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    • 7. 发明授权
    • Methlating enzyme from streptomyces MA6858
    • 来自链霉菌MA6858的浓缩酶
    • US5264355A
    • 1993-11-23
    • US908244
    • 1992-07-02
    • Ali ShafieePatricia M. CameronDavid A. BoultonLouis KaplanHaideh Motamedi
    • Ali ShafieePatricia M. CameronDavid A. BoultonLouis KaplanHaideh Motamedi
    • C12N9/10C12N9/08
    • C12N9/1007
    • Described is a new enzyme, 31-O-desmethyl-FK-506 O-methyltransferase (FKMT) and its N-terminal amino acid sequence. This enzyme can specifically and preferentially methylate the C-31 hydroxy group in 31-O-desmethyl FK-506/FR-900506 and other 31-O-desmethyl analogs of FK-506/FR-900506 and related compounds such as 31-O-desmethyl immunomycin type molecules, also designated FK-520 and FR-900520 by Fujisawa. The enzyme can be isolated from a FK-506 producing microorganism Streptomyces sp. (Merck Culture Collection No. MA 6858) ATCC No. 55098. Employing the enzyme in its active form, supplemented with Mg.sup.+2 ion, in the presence of the methyl donor, S-adenosyl methionine (SAM), derivatives of 31-O-desmethyl FK-506, 31-O-desmethyl FK-520 and related 31-O-desmethyl compounds may be prepared.
    • 描述了一种新的酶,31-O-去甲基-FK-506 O-甲基转移酶(FKMT)及其N-末端氨基酸序列。 该酶可以特异地和优先地甲基化31-O-脱甲基FK-506 / FR-900506中的C-31羟基和FK-506 / FR-900506的其它31-O-脱甲基类似物和相关化合物如31-O 也称为Fujisawa的FK-520和FR-900520。 该酶可以从FK-506产生的微生物链霉菌(Streptomyces sp。)中分离出来。 (Merck Culture Collection No.MA6858)ATCC No.55098.在甲基供体存在下使用活性形式的补充了Mg + 2离子的酶,S-腺苷甲硫氨酸(SAM),31-O的衍生物 - 甲基FK-506,31-O-去甲基FK-520和相关的31-O-脱甲基化合物。