Complete sequence of the mitochondrial genome of a diatom alga Synedraacus and comparative analysis of diatom mitochondrial genomes

  title={Complete sequence of the mitochondrial genome of a diatom alga Synedraacus and comparative analysis of diatom mitochondrial genomes},
  author={Nikolai V. Ravin and Yuri Pavlovich Galachyants and Andrey V. Mardanov and Alexey V. Beletsky and Darya Petrovna Petrova and Tatyana A. Sherbakova and Yuliya R. Zakharova and Yelena V. Likhoshway and Konstantin G. Skryabin and M A Grachev},
  journal={Current Genetics},
The first two mitochondrial genomes of marine diatoms were previously reported for the centric Thalassiosira pseudonana and the raphid pennate Phaeodactylum tricornutum. As part of a genomic project, we sequenced the complete mitochondrial genome of the freshwater araphid pennate diatom Synedra acus. This 46,657 bp mtDNA encodes 2 rRNAs, 24 tRNAs, and 33 proteins. The mtDNA of S. acus contains three group II introns, two inserted into the cox1 gene and containing ORFs, and one inserted into the… 

Complete Chloroplast Genome Sequence of Freshwater Araphid Pennate Diatom Alga Synedra acus from Lake Baikal

Comparison of the genic features across diatom chloroplast genomes reveals the absence of an overlap between atpD and atpF gene coding sequences that is present in other plastid genomes of diatom origin.

Comparative analysis of the mitochondrial genomes of six newly sequenced diatoms reveals group II introns in the barcoding region of cox1

It is suggested that high rates of variability in number and position of introns, in many commonly used coding sequences, prevent these from being universally viable as barcodes for diatoms, and researchers are suggested to examine the chloroplast and/or nuclear genomes for universal barcoding markers.

Unique mitochondrial genome structure of the green algal strain YC001 (Sphaeropleales, Chlorophyta), with morphological observations

It is determined that YC001 is a species of Coelastrella on the basis of molecular phylogenetic analyses and microscopic observations, and a unique feature of this mitogenome is the presence of three different types of inverted repeats between trnL and trnI and between nad4 and cox1.

The complete chloroplast and mitochondrial genomes of the diatom Nitzschia palea (Bacillariophyceae) demonstrate high sequence similarity to the endosymbiont organelles of the dinotom Durinskia baltica

Genome‐based phylogenies demonstrated that D. baltica is more similar to N. palea than any other diatom sequence currently available and provide the genome sequences of two organelles for a widespread diatom and show they are very similar to those of Durinskia bALTica's endosymbiont.

Extensive chloroplast genome rearrangement amongst three closely related Halamphora spp. (Bacillariophyceae), and evidence for rapid evolution as compared to land plants

A comparison of Halamphora chloroplast genomes to those of land plants indicates diatom chloroplow genomes within this genus may be evolving at least ~4–7 times faster than those ofLand plants.

An intronic open reading frame was released from one of group II introns in the mitochondrial genome of the haptophyte Chrysochromulina sp. NIES-1333

It is proposed that a “free-standing,” IEP-like protein, which is not encoded within any introns in the Chrysochromulina mt genome, is involved in the splicing of the first cox1 intron that lacks any open reading frames.

Recurrent Loss, Horizontal Transfer, and the Obscure Origins of Mitochondrial Introns in Diatoms (Bacillariophyta)

High rates of intron loss suggest that the origins of many diatom mitochondrial introns are likely to remain unclear, and some of these histories may become clearer as more genomes are sampled.

Repeat region absent in mitochondrial genome of tube-dwelling diatom Berkeleya fennica (Naviculales, Bacillariophyceae)

A new mitogenome will provide useful information for mitochondrial genome diversity and evolution of the diatoms, and Gene content and synteny of B. fennica are very similar to Phaeodactylum tricoruntum.



Complete Sequence and Analysis of the Mitochondrial Genome of Hemiselmis andersenii CCMP644 (Cryptophyceae)

The H. andersenii mtDNA shares a number of features in common with the genome of the cryptophyte Rhodomonas salina, including general architecture, gene content, and the presence of a large repeat-rich intergenic region, but it appears unable to produce a functional tRNA.

The Phaeodactylum genome reveals the evolutionary history of diatom genomes

Analysis of molecular divergence compared with yeasts and metazoans reveals rapid rates of gene diversification in diatoms, and documents the presence of hundreds of genes from bacteria, likely to provide novel possibilities for metabolite management and for perception of environmental signals.

The Rhodomonas salina mitochondrial genome: bacteria-like operons, compact gene arrangement and complex repeat region

Evidence that the large repeat region is involved in replication and transcription initiation, predict a promoter motif that occurs in three locations and discuss two likely scenarios of how this highly structured repeat region might have evolved are provided.

Phylogenetic analysis of diatom coxI genes and implications of a fluctuating GC content on mitochondrial genetic code evolution

A phylogenetic analysis of these coxI sequences showed that the diatoms (Bacillariophyta) formed a well-supported monophyletic group and there was no apparent relationship between the nucleotide third-position GC content of mtDNA and the presence of a deviant genetic code.

The genome sequence of Rickettsia prowazekii and the origin of mitochondria

The complete genome sequence of the obligate intracellular parasite Rickettsia prowazekii, the causative agent of epidemic typhus, is described, which contains 834 protein-coding genes and is more closely related to mitochondria than is any other microbe studied so far.

Evolution of the mitochondrial genome: protist connections to animals, fungi and plants.

Mitochondrial Genome of a Tertiary Endosymbiont Retains Genes for Electron Transport Proteins

The first mitochondrial genes from this system are described, suggesting the endosymbiont mitochondria not only retain a genome, but also express their genes, and are therefore likely involved in electron transport.

On the origin of mitochondria: a genomics perspective.

The strong relationship with alpha-proteobacterial genes observed for some mitochondrial genes, combined with the lack of such a relationship for others, indicates that the modern mitochondrial proteome is the product of both reductive and expansive processes.

Characterization of two circular plasmids from the marine diatomCylindrotheca fusiformis: plasmids hybridize to chloroplast and nuclear DNA

By hybridization analysis, it was showed that pCfl and pCf2 share regions of similarity, but not identity, and both plasmids hybridize with chloroplast DNA, and p cf2 also hybridizes with nuclear DNA.

Evolution of mitochondrial gene content: gene loss and transfer to the nucleus.