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Chartreusin and elsamicin A are structurally related antibiotics that bind to GC-rich tracts in DNA, with a clear preference for B-DNA over Z-DNA. They inhibit RNA synthesis and cause single-strand scission of DNA via the formation of free radicals. Elsamicin A can also be regarded as the most
New antitumor antibiotics, elsamicins A and B, were isolated from the culture broth of an unidentified actinomycete strain J907-21 (ATCC 39417). They are structurally related to chartreusin, containing the common aglycone, chartarin, but contain different sugar moieties. Elsamicin A, the major
The sequence specificity of elsamicin A, an anti-tumour antibiotic, binding to DNA was elucidated considering the inhibition of the rate of digestion of linearised pBR322 DNA by AatII, ClaI, EcoRI, HindIII and NruI restriction enzymes. Elsamicin A inhibits the rate of digestion by NruI (recognition
The ability of elsamicin A, an antitumour antibiotic, to cleave DNA in the presence of ferrous iron and reducing agents, has been analysed using experimental and theoretical approaches. Experimentally, the antibiotic causes DNA breakage in the presence of ferrous ions and a reducing agent. The
Natural products of the benzonaphthopyranone class, such as chartreusin, elsamicin A, gilvocarcin, and polycarcin, represent potent leads for urgently needed anticancer therapeutics and antibiotics. Since synthetic protocols for altering their architectures are limited, we harnessed enzymatic
Effort looking for new antitumor antibiotics useful for the treatment of curing cancer resulted to the discovery of a number of new compounds with newer action mechanism as well as newer structural feature. The antibiotics which have been discovered since 1984 are discussed under classifications of