Data/hora: 16/06/2024 19:27:51

Provedor de dados: 	74	
País: 	Brazil	
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	
Autores: 	Santana,Priscila Bessa; Ghilardi Junior,Rubens; Alves,Claudio Nahum; Silva,Jeronimo Lameira; McCulloch,John Anthony; Schneider,Maria Paula Cruz; Silva,Artur da Costa da.	
Data: 	2012-01-01	
Ano: 	2012	
Palavras-chave: 	Amazonian; Archaea; Diversity; Methyl-coenzyme M reductase; Mcrα; Homology modeling.	
Resumo: 	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.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000100018	
Editor: 	Sociedade Brasileira de Genética	
Relação: 	10.1590/S1415-47572012005000004	
Formato: 	text/html	
Fonte: 	Genetics and Molecular Biology  v.35 n.1 2012	
Fonte: 	info:eu-repo/semantics/openAccess