Evolution of dictyostelids mitochondrial genome

Name: Kamonchat Prommarit

LCSH: Kasetsart University -- Theses. M.S. (Genetics) 2021

Classification :.LCCS: QK635.D53

LCSH: Kasetsart University. -- Department of Genetics -- Theses

LCSH: Dictyosteliales

LCSH: Mitochondrial DNA

Abstract: Dictyostelids, known as unicellular slime molds, generally live in soil and feed on bacteria. There are approximately 130 species of twelve genera, suggesting that they are highly diverse; however, mitochondrial genome sequences of only five species belonging to three genera were reported. This study aimed to gain insight into the evolution of Dictyostelids mitogenome; thus, genomic, transcriptomic, and draft genome data were collected from ENA and GenBank databases. The complete mitogenome of Dictyostelium intermedium and some mitochondrial genes of 12 Dictyostelids species were identified. The analysis results showed variation in size, components, segmental arrangement, and orthologous relation of hypothetical proteins among six complete mitochondrial genomes. The size's variation would likely be associated with the size of non-genic regions: introns and endonuclease genes. The component variation was mainly generated by number of tRNA and hypothetical protein genes. Two segmental arrangement patterns were found across six species with complete mitochondrial genomes and implied from a distance between genes in other 12 species with an incomplete list of mitochondrial genes. Three hypothetical protein-coding genes: oMp21, oMp04, and oMp05, were detected as potential orthologs across six complete mitochondrial genomes and 3, 10 and 4 species, respectively. The phylogenetic tree of 18S rRNA, mitochondrial rRNA, 11 protein-coding genes were generated. The results suggested that mitochondrial rRNA phylogeny corresponded well with the 18S rRNA phylogeny, while the mitochondrial protein-coding genes phylogeny was not consistent with both nuclear and mitochondrial rRNA phylogenies. These results suggested that mitochondrial protein-coding genes were not evolve along together with nuclear and mitochondrial rRNA genes. Hence, this study would be another step toward understanding the evolution of Dictyostelids mitogenome.

Kasetsart University. Office of the University Library

Address: Bangkok

Email: tdckulib@ku.ac.th

Name: Passorn Wonnapinij

Role: Thesis Advisor

Created: 2021

Modified: 2025-07-17

Issued: 2025-07-17

วิทยานิพนธ์/Thesis

application/pdf

URL: https://www.lib.ku.ac.th/KUthesis/2564/kamonchat-pro-all.pdf

CallNumber: QK635.D53 .K36

eng

DegreeName: Master of Science

Level: Master's Degree

Descipline: Genetics

Grantor: Kasetsart University

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