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1.
J Antibiot (Tokyo) ; 42(12): 1790-7, 1989 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-2621162

RESUMO

By a combination of chemical and spectroscopic (1H and 13C NMR) studies the structure of a glycopeptide antibiotic eremomycin has been elucidated. It is closely related to vancomycin, but differs in sugar and chlorine content. The eremomycin aglycone contains monodechlorovancomycinic acid; the only chlorine atom is situated in the second amino acid after the N-terminal amino acid residue of the peptide. The sugar part is composed of glucose and two residues of an amino sugar shown to be 2,3,6-trideoxy-3-amino-C-3-methyl-L-arabino-hexopyranose (4-epi-vancosamine). One of the amino sugar residues is a component of the disaccharide 2-O-(alpha-L-4-epi-vancosaminyl)-beta-D-glucopyranose, attached to a triphenyl ether moiety; the position of another one is at the serine oxygen in the C-terminal region of the aglycone.


Assuntos
Antibacterianos , Peptídeos Catiônicos Antimicrobianos , Fenômenos Químicos , Química , Glicopeptídeos , Espectroscopia de Ressonância Magnética , Dados de Sequência Molecular , Peptídeos , Espectrofotometria Infravermelho , Espectrofotometria Ultravioleta
3.
Antibiot Chemother (1971) ; 28: 102-8, 1980.
Artigo em Inglês | MEDLINE | ID: mdl-6158286

RESUMO

Basic concepts of interaction of antineoplastic antibiotics with DNA are discussed and information concerning the effects of actinomycins, olivomycin and related antibiotics, anthracyclines, sibiromycin, mitomycin C, bruneomycin, and bleomycin is summarized.


Assuntos
Aminoglicosídeos , Antibióticos Antineoplásicos/metabolismo , DNA/biossíntese , Bleomicina/metabolismo , Células Cultivadas , DNA/genética , Dactinomicina/metabolismo , Glicosídeos/metabolismo , Humanos , Mitomicinas/metabolismo , Naftacenos/metabolismo , Olivomicina/metabolismo , Estreptonigrina/metabolismo
5.
Antibiot Chemother (1971) ; 23: 21-5, 1978.
Artigo em Inglês | MEDLINE | ID: mdl-348079

RESUMO

Yeast mutants with distorted cell membranes, which are selectively inhibited by anticancer antibiotics and are not affected by antibacterial antibiotics, could be of considerable interest as test organisms. They could be used for the isolation of active antitumor substances from complex mixtures of natural compounds.


Assuntos
Antibióticos Antineoplásicos/farmacologia , Saccharomyces cerevisiae/efeitos dos fármacos , Carrubicina/análogos & derivados , Carrubicina/farmacologia , Membrana Celular/efeitos dos fármacos , Avaliação Pré-Clínica de Medicamentos/métodos , Mutação/efeitos dos fármacos , Saccharomyces cerevisiae/genética , Saccharomyces cerevisiae/ultraestrutura
19.
Science ; 157(3793): 1196-7, 1967 Sep 08.
Artigo em Inglês | MEDLINE | ID: mdl-6038693

RESUMO

The culture of Bacterium paracoli 5099 represents a favorable system for induction of mutants with altered DNA base composition. The frequency of induction of these mutants by ultraviolet radiation is strongly dose-dependent, and has a peak at the ultraviolet exposure equal to 860 ergs. On both sides of this maximum the rate of appearance of mutants decreases, and with the exposures less than 350 and more than 1900 ergs per square millimeter, mutants with altered DNA base composition do not appear at all.


Assuntos
Citosina/análise , DNA Bacteriano/análise , Enterobacteriaceae/efeitos da radiação , Guanina/análise , Mutação , Radiogenética , Raios Ultravioleta , Resistência Microbiana a Medicamentos , Canamicina , Biologia Molecular
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