| Registro completo |
| Provedor de dados: |
BJPS
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| País: |
Brazil
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| Título: |
Antimicrobial activity of actinomycetes and characterization of actinomycin-producing strain KRG-1 isolated from Karoo, South Africa
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| Autores: |
Charousová,Ivana
Medo,Juraj
Hleba,Lukáš
Císarová,Miroslava
Javoreková,Soňa
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| Data: |
2019-01-01
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| Ano: |
2019
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| Palavras-chave: |
Actinomycin/antimicrobial activity
Streptomyces
Soil
16S rRNA
MALDI-TOF MS
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| Resumo: |
In the present study we reported the antimicrobial activity of actinomycetes isolated from aridic soil sample collected in Karoo, South Africa. Eighty-six actinomycete strains were isolated and purified, out of them thirty-four morphologically different strains were tested for antimicrobial activity. Among 35 isolates, 10 (28.57%) showed both antibacterial and antifungal activity. The ethyl acetate extract of strain KRG-1 showed the strongest antimicrobial activity and therefore was selected for further investigation. The almost complete nucleotide sequence of the 16S rRNA gene as well as distinctive matrix-assisted laser desorption/ionization-time-of-flight/mass spectrometry (MALDI-TOF/MS) profile of whole-cell proteins acquired for strain KRG-1 led to the identification of Streptomyces antibioticus KRG-1 (GenBank accession number: KX827270). The ethyl acetate extract of KRG-1 was fractionated by HPLC method against the most suppressed bacterium Staphylococcus aureus (Newman). LC//MS analysis led to the identification of the active peak that exhibited UV-VIS maxima at 442 nm and the ESI-HRMS spectrum showing the prominent ion clusters for [M-H2O+H]+ at m/z 635.3109 and for [M+Na]+ at m/z 1269.6148. This information could be assigned to chromopeptide lactone antibiotic - actinomycin. Our results suggest that unexplored soils could be an interesting source for exploring antibacterial secondary metabolites.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502019000100594
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| Editor: |
Universidade de São Paulo, Faculdade de Ciências Farmacêuticas
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| Relação: |
10.1590/s2175-97902019000217249
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| Formato: |
text/html
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| Fonte: |
Brazilian Journal of Pharmaceutical Sciences v.55 2019
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| Direitos: |
info:eu-repo/semantics/openAccess
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