Production of violet pigment by a newly isolated psychrotrophic bacterium from a glacier in Xinjiang, China
文献类型: 外文期刊
作者: Lu, Yuan 1 ; Wang, Liyan 1 ; Xue, Yuan 1 ; Zhang, Chong 1 ; Xing, Xin-Hui 1 ; Lou, Kai 2 ; Zhang, Zhidong 2 ; Li, Yong 3 ; Z 1 ;
作者机构: 1.Tsinghua Univ, Dept Chem Engn, Beijing 100084, Peoples R China
2.Xinjiang Acad Agr Sci, Inst Microbiol, Urumqi 830000, Peoples R China
3.Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China
4.Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Beijing 100080, Peoples R China
关键词: Cell growth;Fermentation;Janthinobacterium sp.;Pigment production;Violet pigment;Violacein
期刊名称:BIOCHEMICAL ENGINEERING JOURNAL ( 影响因子:3.978; 五年影响因子:4.084 )
ISSN:
年卷期:
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收录情况: SCI
摘要: A psychrotrophic XT1 strain (CGMCC 1194) isolated from a glacier in China's Xinjiang province produced violet pigments at a high content. This strain was identified as Janthinobacterium lividum XT1 by API kit and 16S rDNA analysis. The main fraction of violet pigment was violacein based on the analysis by HPLC-MS and ~1H NMR. The pigment production by J. lividum XT1 was not associated with the cell growth, and a cultivation temperature lower than 20 °C was required for the cell growth and pigment production. Sucrose was the most suitable carbon source, and casein was the best nitrogen source for cell growth and pigment formation. Mineral components in the medium, including CaNO3, FeSO4, riboflavin, MgSO4 and nicotinic acid, showed different effects on the cell growth and pigment production. The maximum pigment productivity reached 0.8 g pigment per dry cell weight. The pigment production pattern by our isolate was different from that by other strains such as J. lividum reported so far.
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