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논문 기본 정보

자료유형
학술저널
저자정보
Kim Seon Min (Department of Microbiology, College of Natural Sciences, Pukyong National University, Busan 48513, Republic of KoreaSchool of Marine and Fisheries Life Science, Pukyong National University,) Lee Hye In (Department of Microbiology, College of Natural Sciences, Pukyong National University, Busan 48513, Republic of KoreaSchool of Marine and Fisheries Life Science, Pukyong National University,) Nam Seung Won (Bioresources Collection and Research Team, Nakdonggang National Institute of Biological Resources, Sangju 37242, Republic of Korea) Jin Deok Hyeon (Bioresources Collection and Research Team, Nakdonggang National Institute of Biological Resources, Sangju 37242, Republic of Korea) Jeong Gwi-Taek (School of Marine and Fisheries Life Science, Pukyong National University, Busan 48513, Republic of KoreaDepartment of Biotechnology, Pukyong National University, Busan 48513, Republic of Kor) Nam Soo-Wan (Department of Smart Bio-Health, Dong-eui University, Busan 47340, Republic of KoreaBiomedical Engineering and Biotechnology Major, Division of Applied Bioengineering, College of Engineering,) Burns Brendan (School of Biotechnology & Biomolecular Science, The University of New South Wales, Sydney, NSW 2052, Australia) Jeon Young Jae (Department of Microbiology, College of Natural Sciences, Pukyong National University, Busan 48513, Republic of KoreaSchool of Marine and Fisheries Life Science, Pukyong National University,)
저널정보
한국미생물생명공학회 Journal of Microbiology and Biotechnology Journal of Microbiology and Biotechnology Vol.34 No.1
발행연도
2024.1
수록면
74 - 84 (11page)
DOI
10.4014/jmb.2305.05025

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초록· 키워드

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The study objective was to evaluate the potential production of polyhydroxyalkanoates (PHAs), a biodegradable plastic material, by Paracoccus haeundaensis for which PHA production has never been reported. To identify the most effective nitrogen-limited culture conditions for PHAs production from this bacterium, batch fermentation using glucose concentrations ranging from 4 g l-1 to 20 g l-1 with a fixed ammonium concentration of 0.5 g l-1 was carried out at 30o C and pH 8.0. A glucose supplement of 12 g l-1 produced the highest PHA concentration (1.6 g l-1) and PHA content (0.63 g g -1) thereby identifying the optimal condition for PHA production from this bacterium. Gas chromatography-mass spectrometry analysis suggests that P. haeundaensis mostly produced copolymer types of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(3HB-co-3HV)] from glucose concentrations at 12 g l-1 or higher under the nitrogen-limited conditions. When several other single carbon sources were evaluated for the most efficient PHA production, fructose provided the highest biomass (2.8 g l-1), and PHAs (1.29 g l-1) concentrations. Results indicated that this bacterium mostly produced the copolymers P(3HB-co-3HV) from single carbon sources composing a range of 93–98% of 3-hydroxybutyrate and 2–7% of 3-hydroxyvalerate, whereas mannose-supplemented conditions produced the only homopolymer type of P(3HB). However, when propionic acid as a secondary carbon source were supplemented into the media, P. haeundaensis produced the copolymer P(3HBco-3HV), composed of a 50% maximum monomeric unit of 3-hydroxyvaleric acid (3HV). However, as the concentration of propionic acid increased, cell biomass and PHAs concentrations substantially decreased due to cell toxicity.
#Paracoccus haeundaensis #nitrogen-limited conditions #polyhydroxyalkanoates #poly(3-hydroxybutyrate) #poly(3-hydroxybutyrate-co-3-hydroxyvalerate) #batch fermentation

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