Antibiotic 107891, its factors a1 and a2, pharmaceutically...

C - Chemistry – Metallurgy – 07 – K

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C07K 14/36 (2006.01) A61K 38/16 (2006.01) A61P 5/00 (2006.01) A61P 31/04 (2006.01) C07K 14/195 (2006.01) C12N 1/20 (2006.01) C12P 21/04 (2006.01)

Patent

CA 2593818

The invention relates to an antibiotic substance of microbial origin, arbitrarily denominated antibiotic 107891 which is produced by fermentation of Microbispora sp. ATCC PTA-5024, the pharmaceutically acceptable salts and compositions thereof, and their use as an antibacterial agent having inhibitory activity versus susceptible microbes. Antibiotic 107891, which is a complex comprising two Factors, denominated Factors A1 and A2, has a peptide structure containing lanthionine and methyllanthionine as constituents which are typical characteristics of the antibiotics of the lantibiotics group. Antibiotic 107891 and its Factors A1 and A2 show a good antibacterial activity against Gram-positive bacteria including methicillin resistant and vancomycin resistant strains, and is active also against some Gram-negative bacteria such as M. catharralis, Neisseria species and H. influenzae and Mycobacteria.

La présente invention concerne une substance antibiotique d'origine microbienne, arbitrairement dénommée antibiotique 107891, qui est produite par fermentation de microbispora sp. Cette invention concerne aussi ATCC PTA-5024, des sels répondant aux normes pharmaceutiques et des compositions de ce composé et leur utilisation comme agent antibactérien possédant une activité inhibitrice contre des microbes sensibles. Cet antibiotique 107891, qui est un complexe comprenant deux facteurs, dénommée facteurs A1 et A2, possède une structure peptidique contenant de la lanthionine et de la méthyllanthionine comme constituants qui sont des caractéristiques habituelles des antibiotiques du groupe des lantibiotiques. L'antibiotique 10891 et ses facteurs A1 et A2 présentent une bonne activité antibactérienne contre la bactérie gram-positif comprenant des souches résistantes à la méthicilline et à la vancomycine, de même que cet antibiotique est actif contre quelques bactérie gram-négatif telles que des espèces M. catharralis, Neisseria et H. influenzae et Mycobacteria.

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