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Biodiversity of Antimicrobial-Producing Actinomycetes Strains Isolated from Dry Dipterocarp Forest Soil in Northeast Thailand BABT
Chanthasena,Panjamaphon; Nantapong,Nawarat.
The increasing use of antibiotics has led to the development of drug-resistant microorganisms. The emergence of resistant strains has compromised the treatment and control of infectious diseases. As a result, the search and development of a novel class of antibiotic drugs are required. Actinomycetes have been recognized as a richest source of secondary metabolites including antibiotics. The aim of this study was to investigate the diversity of antibiotic-producing soil Actinomycetes from dry dipterocarp forest in Northeast of Thailand. The soil from this area has been known for its poor in nutrients and highly acidic with pH values around 4.5. In such a harsh condition, soil-inhabiting Actinomycetes elevate their protective mechanisms by inducing the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil bacteria; Antibiotics; Actinomycetes; Streptomyces.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100417
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Draft genome sequence of Streptomyces sp. strain F1, a potential source for glycoside hydrolases isolated from Brazilian soil BJM
Melo,Ricardo Rodrigues de; Persinoti,Gabriela Felix; Paixão,Douglas Antonio Alvaredo; Squina,Fábio Márcio; Ruller,Roberto; Sato,Helia Harumi.
ABSTRACT Here, we show the draft genome sequence of Streptomyces sp. F1, a strain isolated from soil with great potential for secretion of hydrolytic enzymes used to deconstruct cellulosic biomass. The draft genome assembly of Streptomyces sp. strain F1 has 69 contigs with a total genome size of 8,142,296 bp and G + C 72.65%. Preliminary genome analysis identified 175 proteins as Carbohydrate-Active Enzymes, being 85 glycoside hydrolases organized in 33 distinct families. This draft genome information provides new insights on the key genes encoding hydrolytic enzymes involved in biomass deconstruction employed by soil bacteria.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Actinobacteria; Glycoside hydrolases; Streptomyces; Draft genome sequence; Soil bacteria.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822017000400612
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Screening of bacterial extracellular xylanase producers with potential for cellulose pulp biobleaching Biological Sciences
Rodrigues, Isabela da Silva Vasconcelos; Silva, Carolina Goes Silva e; Silva, Rafael Salomão da; Dolabella, Silvio Santana; Fernandes, Marcelo Ferreira; Fernandes, Roberta Pereira Miranda.
In this study, two hundred fifty-seven bacterial isolates from a suppressive soil library were screened to study their secretion of alkali-thermostable xylanases for potential use in cellulose pulp biobleaching. Xylanase activity was evaluated in solid and liquid media using xylan as the carbon source. Isolates were initially evaluated for the degradation of xylan in solid media by the congo red test. Selected strains were evaluated in liquid media for enzymatic activity and determination of total protein concentration using a crude protein extract (CPE). An isolate identified as Bacillus species TC-DT13 produced the highest amount of xylanase (1808 U mL-1). The isolate was active and stable at 70°C and pH 9.0, conditions which are necessary for the paper...
Tipo: Info:eu-repo/semantics/article Palavras-chave: 2.08.00.00-2; 2.08.05.00-4 alkali–thermostable enzyme; Soil bacteria; Biochemical characterization; Bacillus spp. Enzimologia.
Ano: 2019 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/42101
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