Arisawa A, Kawamura N, Takeda K, Tsunekawa H, Okamura K, Okamoto R
Mercian Corporation, Central Research Laboratories, Kanagawa, Japan.
Appl Environ Microbiol. 1994 Jul;60(7):2657-60. doi: 10.1128/aem.60.7.2657-2660.1994.
A gene encoding the macrolide modification enzyme 3-O-acyltransferase (acyA) was cloned by chromosome walking onto the carbomycin biosynthetic region in Streptomyces thermotolerans TH475, with the 3' region of the gene encoding the macrolide modification enzyme 4"-O-acyltransferase (acyB1) as a probe. A shortened fragment (1.8 kb) containing acyA was subcloned with pIJ350. A high-level tylosin producer, Streptomyces fradiae MBBF, transformed with the plasmid could produce a hybrid macrolide, 3-O-acetyltylosin, most efficiently.
以编码大环内酯修饰酶4″-O-酰基转移酶(acyB1)的基因3′区域为探针,通过染色体步移法克隆了编码大环内酯修饰酶3-O-酰基转移酶(acyA)的基因,该基因位于耐热链霉菌TH475的碳霉素生物合成区域。将含有acyA的缩短片段(1.8 kb)亚克隆到pIJ350中。用该质粒转化的高产泰乐菌素的弗氏链霉菌MBBF能够最有效地产生一种杂合大环内酯3-O-乙酰泰乐菌素。