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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Bonen, L. Lee, R. W. Gray, M. W. Boer, P. H. |
| Abstract | We have used heterologous hybridization and DNA sequence analysis to determine whether the 16-kilobase-pair (kbp) DNA from Chlamydomonas reinhardtii mitochondria is the functional equivalent of mtDNA in other eukaryotes. Restriction fragments corresponding to a continuous internal stretch spanning 75% of the 16-kbp DNA have been cloned and mapped, and regions hybridizing with probes specific for the cytochrome oxidase subunit I [CytOx I (acronym COI)] and apocytochrome b (Cyt b) genes of yeast and the mitochondrial 26S and 18S rRNA genes of wheat have been identified. Sequence analysis has verified the presence of CytOx I and the large and small subunit rRNA genes in the C. reinhardtii 16-kbp DNA. In the region of the 16-kbp DNA corresponding to exon 4 in the yeast CytOx I gene, the derived amino acid sequence is 61% and 63% identical with the CytOx I amino acid sequences of yeast and human mitochondria, respectively. Notably, tryptophan is specified by TGG rather than by TGA in this section of the C. reinhardtii CytOx I gene. A probe from the CytOx I region of the 16-kbp DNA hybridizes only with this 16-kbp DNA in Southern blots of total cellular DNA from C. reinhardtii but with a larger DNA species in the total cellular DNA of C. moewusii and C. eugametos--two species that lack a 16-kbp DNA. These observations provide evidence that C. reinhardtii 16-kbp DNA comprises at least part of the mitochondrial genome of this organism and that a homologous DNA exists in other species of Chlamydomonas. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 10 |
| Volume Number | 82 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1985-06-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Chlamydomonas Genetics DNA, Mitochondrial Electron Transport Complex IV RNA, Ribosomal Chromosome Mapping Cloning, Molecular Genes Nucleic Acid Hybridization Species Specificity Comparative Study Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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