Journal Article

Genomic Recombination of the Mitochondrial <i>atp6</i> Gene in <i>Arabidopsis thaliana</i> at the Protein Processing Site Creates Two Different Presequences

Joachim Marienfeld, Michael Unseld, Petra Brandt and Axel Brennicke

in DNA Research

Published on behalf of Kazusa DNA Research Institute

Volume 3, issue 5, pages 287-290
Published in print January 1996 | ISSN: 1340-2838
Published online January 1996 | e-ISSN: 1756-1663 | DOI:

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In the mitochondrial genome of the flowering plant Arabidopsis thaliana the atp6 open reading frame is located on the border of one of the repeats resulting in two copies with different presequence extensions. The two presequences of 135 and 97 amino acids respectively show no similarity to each other, while the mature protein sequences are identical. Both preproteins are most likely synthesized in Arabidopsis mitochondria from promoter elements upstream of each copy. The presence of two arrangements in the mitochondrial genome of fertile Arabidopsis plants suggests this recombination to be unrelated to a cytoplasmic male sterile phenotype. This recombination precisely at the mature protein terminus is reminiscent of the domain shuffling model in protein evolution.

Keywords: Arabidopsis; mitochondria; atp6; recombination

Journal Article.  0 words. 

Subjects: Genetics and Genomics

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