Reinhold V N, Ishikawa Y, Melville D B
J Bacteriol. 1970 Mar;101(3):881-4. doi: 10.1128/jb.101.3.881-884.1970.
Cell-free extracts of Neurospora crassa mycelium catalyze the methylation of l-histidine to form hercynine (histidine betaine). The partially methylated compounds, alpha-N-methyl-l-histidine and alpha-N,N-dimethyl-l-histidine, are also methylated by the same enzyme preparation to form hercynine. All three methylation reactions are stimulated by the addition of S-adenosylmethionine.
粗糙脉孢菌菌丝体的无细胞提取物催化L-组氨酸甲基化形成肌肽(组氨酸甜菜碱)。部分甲基化的化合物,α-N-甲基-L-组氨酸和α-N,N-二甲基-L-组氨酸,也可被相同的酶制剂甲基化形成肌肽。所有这三种甲基化反应都因添加S-腺苷甲硫氨酸而受到刺激。