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Cyanelle DNA from Cyanophora paradoxa exists in two forms due to intramolecular recombination
Author(s) -
Bohnert Hans J.,
Löffelhardt Wolfgang
Publication year - 1982
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(82)80777-1
Subject(s) - dna , biology , recombination , genetics , microbiology and biotechnology , gene
The DNA of cyanelles which are described as endosymbiotic cyanobacteria from Cyanophora paradoxa (strain LB555UTEX) is equivalent to 127 kilobasepairs. It is characterized by two inverted repeat segments, 10 kilobasepairs in size, which are separated from each other by long single‐copy DNA segments of unequal size. This morphology of the chromosome is also found in the chloroplast DNA of most higher plants and some green algae. The cyanelle DNA exists in two forms of circular molecules which differ only in the orientation of the two single‐copy DNA segments relative to each other. This is likely due to intramolecular recombination within the inverted repeat segments.