cox3
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cox3 -cytochrome c oxidase subunit 3
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The complete maternal mitochondrial genome of rare Chinese freshwater mussel Lepidodesma languilati (Bivalvia: Unionidae: Unioninae).
Journal: Mitochondrial DNA. Part A, DNA mapping, sequencing, and analysis
October/15/2017
Description

Lepidodesma languilati is considered threatened because of the influence of human activities in China. The complete F-type mitochondrial genome of L. languilati was determined in this study (GenBank accession no. KT381195). It is a 15 754-bp-long circular molecule that consists of 37 genes that are typically found in other invertebrates. The overall base composition of the entire sequence is as follows: A (39.1%), T (25.7%), C (23.4%), and G (11.8%). Except for cox1 (TTG), cob (ATT), nad1 (ATT), nad6 (ATA), nad4 (TTG), and atp8 (GTG), 7 of the 13 protein-coding genes initiate with orthodox ATG start codon. All the 13 protein-coding genes have complete termination codon TAA or TAG. Phylogenetic tree indicates that L. languilati belongs to Unioninae. The newly sequenced complete mitogenome can provide basic data for comparative studies on mitochondrial genomes of Unionidae. It could also lay the important theoretical foundation for phylogenetics, population genetics, germplasm resources protection, sustainable, and reasonable utilization.

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Pubmed
Complete mitochondrial genome of the giant ramshorn snail Marisa cornuarietis (Gastropoda: Ampullariidae).
Journal: Mitochondrial DNA. Part A, DNA mapping, sequencing, and analysis
October/15/2017
Description

We report the complete mitochondrial genome (mitogenome) of the giant ramshorn snail Marisa cornuarietis, a biocontrol agent of freshwater weeds and snail vectors of schistosomes. The mitogenome is 15,923 bp in length, encoding 13 protein-coding genes, 22 transfer RNAs and 2 ribosomal RNAs. The mitogenome is A+T biased (70.0%), with 28.9% A, 41.1% T, 16.7% G, and 13.3% C. A comparison with Pomacea canaliculata, the other member in the same family (Ampullariidae) with a sequenced mitogenome, shows that the two species have an identical gene order, but their intergenic regions vary substantially in sequence length. The mitogenome data can be used to understand the population genetics of M. cornuarietis, and resolve the phylogenetic relationship of various genera in Ampullariidae.

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Pubmed
The first complete mitochondrial genome of stag beetle from China, Prosopocoilus gracilis (Coleoptera, Lucanidae).
Journal: Mitochondrial DNA. Part A, DNA mapping, sequencing, and analysis
October/15/2017
Description

The complete mitochondrial genome (mitogenome) of Prosopocoilus gracilis (Coleoptera: Lucanidae) that is endemic to Southern China is determined. The circular genome is 736 bp in length and comprises 13 protein-coding genes, 22 tRNA, 2 rRNA genes and a control region. Gene order is identical to that of the putative ancestral arrangement of insects. The nucleotide composition of heavy strand is A (36.6%), C (22.6%), T (29.5%) and G (11.3%). All protein-coding genes start with a typical ATN codon except for the gene COI that uses AAC as the start codon. tRNA-Ser (AGN) uses the anticodon UCU instead of the commonly used GCU. Both maximum likelihood and Bayesian analyses support the monophyly of Lucanidae and the sister relationship of Nigidionus and the remaining sampled genera. Two species of Prosopocoilus were not recovered as a monophyletic group.

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Complete mitochondrial genome of blackchin tilapia Sarotherodon melanotheron (Perciformes, Cichlidae).
Journal: Mitochondrial DNA
June/26/2012
Description

Blackchin tilapia, Sarotherodon melanotheron, is a highly salt-tolerant species in tilapias. In this paper, the complete mitochondrial genome of S. melanotheron was determined first. The mitogenome (16,627 bp) had the typical vertebrate mitochondrial gene arrangement, including 13 protein-coding, 22 tRNA, 2 rRNA genes, and 1 putative control region. It shared 95.1%, 93.2%, and 92.2% mitogenome sequence with Oreochromis aureus, Oreochromis niloticus, and Oreochromis mossambicus, respectively.

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Pubmed
The complete mitochondrial genome of Barbus capito (Cypriniformes, Cyprinidae).
Journal: Mitochondrial DNA
February/2/2014
Description

The mitogenome of Barbus capito was 16,603 bp long containing 1 D-loop region, 2 rRNA, 22 tRNA, and 13 protein-coding genes. Eight tRNA genes and one protein-coding gene were encoded on light strand, the others on heavy strand. The base composition and gene arrangement of B. capito mitogenome were identical to typical vertebrate.

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Pubmed
Characterization of the complete mitochondrial genome of the Grey-backed Shrike, Lanius tephronotus (Aves: Passeriformes): the first representative of the family Laniidae with a novel CAA stop codon at the end of cox2 gene.
Journal: Mitochondrial DNA
February/2/2014
Description

The complete Grey-backed Shrike mitochondrial genome has been sequenced to be 16,820 bp in length, consisting of 37 encode genes: 13 protein-coding genes, 2 ribosomal RNA genes, and 22 transfer RNA genes. In addition, a single control region was also observed. Compared with other reported Passeriformes mtgenome sequences, three bases CAA were detected at the end of Lanius tephronotus cox2 gene with the downstream adjacent base T. The first base of CAA probably occurred C to U transcript editing event resulting in a normal stop codon UAA.

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Crocodilian phylogeny inferred from twelve mitochondrial protein-coding genes, with new complete mitochondrial genomic sequences for Crocodylus acutus and Crocodylus novaeguineae.
Journal: Molecular phylogenetics and evolution
September/27/2011
Description

We report complete mitochondrial genomic sequences for Crocodylus acutus and Crocodylus novaeguineae, whose gene orders match those of other crocodilians. Phylogenetic analyses based on the sequences of 12 mitochondrial protein-coding genes support monophyly of two crocodilian taxonomic families, Alligatoridae (genera Alligator, Caiman, and Paleosuchus) and Crocodylidae (genera Crocodylus, Gavialis, Mecistops, Osteolaemus, and Tomistoma). Our results are consistent with monophyly of all crocodilian genera. Within Alligatoridae, genus Alligator is the sister taxon of a clade comprising Caiman and Paleosuchus. Within Crocodylidae, the basal phylogenetic split separates a clade comprising Gavialis and Tomistoma from a clade comprising Crocodylus, Mecistops, and Osteolaemus. Mecistops and Osteolaemus form the sister taxon to Crocodylus. Within Crocodylus, we sampled five Indopacific species, whose phylogenetic ordering is ((C. mindorensis, C. novaeguineae), (C. porosus, (C. siamensis, C. palustris))). The African species C. niloticus and New World species C. acutus form the sister taxon to the Indopacific species, although our sampling lacks three other New World species and an Australian species of Crocodylus.

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Pubmed
Characterization of the complete mitochondrial genome of flower-breeding Drosophila incompta (Diptera, Drosophilidae).
Journal: Genetica
June/24/2015
Description

Drosophila incompta belongs to the flavopilosa group of Drosophila, and has a restricted ecology, being adapted to flowers of Cestrum as feeding and oviposition sites. We sequenced, assembled, and characterized the complete mitochondrial genome (mtDNA) of D. incompta. In addition, we performed phylogenomic and polymorphism analyses to assess evolutionary diversification of this species. Our results suggest that this genome is syntenic with the other published mtDNA of Drosophila. This molecule contains 15,641 bp and encompasses two rRNA, 22 tRNA and 13 protein-coding genes. Regarding nucleotide composition, we found a high A-T bias (76.6 %). The recovered phylogenies indicate D. incompta in the virilis-repleta radiation, as sister to the virilis or repleta groups. The most interesting result is the high degree of polymorphism found throughout the D. incompta mitogenome, revealing pronounced intrapopulational variation. Furthermore, intraspecific nucleotide diversity levels varied between different regions of the genome, thus allowing the use of different mitochondrial molecular markers for analysis of population structure of this species.

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Pubmed
Complete mitochondrial genome of the Sharpnose stingray Himantura gerrardi (Myliobatiformes: Dasyatidae).
Journal: Mitochondrial DNA. Part A, DNA mapping, sequencing, and analysis
October/15/2017
Description

In this study, we presented the complete mitochondrial genome of the Sharpnose stingray Himantura gerrardi for the first time, which was 17,685 bp in length and contained 13 protein-coding genes, 2 rRNA genes, 22 tRNA genes and a putative control region. The overall nucleotide composition was 30.1% A, 27.5% C, 14.5% G and 28.0% T. A total of 22 bp overlaps and 83 bp short intergenic spaces were found in the mitogenome. Two start codons (ATG and GTG) and two stop codons (TAG and TAA/T) were used in the protein-coding genes. The origin of L-strand replication (OL) sequence formed a hairpin structure between the tRNA-Asn and tRNA-Cys genes. The termination associated sequence (TAS) formed a hairpin structure near the tRNA-Pro in the control region.

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Complete mitochondrial DNA sequences of the frigate tuna Auxis thazard and the bullet tuna Auxis rochei.
Journal: DNA sequence : the journal of DNA sequencing and mapping
September/10/2008
Description

The complete mitochondrial DNA sequence of the frigate tuna Auxis thazard and two divergent mitotypes (Mitotype I and Mitotype II) of the bullet tuna Auxis rochei have been determined. The total length of the mitogenomes was 16,506, 16,501 and 16,503 bp, respectively. All mitogenomes had a gene content (13 protein-coding, 2 rRNAs and 22 tRNAs) and organization similar to those observed in most other vertebrates. The major non-coding region (control region) ranged between 843 and 847 bp in length, and showed the typical conserved blocks. Phylogenetic analyses revealed a monophyletic origin of Auxis with respect to other tuna fish. Molecular data here presented provide a useful tool for evolutionary as well as population genetic studies.

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