Characterization of novel nicotine degrading bacteria, arthrobacter sp. ND1 = 분리된 새로운 니코틴 분해 균주, Arthrobacter sp. ND1 의 특성연구

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From activated sludge collected from sewage treatment plant (Daejon, Korea) five nicotine-degrading bacterial strains were isolated. Among them one isolate having the highest nicotine degradation activity was selected for further characterization. This strain was Gram-positive, aerobic, motile, catalase positive, oxidase positive, and blue pigment was formed from nicotine. This strain showed typical rod-coccus growth cycle. Growth occurred between 5 and 30 ℃ and optimum growth was observed at 25-30 ℃ (psychrophilic) and pH 7-8. Isolated strain ND1 had cell wall peptidoglycan type of A3α variant and the major menaquinone is MK-9($H_2$). The cell wall sugar is galactose. The predominating cellular fatty acids were terminally branched fatty acids anteiso-pentadecanoic acid (15:0 anteiso) and anteiso-heptadecanoic acid (17:0 anteiso). The G+C content of DNA was 63.6 %. The 16S rDNA-based phylogenetic analysis clearly established the strain ND1 as a member of the genus Arthrobacter. The 16S rDNA sequence of strain ND1 showed highest similarity values of 99.4% to Arthrobacter ureafaciens with the DNA-DNA relatedness levels of 82%. Due to morphological, physiological, chemotaxonomical and molecular systematical characteristics this strain was identified as new strain of Arthrobacter ureafaciens. The strain ND1 could utilize nicotine as its sole carbon and nitrogen source for the growth. Strain ND1 almost completely degraded 1.0 mM of nicotine within 48 h with growth yield of 0.105 g cell / L. 20mM of nicotine slightly inhibited cell growth and 30mM of nicotine completely inhibited cell growth and nicotine degradation. Many aromatic toxic compounds were degraded by this strain.
Advisors
Lee, Sung-Taikresearcher이성택researcher
Description
한국과학기술원 : 생물과학과,
Publisher
한국과학기술원
Issue Date
2003
Identifier
230634/325007  / 020013918
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 생물과학과, 2003.8, [ iv, 31 p. ]

Keywords

Arthrobacter; Nicotine; 니코틴; 아쓰로박터

URI
http://hdl.handle.net/10203/28009
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=230634&flag=dissertation
Appears in Collection
BS-Theses_Master(석사논문)
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