摘要:
New macrocin and lactenocin ester derivatives of the formula: ##STR1## wherein R is formyl or hydroxymethyl; R.sup.1 is hydrogen, acetyl or propionyl; R.sup.2 is hydrogen or ##STR2## and R.sup.3 is hydrogen, acetyl, propionyl, n-butyryl or isovaleryl; provided that one of R.sup.1 or R.sup.3 must be other than hydrogen; and the acid addition salts thereof; prepared by bioconversion of macrocin or lactenocin with an acylating enzyme system produced by Streptomyces thermotolerans strains, have improved activity against Mycoplasma species.
摘要翻译:新的大分子和乳内酯酯衍生物,其分子式如下:其中R是甲酰基或羟甲基; R1是氢,乙酰基或丙酰基; R 2是氢或者R 3是氢,乙酰基,丙酰基,正丁酰基或异戊酰基; 条件是R1或R3中的一个必须不是氢; 及其酸加成盐; 通过使用由嗜热链霉菌菌株产生的酰化酶体系的大分子或乳清素生物转化制备,具有改善的针对支原体物种的活性。
摘要:
New macrocin and lactenocin ester derivatives of the formula: ##STR1## wherein R is formyl or hydroxymethyl; R.sup.1 is hydrogen, acetyl or propionyl; R.sup.2 is hydrogen or ##STR2## and R.sup.3 is hydrogen, acetyl, propionyl, n-butyryl or isovaleryl; provided that one of R.sup.1 or R.sup.3 must be other than hydrogen; and the acid addition salts thereof; prepared by bioconversion of macrocin or lactenocin with an acylating enzyme system produced by Streptomyces thermotolerans strains, have improved activity against Mycoplasma species.
摘要翻译:新的大分子和乳内酯酯衍生物,其分子式如下:其中R是甲酰基或羟甲基; R1是氢,乙酰基或丙酰基; R 2是氢或者R 3是氢,乙酰基,丙酰基,正丁酰基或异戊酰基; 条件是R1或R3中的一个必须不是氢; 及其酸加成盐; 通过使用由嗜热链霉菌菌株产生的酰化酶体系的大分子或乳内酯的生物转化制备,具有改善的针对支原体物种的活性。
摘要:
Spinosyn biosynthetic genes, spinosyn producing microorganisms transformed with the biosynthetic genes, methods using the biosynthetic genes to increase production of spinosyn insecticidal macrolides, and methods using the genes or fragments thereof to change the products produced by spinosyn-producing microorganisms.
摘要:
Spinosyn biosynthetic genes from Saccharopolyspora spinosa, spinosyn producing microorganisms transformed with the biosynthetic genes, methods using the biosynthetic genes to increase production of spinosyn insecticidal macrolides, and methods using the genes or fragments thereof to change the products produced by spinosyn-producing microorganisms are provided.
摘要:
Spinosyn biosynthetic genes, spinosyn producing microorganisms transformed with the biosynthetic genes, methods using the biosynthetic genes to increase production of spinosyn insecticidal macrolides, and methods using the genes or fragments thereof to change the products produced by spinosyn-producing microorganisms.
摘要:
Spinosyn biosynthetic genes from Saccharopolyspora spinosa, spinosyn producing microorganisms transformed with the biosynthetic genes, methods using the biosynthetic genes to increase production of spinosyn insecticidal macrolides, and methods using the genes or fragments thereof to change the products produced by spinosyn-producing microorganisms are provided.
摘要:
The present invention provides cells having more than two drug resistance genes and at least two different resistance genes that have been recombined into the chromosome of a cell. It also teaches the processes for preparing cells by recombining two or more different drug resistance genes into the chromosome of a cell. The invention further shows a screening method using the cells of described herein that may be used to accomplish high throughput screening of, among other things, natural products and/or whole cells isolated from the environment.
摘要:
The invention provides isolated nucleic acid compounds encoding the glycosyltransferase protein GtfA of Amycolatopsis orientalis. Also provided are vectors carrying the gtfA gene, transformed heterologous host cells for expressing the GtfA protein, and methods for producing glycopeptide compounds using the cloned gtfA gene.
摘要:
The invention provides isolated nucleic acid compounds encoding the glycosyltransferase protein GtfB of Amycolatopsis orientalis. Also provided are vectors carrying the gtfB gene, transformed heterologous host cells for expressing the GtfB protein, and methods for producing glycopeptide compounds using the cloned gtfB gene.
摘要:
23-Demycinosyltylosin (DMT) which has the formula: ##STR1## 20-dihydro-DMT, specified acyl ester derivatives, and their acid addition salts are useful antibacterial agents. Improved methods of making 5-O-mycaminosyltylonolide (OMT) and 20-dihydro-OMT by mild acid hydrolysis of DMT and 20-dihydro-DMT, respectively, are included.