Abstract
Sorghum mitochondrialatp6 occurs as one copy in the line Tx398 and as two copies in IS1112C. In IS1112C a repeated sequence diverged within theatp6 open reading frames. The two open reading frames (1137 bp,atp6-1; 1002 bp,atp6-2) share an identical conserved region of 756 bp but are flanked 5′ by divergent extensions of 246 (atp6-1) or 381 bp (atp6-2). Tx398 carried onlyatp6-2. The breakpoint of the repeated sequence of the conserved core region corresponds to the amino acid sequence Ser-Pro-Leu-Asp, which is the amino terminus of the proteolytically processed yeast ATP6. The 5′ extensions ofatp6-1 andatp6-2 were similar to those of rice and maize, respectively. Each open reading is transcribed, however nuclear background influenced transcriptional patterns ofatp6-2 in IS1112C.
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Mullen, J.A., Pring, D.R., Kempken, F. et al. Sorghum mitochondrialatp6: divergent amino extensions to a conserved core polypeptide. Plant Mol Biol 20, 71–79 (1992). https://doi.org/10.1007/BF00029150
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DOI: https://doi.org/10.1007/BF00029150