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| Registros recuperados: 24 | |
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| Procópio,Rudi Emerson de Lima; Silva,Ingrid Reis da; Martins,Mayra Kassawara; Azevedo,João Lúcio de; Araújo,Janete Magali de. |
| Streptomyces is a genus of Gram-positive bacteria that grows in various environments, and its shape resembles filamentous fungi. The morphological differentiation of Streptomyces involves the formation of a layer of hyphae that can differentiate into a chain of spores. The most interesting property of Streptomyces is the ability to produce bioactive secondary metabolites, such as antifungals, antivirals, antitumorals, anti-hypertensives, immunosuppressants, and especially antibiotics. The production of most antibiotics is species specific, and these secondary metabolites are important for Streptomyces species in order to compete with other microorganisms that come in contact, even within the same genre. Despite the success of the discovery of antibiotics,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Streptomyces; Antibiotics; Resistance; Infection. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702012000500011 |
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| 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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| 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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| Cohen, Michael F.; Mazzola, Mark. |
| Bacterial and protozoan populations were monitored in orchard soil amended with Brassica napus seed meal. Numbers of fluorescent pseudomonads peaked one week following incorporation of the amendment and declined thereafter, whereas populations of Streptomyces spp. increased to stable levels nearly 20-fold higher than in non-treated soil. The amoeba-flagellate Naegleria americana, isolated from the amended soil, showed a marked feeding preference in culture for fluorescent pseudomonads relative to Streptomyces spp. Amended soils showed rapid declines in RSM-derived cis-oleic acid that paralleled increases in the numbers of bacteria and proportion of bacterial fatty acid markers in the soil. Arachidonic acid, which reached peak levels one week after seed... |
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Palavras-chave: Orchard soil; Protozoan feeding; Streptomyces; Pseudomonas; Fatty acid markers. |
| Ano: 2006 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/143 |
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| Sousa,Carla da Silva; Soares,Ana Cristina Fermino; Garrido,Marlon da Silva; Almeida,Gabriela Maria Carneiro de Oliveira. |
| Este trabalho teve como objetivo avaliar o efeito de seis isolados de estreptomicetos na mortalidade e eclosão de juvenis de segundo estádio (J2) de Meloidogyne incognita e no controle da meloidoginose em mudas de tomateiro. Foi montado um bioensaio em placas tipo Elisa, sendo adicionados em cada célula, 200 µL de metabólitos dos isolados, com 20 µL de uma suspensão com 25 juvenis de segundo estádio (J2) de M. incognita. Os metabólitos produzidos por Streptomyces griseus subsp. griseus causaram 98,2% de mortalidade dos J2 de M. incognita. Em outro bioensaio, foram adicionados 3 mL dos metabólitos em frascos de vidro, com 100 µL da suspensão contendo 25 ovos de M.incognita. O isolado N0035 de Streptomyces proporcionou 98,8% de inibição na eclosão de J2 de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Meloidogyne incognita; Lycopersicon esculentum; Streptomyces; Actinomicetos; Nematóide-das-galhas; Biocontrole. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2006001200010 |
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| Ser,Hooi-Leng; Tan,Wen-Si; Ab Mutalib,Nurul-Syakima; Yin,Wai-Fong; Chan,Kok-Gan; Goh,Bey-Hing; Lee,Learn-Han. |
| ABSTRACT As the largest genus in Actinobacteria family, Streptomyces species have the ability to synthesize numerous compounds of diverse structures with bioactivities. Streptomyces mangrovisoli MUSC 149T was previously isolated as a novel streptomycete from mangrove forest in east coast of Peninsular Malaysia. The high quality draft genome of MUSC 149T comprises 9,165,825 bp with G + C content of 72.5%. Through bioinformatics analysis, 21 gene clusters identified in the genome were associated with the production of bioactive secondary metabolites. The presence of these biosynthetic gene clusters in MUSC 149T suggests the potential exploitation of the strain for production of medically important compounds. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genome sequence; Streptomyces; Mangrove; AntiSMASH; Bioinformatics analysis. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000100013 |
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| Abou-Dobara,M.I.; Omar,N.F.. |
| Two mesophilic streptomycetes (S. violaceoruber and S. spiroverticillatus) were selected to study their Poly R-478 decolorization ability and lignocellulose solubilizing activity. Both strains were able to degrade Poly R-478 dye and ferulic acid during growth on a minimal salts medium. The Poly R-478 decolorizing activities of both strains were induced by adding different carbon sources to the culture media. S. violaceoruber could decolorize 63% of Poly R-478 after 24 h. Both strains could solubilize straw and produce acid-precipitable polymeric lignin (APPL) with different efficiency. From the major extracellular enzymes recovery of both strains on rice and wheat straw, we can predicate that the biodegradation process was partial indicating a possible... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Streptomyces; APPL; Poly-R decolorization; Ferulic acid degradation. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000400008 |
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| Santos,A.P.P.; Silva,M.D.S.; Costa,E.V.L.; Rufino,R.D.; Santos,V.A.; Ramos,C.S.; Sarubbo,L.A.; Porto,A.L.F.. |
| Surfactants are amphipathic compounds containing both hydrophilic and hydrophobic groups, capable to lower the surface or interfacial tension. Considering the advantages of the use of biosurfactants produced by microorganisms, the aim of this paper was to develop and characterize a biosurfactant produced by Streptomyces sp. DPUA1559 isolated from lichens of the Amazon region. The microorganism was cultured in a mineral medium containing 1% residual frying soybean oil as the carbon source. The kinetics of biosurfactant production was accompanied by reducing the surface tension of the culture medium from 60 to values around 27.14 mN/m, and by the emulsification index, which showed the efficiency of the biosurfactant as an emulsifier of hydrophobic compounds.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biosurfactant; Surface tension; Emulsification; Streptomyces; Soybean frying oil. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2018000200606 |
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| Registros recuperados: 24 | |
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