Linear and “Lasso-Like” Structures of Mitochondrial Dna From Pennisetum Typhoides

Kim, Byung-Dong; Lee, Kil-Jae; DeBusk, A. G.

doi:10.1016/b978-0-12-221480-6.50049-9

Cited by 2 publications

(2 citation statements)

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“…Some DNA molecules, like the mitochondrial genome of S. cerevisiae (32) and the chloroplast chromosomes (22), are reported to replicate via different types of intermediates. However, sigma-like molecules were also found in mtDNA preparations of other plant species (20,38), supporting the view that rolling-circle replication may be a common phenomenon in mitochondria of higher plants.…”

Section: Discussionsupporting

confidence: 50%

Rolling-Circle Replication of Mitochondrial DNA in the Higher Plant Chenopodium album (L.)

Backert

Dörfel

Lurz

et al. 1996

Molecular and Cellular Biology

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The mitochondrial genomes of higher plants are larger and more complex than those of all other groups of organisms. We have studied the in vivo replication of chromosomal and plasmid mitochondrial DNAs prepared from a suspension culture and whole plants of the dicotyledonous higher plant Chenopodium album (L.). Electron microscopic studies revealed sigma-shaped, linear, and open circular molecules (subgenomic circles) of variable size as well as a minicircular plasmid of 1.3 kb (mp1). The distribution of single-stranded mitochondrial DNA in the sigma structures and the detection of entirely single-stranded molecules indicate a rolling-circle type of replication of plasmid mp1 and subgenomic circles. About half of the sigma-like molecules had tails exceeding the lengths of the corresponding circle, suggesting the formation of concatemers. Two replication origins (nicking sites) could be identified on mp1 by electron microscopy and by a new approach based on the mapping of restriction fragments representing the identical 5 ends of the tails of sigma-like molecules. These data provide, for the first time, evidence for a rolling-circle mode of replication in the mitochondria of higher plants.

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Section: Discussionsupporting

confidence: 50%

Rolling-Circle Replication of Mitochondrial DNA in the Higher Plant Chenopodium album (L.)

Backert

Dörfel

Lurz

et al. 1996

Molecular and Cellular Biology

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show abstract

“…The analysis of higher plant mtDNA preparations by electron microscopy reveals that the maj ority if not all of the DNA molecules observed are linear with no fixed size distributions (1)(2)(3)(4)(5). In many studies, however, a low proportion of circular DNA molecules is observed (6)(7)(8)(9)(10).…”

Section: The Circular Dna Species Of Plant Mitochondriamentioning

confidence: 99%

A review of the structure and organization of the mitochondrial genome of higher plants

Lonsdale

1984

Plant Mol Biol

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The structure, organisation and functions of the mitochondrial genome of most groups of eukaryotic organisms are known to varying degrees with the notable exception of higher plants. With the recent completion of physical mapping studies on the Brassica campestris (Chinese cabbage, turnip) and Zea mays (maize) mitochondrial genomes, many of the apparent problems of plant mitochondrial genome structure can now be answered. In this manuscript I review the literature relating to the physical observations on plant mitochondrial DNA (mtDNA) and assess the data in relation to our current understanding of mitochondrial genome structure.

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Linear and “Lasso-Like” Structures of Mitochondrial Dna From Pennisetum Typhoides

Cited by 2 publications

References 1 publication

Rolling-Circle Replication of Mitochondrial DNA in the Higher Plant Chenopodium album (L.)

Rolling-Circle Replication of Mitochondrial DNA in the Higher Plant Chenopodium album (L.)

A review of the structure and organization of the mitochondrial genome of higher plants

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