Kort E N, Goy M F, Larsen S H, Adler J
Proc Natl Acad Sci U S A. 1975 Oct;72(10):3939-43. doi: 10.1073/pnas.72.10.3939.
A protein methylation reaction involved in chemotaxis of Escherichia coli has been identified. The involvement of this reaction in chemotaxis in indicated by four lines of evidence. (a) The methylation reaction is altered in several classes of generally nonchemotactic mutants and is coreverted with the chemotaxis defects. (b) The methylation level of the protein is affected by chemotactic stimuli. (c) The transferred methyl group is derived from methionine and is labile, in accord with the known fact that chemotaxis requires a continuous supply of methionine. (d) Methylation is abnormal in various mutants having defective or missing flagella.
已鉴定出一种参与大肠杆菌趋化作用的蛋白质甲基化反应。有四条证据表明该反应参与趋化作用。(a) 甲基化反应在几类通常无趋化性的突变体中发生改变,并与趋化缺陷一同恢复。(b) 蛋白质的甲基化水平受趋化刺激影响。(c) 转移的甲基基团来源于甲硫氨酸且不稳定,这与已知的趋化作用需要持续供应甲硫氨酸这一事实相符。(d) 在各种鞭毛有缺陷或缺失的突变体中,甲基化异常。