摘要:
DNA cloning shuttle vectors, including a cosmid shuttle vector, for E. coli and Streptomyces are disclosed. Specifically, disclosed shuttle vectors pAL7002 (NRRL B-18055) and pNJ1 (NRRL B-18054) contain an E. coli origin of replication, Streptomyces replication functions, and antibiotic resistance markers for both E. coli and Streptomyces. In addition, pNJ1 contains a cos sequence. Novel 2-norerythromycin antibiotics A, B, C, and D, which were produced in a strain Streptomyces erythreus 12693-240 (NRRL B-18053) transformed by pNJ1 bearing DNA from Streptomyces antibioticus, are also disclosed. The present invention also provides a method for producing novel antibiotics. This method for antibiotic production is applied to the transformation of a blocked mutant of S. erythreus with genomic DNA from S. antibioticus but may be more broadly applied to genes of antibiotic-producing strains transformed into cells which are blocked in the pathway for production of a different antibiotic.
摘要:
DNA cloning shuttle vectors, including a cosmid shuttle vector, for E. coli and Streptomyces are disclosed. Specifically, disclosed shuttle vectors pAL7002 (NRRL B-18055) and pNJl (NRRL B-18054) contain an E. coli origin of replication, Streptomyces replication functions, and antibiotic resistance markers for both E. coli and Streptomyces. In addition, pNJl contains a cos sequence. Novel 2-norerythromycin antibiotics A, B, C, and D, which were produced in a strain Streptomyces erythreus 12693-240 (NRRL B-18053) transformed by pNJl bearing DNA from Streptomyces antibioticus, are also disclosed. The present invention also provides a method for producing novel antibiotics. This method for antibiotic production is applied to the transformation of a blocked mutant of S. erythreus with genomic DNA from S. antibioticus but may be more broadly applied to genes to antibiotic-producing strains transformed into cells which are blocked in the pathway for production of a different antibiotic.
摘要:
A method of producing 1-epi-2-deoxyfortimicin A, key intermediates therefor and an improved process for synthesizing the key intermediate 1,2-di-epi-fortimicin A.
摘要:
A new fortimicin, fortimicin AK. The compound is coproduced in the fermentation of Micromonospora olivoasterospora ATCC No. 21819, 31009 or 31010 along with fortimicin A, fortimicin B isofortimicin, fortimicin E and a number of other minor factors. The compound is useful as an intermediate in synthesizing fortimicin AK derivatives which are useful as antibiotics.
摘要:
Derivatives of fortimicin AK are provided by this invention. The derivatives are 4-N, 2'-N- and 4,2'-di-N-derivatives of fortimicin AK which are useful as anti-bacterial agents.
摘要:
5-Deoxyfortimicin A, 2,5-dideoxyfortimicin A and the corresponding 4-N-acyl and alkyl fortimicin B derivatives thereof, pharmaceutically acceptable salts thereof, intermediates therefor, and pharmaceutical compositions containing the compounds of this invention. The fortimicin derivatives are represented by the formula: ##STR1## wherein R is selected from the group consisting of acyl, hydroxyacyl, aminoacyl, N-monoloweralkylaminoacyl, N,N-diloweralkylaminoacyl, hydroxyacyl, hydroxy-substituted aminoacyl or an amino acid residue other than glycyl, loweralkyl, aminoloweralkyl, hydroxyloweralkyl, N-monoloweralkylaminoloweralkyl, N-N-diloweralkylaminoloweralkyl or hydroxy-substituted aminoloweralkyl; R.sub.1 is hydrogen or hydroxy; and R.sub.2 is hydrogen or hydroxy with the limitation that either R.sub.1 and R.sub.2 each are hydrogen or when only one of R.sub.1 or R.sub.2 are hydrogen, R.sub.2 is hydrogen and R.sub.1 is hydroxy and R.sub.1 and R.sub.2 both cannot be hydroxy.
摘要:
The present invention provides cyclic hexadepsipeptides and their pharmaceutically acceptable salts, solvates and prodrugs, and methods for obtaining the compounds, by fermentation, optionally followed by post-biosynthesis chemical modification. The present invention further provides uses of cyclic hexadepsipeptides, and their pharmaceutically acceptable salts, solvates and prodrugs as pharmaceuticals, in particular to their use as antibacterial, antifungal or antineoplastic agents, and to pharmaceutical compositions comprising a cyclic hexadepsipeptide, or a pharmaceutically acceptable salt, solvate or prodrug thereof, together with a carrier.
摘要:
The present invention provides cyclic hexadepsipeptides and their pharmaceutically acceptable salts, solvates and prodrugs, and methods for obtaining the compounds, by fermentation, optionally followed by post-biosynthesis chemical modification. The present invention further provides uses of cyclic hexadepsipeptides, and their pharmaceutically acceptable salts, solvates and prodrugs as pharmaceuticals, in particular to their use as antibacterial, antifungal or antineoplastic agents, and to pharmaceutical compositions comprising a cyclic hexadepsipeptide, or a pharmaceutically acceptable salt, solvate or prodrug thereof, together with a carrier.
摘要:
The invention relates to biologically active dibenzodiazepinone analogs represented by Formula I, to methods of producing them, and their use in the preparation of medicaments for the treatment of neoplastic conditions
摘要:
Polyene oxazoles of the following formula wherein R3 is selected from H and methyl, are disclosed. Such compounds, and pharmaceutically acceptable salts thereof, may be used in the inhibition of tumor cell growth. The polyene oxazoles and their pharmaceutically acceptable salts may be formulated as pharmaceutical compositions with pharmaceutically acceptable carriers for use in the inhibition of tumor cells. The polyene oxazoles may be obtained from strains of Streptomyces sparsogenes, such as strain 022 having deposit number IDAC 270504-04.