that transport ATP and ADP have been identified in mitochondria, plastids, and obligate intracellular parasites.
The mitochondrial ATP/ADP transporters are derived from a broad-specificity transport family of eukaryotic origin, whereas
the origin of the plastid/parasite ATP/ADP translocase is more elusive. Here we present the sequences of five genes coding
for ATP/ADP translocases from four species of Rickettsia. The results are consistent with an early duplication and divergence of the five ATP/ADP translocases within the rickettsial
lineage. A comparison of the phylogenetic depths of the mitochondrial and the plastid/parasite ATP/ADP translocases indicates
a deep origin for both transporters. The results provide no evidence for a recent acquisition of the ATP/ADP transporters
in Rickettsia via horizontal gene transfer, as previously suggested. A possible function of the two types of ATP/ADP translocases was to
allow switches between glycolysis and aerobic respiration in the early eukaryotic cell and its endosymbiont. |
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Keywords: | ATP/ADP transporters Chlamydia Glycolysis Horizontal transfer Mitochondria Plastids Respiration Rickettsia |
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