摘要:
By culturing Lysobacter sp. BMK333-48F3 (Accession No. FERM BP-7477), antibiotics tripropeptin Z, tripropeptin A, tripropeptin B, tripropeptin C and tripropeptin D represented by general formula (I) are obtained as antibiotics showing an excellent antibacterial effect on bacteria and having a novel molecular skeleton, wherein R represents 7-methyl-octyl, 8-methyl-nonyl, 9-methyl-decyl, 10-methyl-undecyl or 11-methyl-dodecyl. These tripropeptins have an excellent antibacterial activity on various bacteria and drug-tolerant strains thereof such as methicillin-tolerant strains and vancomycin-tolerant strains.
摘要:
Delaminomycins A, B and C, represented by general formula (I) or (I'), or salts thereof, delaminomycins A2, B2 and C2, represented by general formula (II), and sulfates of delaminomycins A2 to C2, represented by general formula (III), or salts thereof. The delaminomycins selectively inhibit T cells, have the activity of inhibiting the growth of certain cancer cells, and are antibacterial.
摘要:
An antibiotic SF2487 substance having the formula (I) or a salt thereof possesses an antimalarial activity against the proliferation of malarial parasites and is therefore useful as an antimalarial drug.
摘要:
There have been obtained, by cultivation of Streptomyces sp. MK730-62F2 (deposit number of FERM BP-7218), antibiotic caprazamycins A to F having by the following general formula (I) wherein R is tridecyl group, 11-methyl-dodecyl group, and others. These caprazamycins have excellent antibacterial activities against various acid-fast bacteria and various bacteria as well as their drug-resistant strains.
摘要:
As novel substances having an activity of inducing an apoptosis even on the apoptosis-resistant cancer cells, there are obtained polyoxypeptin and deoxypolyoxypeptin represented by the following general formula (I) wherein R denotes a hydroxyl group for polyoxypeptin, or R denotes a hydrogen atom for deoxypolyoxypeptin, by cultivation of Streptomyces sp. MK498-98F14 strain. Polyoxypeptin and deoxypolyoxypeptin are physiologically active substances which have an activity of inducing apoptosis on a human pancreatic adenocarcinoma cell, AsPC-1 cell.
摘要:
An antibiotic SF2487 substance having the formula (I) or a salt thereof possesses an antimalarial activity against the proliferation of malarial parasites and is therefore useful as an antimalarial drug.
摘要:
By culturing Lysobacter sp. BMK333-48F3 (deposit number of FERM BP-7477), an antibiotic, tripropeptin Z, tripropeptin A, tripropeptin B, tripropeptin C or tripropeptin D represented by the general formula (I): wherein R is 7-methyl-octyl group, 8-methyl-nonyl group, 9-methyl-dodecyl group, 10-methyl-undecyl group or 11-methyl-dodecyl group, is obtained as antibiotics having excellent antibacterial activities against bacteria and having a novel molecular structure. These tripropeptins each have an excellent antibacterial activity against various bacteria and drug-resistant strains thereof, such as methicillin-resistant strains and vancomycin-resistant strains.
摘要:
Postostatin, a new physiologically active substance represented by (I), can be isolated from the culture medium of an actinomycete belonging to the genus Streptomyces. It is a peptide compound having a new structure wherein a keto group is present in the peptide chain and it has a potent endopeptidase inhibitory activity. A postostatin-related compound having a keto group in the peptide chain can he synthesized chemically and this compound has a similar endopeptidase inhibitory activity.