ArticleCurrent genetics2010
Evolution of linear mitochondrial DNA in three known lineages of Polytomella.
Article in Current genetics, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.
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Who cites it
22 citing papers in PubMed, 51 citations in OpenAlex.
- Mitochondrial super complexes in the colorless chlorophycean alga Polytomella parva.Journal of bioenergetics and biomembranes · 2026Article
- Altered Mitochondrial Respiration Is Associated With Loss of Nuclear-Encoded OXPHOS Genes in Parasitic Broomrapes.Ecology and evolution · 2025Article
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- How to build a ribosome from RNA fragments in Chlamydomonas mitochondria.Nature communications · 2021Article
- Organelle Comparative Genome Analysis Reveals Novel Alloplasmic Male Sterility withInternational journal of molecular sciences · 2021Article
- Mitochondrial Genomic Landscape: A Portrait of the Mitochondrial Genome 40 Years after the First Complete Sequence.Life (Basel, Switzerland) · 2021Article
- Reductive evolution of chloroplasts in non-photosynthetic plants, algae and protists.Current genetics · 2018Review
- Keeping it complicated: Mitochondrial genome plasticity across diplonemids.Scientific reports · 2017Article
- Complete mitochondrial genome ofMitochondrial DNA. Part B, Resources · 2016Article
- Complete mitochondrial genome ofMitochondrial DNA. Part B, Resources · 2016Article
- Mitochondrial and plastid genome architecture: Reoccurring themes, but significant differences at the extremes.Proceedings of the National Academy of Sciences of the United States of America · 2015Article
- Massive and widespread organelle genomic expansion in the green algal genus Dunaliella.Genome biology and evolution · 2015Article
- Gene arrangement convergence, diverse intron content, and genetic code modifications in mitochondrial genomes of sphaeropleales (chlorophyta).Genome biology and evolution · 2014Article
- A plastid without a genome: evidence from the nonphotosynthetic green algal genus Polytomella.Plant physiology · 2014Article
- Inverted repeats and genome architecture conversions of terrestrial isopods mitochondrial DNA.Journal of molecular evolution · 2013Article
- Article
- Palindromic genes in the linear mitochondrial genome of the nonphotosynthetic green alga Polytomella magna.Genome biology and evolution · 2013Article
- Gene conversion shapes linear mitochondrial genome architecture.Genome biology and evolution · 2013Article
- Evidence against equimolarity of large repeat arrangements and a predominant master circle structure of the mitochondrial genome from a monkeyflower (Mimulus guttatus) lineage with cryptic CMS.Genome biology and evolution · 2012Article
- Updating our view of organelle genome nucleotide landscape.Frontiers in genetics · 2012Article
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Although DNA sequences of linear mitochondrial genomes are available for a wide variety of species, sequence and conformational data from the extreme ends of these molecules (i.e., the telomeres) are limited. Data on the telomeres is important because it can provide insights into how linear genomes overcome the end-replication problem. This study explores the evolution of linear mitochondrial DNAs (mtDNAs) in the green-algal genus Polytomella (Chlorophyceae, Chlorophyta), the members of which are non-photosynthetic. Earlier works analyzed the linear and linear-fragmented mitochondrial genomes of Polytomella capuana and Polytomella parva. Here we present the mtDNA sequence for Polytomella strain SAG 63-10 [also known as Polytomella piriformis (Pringsheim 1963)], which is the only known representative of a mostly unexplored Polytomella lineage. We show that the P. piriformis mtDNA is made up of two linear fragments of 13 and 3 kb. The telomeric sequences of the large and small fragments are terminally inverted, and appear to end in vitro with either closed (hairpin-loop) or open (nicked-loop) structures as also shown here for P. parva and shown earlier for P. capuana. The structure of the P. piriformis mtDNA is more similar to that of P. parva, which is also fragmented, than to that of P. capuana, which is contained in a single chromosome. Phylogenetic analyses reveal high substitution rates in the mtDNA of all three Polytomella species relative to other chlamydomonadalean algae. These elevated rates could be the result of a greater number of vegetative cell divisions and/or small population sizes in Polytomella species as compared with other chlamydomonadalean algae.
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