Gulmezian Melissa, Zhang Haitao, Javor George T, Clarke Catherine F
Department of Chemistry and Biochemistry and the Molecular Biology Institute, University of California, Los Angeles, California 90095-1569, USA.
J Bacteriol. 2006 Sep;188(17):6435-9. doi: 10.1128/JB.00668-06.
IS16 is a thiol-sensitive, Q-deficient mutant strain of Escherichia coli. Here, we show that IS16 harbors a mutation in the ubiG gene encoding a methyltransferase required for two O-methylation steps of Q biosynthesis. Complementation of IS16 with either ubiG or ubiX(K-12) reverses this phenotype, suggesting that UbiX may interact with UbiG.
IS16是一种对硫醇敏感、缺乏泛醌(Q)的大肠杆菌突变菌株。在此,我们表明IS16在编码泛醌生物合成两个O-甲基化步骤所需甲基转移酶的ubiG基因中存在突变。用ubiG或ubiX(K-12)对IS16进行互补可逆转此表型,这表明UbiX可能与UbiG相互作用。