Data/hora: 23/09/2024 04:47:47

Biblioteca(s): 	Embrapa Meio Ambiente.	
Data corrente: 	01/11/2018	
Data da última atualização: 	01/11/2018	
Autoria: 	SILVA, T. R. e; DUARTE, A. W. F.; PASSARINI, M. R. Z.; RUIZ, A. L. T. G.; FRANCO, C. H.; MORAES, C. B.; MELO, I. S. de; RODRIGUES, R. A.; FANTINATTI-GARBOGGINI, F.; OLIVEIRA, V. M.	
Afiliação: 	TIAGO RODRIGUES E SILVA, IB-UNICAMP; ALYSSON WAGNER FERNANDES DUARTE, UFAL; MICHEL RODRIGO ZAMBRANO PASSARINI, UFAL; ANA LUCIA TASCA GOIS RUIZ, FCF-UNICAMP; CAIO HADDAD FRANCO, CNPEM; CAROLINA BORSOI MORAES, CNPEM; ITAMAR SOARES DE MELO, CNPMA; RODNEY ALEXANDRE RODRIGUES, CPQBA-UNICAMP; FABIANA FANTINATTI-GARBOGGINI, CPQBA-UNICAMP.	
Título: 	Bacteria from Antarctic environments: diversity and detection of antimicrobial, antiproliferative, and antiparasitic activities.	
Ano de publicação: 	2018	
Fonte/Imprenta: 	Polar Biology, v. 41, n. 7, p. 1505-1519, 2018.	
ISSN: 	1432-2056	
DOI: 	https://doi.org/10.1007/s00300-018-2300-y	
Idioma: 	Inglês	
Conteúdo: 	Abstract: Microorganisms dominate most of Antarctic ecosystems and play a crucial role in their functioning. They are called extremophilic microorganisms with unique and versatile metabolic properties with possible biotechnological applications in several areas. The aim of the present study was to identify psychrotolerant microorganisms from Antarctic continent samples and to screen them for antimicrobial effects. Phylogenetic analyses revealed that most isolates were closely related to recognized species, including those recovered previously from Antarctica, which belonged to the major phyla Firmicutes, Bacteroidetes, Actinobacteria, and Proteobacteria (classes Alpha, Beta, and Gammaproteobacteria). A total of 326 bacterial isolates, distributed in 39 different genera, were recovered and identified based on sequencing of the 16S rRNA gene. The main representative genera were Arthrobacter, Psychrobacter, Pseudoalteromonas, and Rhodococcus. Antimicrobial screening revealed fifteen isolates capable of inhibiting growth of at least one of the indicator strains: Escherichia coli, Micrococcus luteus, Staphylococcus aureus, Bacillus subtilis, and Candida albicans. One psychrotolerant bacterium, Pseudomonas sp. isolate 99, showed a broad antimicrobial range, in addition to antiproliferative and antiparasitic activity. Overall, the small number of antibiotic-producing isolates obtained and the weakness of their inhibition halos corroborated previous findings suggesting that cold-loving bacteria from Antarctica are not as good as their relatives from mesophilic environments for antimicrobial prospecting. Nonetheless, antiproliferative and antiparasitic results observed are promising and suggest that there is an untapped wealth in Antarctic environments for bioprospecting compounds with pharmaceutical potential application.	
Palavras-Chave: 	16S rRNA genes; Bioprospecting; Cold environments.	
Thesagro: 	Bactéria; Biodiversidade.	
Thesaurus Nal: 	Antarctica; Antibiotics; Bacillus (bacteria); Bioactive compounds; Pseudomonas.	
Categoria do assunto: 	S Ciências Biológicas	
Registro original: 	Embrapa Meio Ambiente (CNPMA)	
Exemplares: 	CNPMA - (16186-1) - UPC - AP - DD -  -  -  - DIS