Title page for etd-0707105-161158


[Back to Results | New Search]

URN etd-0707105-161158
Author Sheng-Tai Hsiao
Author's Email Address No Public.
Statistics This thesis had been viewed 5055 times. Download 1351 times.
Department Marine Resources
Year 2004
Semester 2
Degree Master
Type of Document
Language English
Title Genomic Analyses of the Complete Mitochondrial DNA Sequence of the Sponge, Cinachyrella australiensis (Demospongiae: Spirophorida)
Date of Defense 2005-06-14
Page Count 108
Keyword
  • Cinachyrella australiensis
  • complete mitochondrial DNA
  • Abstract Sponges (Porifera) are the most primitive multicellular animals that are highly diverse and complex associated with other organisms, microbes especially. Recently, sponges have received a lot of attention as they are a rich source of nature products with antiviral, antitumor, and antimicrobial activities. Sponges play such important roles in so many marine habitats but little is known about their diversity, biology and ecology as compared with most other animal groups. Moreover, due to limited information provided based on morphology, other method of classification is need. Mitochondrial DNA sequence may fulfill such purpose. The complete nucleotide sequence (19444 bp) of the mt genome of the Cinachyrella australiensis (Demospongiae: Spirophorida) was determined. The genome contains the two rRNA, 24 tRNA and 14 protein-coding genes. We found that poriferan mtDNAs resemble those of other animals in their compact organization, and a well-conserved animal-like gene order. However, this molecule has several unique features: the ATP 9 gene is the first found to be present in the mt genome of multicellular animals, the cytochrome c oxidase subunit I (COI) gene include a group I intron, and encode bacteria-like tRNA. The results represent that the evolution of metazoan mtDNA has been a multistep process to the reduction of tRNA and the introduction of multiple changes of the translation code.
    Advisory Committee
  • Chan-Shing Lin - chair
  • Jong-Kang Liu - co-chair
  • Chi-Hsin Hsu - advisor
  • Files
  • etd-0707105-161158.pdf
  • indicate in-campus access immediately and off_campus access in a year
    Date of Submission 2005-07-07

    [Back to Results | New Search]


    Browse | Search All Available ETDs

    If you have more questions or technical problems, please contact eThesys