Thiosulfate Oxidation and Mixotrophic Growth of Methylobacterium goesingense and Methylobacterium fujisawaense

被引:20
作者
Anandham, R. [1 ,2 ]
Indiragandhi, P. [1 ]
Madhaiyan, M. [1 ]
Chung, Jongbae [3 ]
Ryu, Kyoung Yul [2 ]
Jee, Hyeong Jin [2 ]
Sa, Tongmin [1 ]
机构
[1] Chungbuk Natl Univ, Dept Agr Chem, Cheongju 361763, South Korea
[2] RDA, Natl Inst Agr Sci & Technol, Organ Farming Div, Suwon 441707, South Korea
[3] Daegu Univ, Dept Life & Environm Sci, Gyongsan 712714, South Korea
关键词
Thiosulfate oxidation; mixotrophic growth; rhodanese; sulfite oxidase; soxB; S4I; PSO; INORGANIC SULFUR-COMPOUNDS; THIOBACILLUS-NOVELLUS; OXIDIZING BACTERIUM; SOXB GENE; SP-NOV; HYPHOMICROBIUM; DEHYDROGENASE; TETRATHIONATE; BURKHOLDERIA; CYTOCHROMES;
D O I
10.4014/jmb.0802.127
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
The mixotrophic growth with methanol plus thiosulfate was examined in nutrient-limited mixotrophic condition for Methylobacterium goesingense CBMB5 and Methylobacterium fujisawaense CBMB37. Thiosulfate oxidation increased the growth and protein yield in mixotrophic medium that contained 150 mM methanol and 20 mM sodium thiosulfate, at 144 h. Respirometric study revealed that thiosulfate was the most preferable reduced inorganic sulfur source, followed by sulfite and sulfur. M. goesingense CBMB5 and M. fujisawaense CBMB37 oxidized thiosulfate directly to sulfate, and intermediate products of thiosulfate oxidation such as polythionates, sulfite, and sulfur were not detected in spent medium and they did not yield positive amplification for tested soxB primers. Enzymes of thiosulfate oxidation such as rhodanese and sulfite oxidase activities were detected in cell-free extracts of M. goesingense CBMB5, and M. fujisawaense CBMB37, and thiosulfate oxidase (tetrathionate synthase) activity was not observed. It indicated that both the organisms use the "non-S-4 intermediate" sulfur oxidation pathway for thiosulfate oxidation. It is concluded from this study that M. goesingense CBMB5, and M. fujisawaense CBMB37 exhibited mixotrophic metabolism in medium containing methanol plus thiosulfate and that thiosulfate oxidation and the presence of a "Paracoccus sulfur oxidation" (PSO) pathway in methylotrophic bacteria are species dependant.
引用
收藏
页码:17 / 22
页数:6
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