Species of the family Echeneidae are renowned for their capacity to adhere to various hosts using a sucking disc. This study aimed to examine the mitochondrial genome characteristics of three fish species (, , and ) within the family Echeneidae and determine their phylogenetic relationships. The findings revealed that the mitochondrial genome lengths of the three species were 16,611 bp, 16,648 bp, and 16,623 bp, respectively, containing 13 protein-coding genes (PCGs), 22 transfer RNA genes (tRNAs), two ribosomal RNA genes (rRNAs), and a D-loop region. Most PCGs utilized ATG as the initiation codon, while only used the GTG as the initiation codon. Additionally, seven genes employed incomplete termination codons (T and TA). The majority of PCGs in the three species displayed negative AT-skew and GC-skew values, with the GC-skew amplitude being greater than the AT-skew. The Ka/Ks ratios of the 13 PCGs did not exceed 1, demonstrating these species had been subjected to purification selection. Furthermore, only (GCT) lacked the D arm, while other tRNAs exhibited a typical cloverleaf secondary structure. Bayesian inference (BI) and maximum likelihood (ML) methods were utilized to construct a phylogenetic tree of the three species based on the 13 PCGs. was identified as a distinct group, while and were classified as sister taxa. This study contributes to the mitochondrial genome database of the family Echeneidae and provides a solid foundation for further systematic classification research in this fish group.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.3390/ani15010081 | DOI Listing |
Environ Microbiol
January 2025
Division of Infectious Diseases, Department of Medicine, and Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada.
The Canadian province of Alberta contains substantial oilsands reservoirs, consisting of bitumen, clay and sand. Extracting oil involves separating bitumen from inorganic particles using hot water and chemical diluents, resulting in liquid tailings waste with ecotoxicologically significant compounds. Ongoing efforts aim to reclaim tailings-affected areas, with protist colonisation serving as one assessment method of reclamation progress.
View Article and Find Full Text PDFInt J Mol Sci
January 2025
State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing 100071, China.
RAD52 plays crucial roles in several aspects of mammalian cells, including DNA double-strand breaks repair, viral infection, cancer development, and antibody class switching. To comprehensively elucidate the role of RAD52 in maintaining genome stability and uncover additional functions of RAD52 in mammals, we performed the transcriptomics and proteomics analysis of the liver of knockout mice. Transcriptomics analysis reveals overexpression of mitochondrial genes in the liver of knockout (RAD52KO) mice.
View Article and Find Full Text PDFDiagnostics (Basel)
December 2024
UPMC Eye Centre and Choroidal Analysis and Research (CAR) Lab, University of Pittsburgh, Pittsburgh, PA 15213, USA.
: Inherited retinal diseases (IRDs) are a genetically complex group of disorders, usually resulting in progressive vision loss due to retinal degeneration. Traditional imaging methods help in structural assessments, but limitations exist in early functional cellular-level detection that are crucial for guiding new therapies. : This review includes a systematic search of PubMed and Google Scholar for studies on advanced imaging techniques for IRDs.
View Article and Find Full Text PDFAnimals (Basel)
January 2025
Fisheries College, Zhejiang Ocean University, Zhoushan 316022, China.
Animals (Basel)
December 2024
College of Animal Science and Technology, Shihezi University, Shihezi 832000, China.
Early embryonic development relies on intricately regulated gene expression, and miRNAs influence zygotic genome activation (ZGA), cleavage, and cell fate determination through post-transcriptional regulatory mechanisms. miR-192 is expressed in early pig embryos and participates in various reproductive processes. However, its role in pre-implantation pig embryo development remains poorly understood.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!