Comparative Study
doi: 10.1093/genetics/113.2.469.
Maize mitochondrial plasmid S-1 sequences share homology with chloroplast gene psbA
- PMID: 3013725
- PMCID: PMC1202850
- DOI: 10.1093/genetics/113.2.469
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Comparative Study
Maize mitochondrial plasmid S-1 sequences share homology with chloroplast gene psbA
Genetics.
1986 Jun.
Abstract
The linear, 6397-base pair (bp), mitochondrial S-1 DNA molecule from maize contains a 420-bp segment that is homologous with the chloroplast gene (psbA) that codes for the quinone binding protein of photosystem II. This is the first report of a chloroplast sequence in a naturally occurring viral-like or plasmid DNA. The complete sequence of the S-1 chloroplast segment has been compared with homologous regions of six different chloroplast genes. The S-1 segment has diverged from the other genes both by length mutation and base substitution. Several of the length mutations are exact adjacent tandem duplications of 4 and 5 bp similar to "footprints" left after excision of transposable elements in maize nuclear DNA.
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