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https://repositorio.ufpa.br/jspui/handle/2011/4094
Tipo: | Artigo de Periódico |
Data do documento: | Jan-2012 |
Autor(es): | SANTANA, Priscila di Paula Bessa GHILARDI JUNIOR, Rubens ALVES, Claudio Nahum SILVA, Jeronimo Lameira MCCULLOCH, John Anthony SCHNEIDER, Maria Paula Cruz SILVA, Artur Luiz da Costa da |
Título: | Diversity and three-dimensional structures of the alpha Mcr of the methanogenic Archaea from the anoxic region of Tucuruí Lake, in Eastern Brazilian Amazonia |
Citar como: | SANTANA, Priscila Bessa, et al. Diversity and three-dimensional structures of the alpha Mcr of the methanogenic Archaea from the anoxic region of Tucuruí Lake, in Eastern Brazilian Amazonia. Genetics and Molecular Biology, São Paulo, v. 35, n. 1, p. 126-133, 2012, Epub 20 jan. 2012. Disponível em: <http://www.scielo.br/pdf/gmb/v35n1/2011-055.pdf>. Acesso em: 06 ago. 2013. <http://dx.doi.org/10.1590/S1415-47572012005000004>. |
Abstract: | Methanogenic archaeans are organisms of considerable ecological and biotechnological interest that produce methane through a restricted metabolic pathway, which culminates in the reaction catalyzed by the Methyl-coenzyme M reductase (Mcr) enzyme, and results in the release of methane. Using a metagenomic approach, the gene of the a subunit of mcr (mcrα) was isolated from sediment sample from an anoxic zone, rich in decomposing organic material, obtained from the Tucuruí hydroelectric dam reservoir in eastern Brazilian Amazonia. The partial nucleotide sequences obtained were 83 to 95% similar to those available in databases, indicating a low diversity of archaeans in the reservoir. Two orders were identified -the Methanomicrobiales, and a unique Operational Taxonomic Unit (OTU) forming a clade with the Methanosarcinales according to low bootstrap values. Homology modeling was used to determine the three-dimensional (3D) structures, for this the partial nucleotide sequence of the mcrα were isolated and translated on their partial amino acid sequences. The 3D structures of the archaean mcrα observed in the present study varied little, and presented approximately 70% identity in comparison with the mcrα of Methanopyrus klanderi. The results demonstrated that the community of methanogenic archaeans of the anoxic C1 region of the Tucurui reservoir is relatively homogeneous. |
Palavras-chave: | Archaea Metil-coenzima M redutase Modelagem por homologia Lago de Tucuruí - PA Tucuruí - PA Pará - Estado Amazônia brasileira |
ISSN: | 1415-4757 |
Tipo de Acesso: | Acesso Aberto |
Aparece nas coleções: | Artigos Científicos - ICB |
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Artigo_DiversityThreeDimensional.pdf | 1,9 MB | Adobe PDF | Visualizar/Abrir |
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