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Cloning and characterization of Kluyveromyces marxianus Hog1 gene
Jiangchao Qian1, Xiulin Qin, Qin Yin
1State Key Laboratory of Bioreactor Engineering, East China University of Science & Technology, 130 Meilong Road, Shanghai, 200237, People's Republic of China.
Abstract:
The mitogen-activated protein kinase Hog1 gene (Kmhog1) was isolated from Kluyveromyces marxianus strain NBRC 1777 by degenerate PCR and genome walking, and then disrupted to construct a mutant strain hog1∆. The mutant was now more sensitive to acetic acid and its growth was nearly completely inhibited by 0.5 M NaCl (97%) and 10 mM H(2)O(2) (93%) as compared with the wild-type cells. However, neither strain grew at 47°C. Kmhog1 may thus be required for adaptation to acetic acid, osmotic, and oxidative stress but is not involved in thermotolerance.
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