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Cyanobacterial nitrogenases: phylogenetic diversity, regulation and functional predictions Genet. Mol. Biol.
Esteves-Ferreira,Alberto A.; Cavalcanti,João Henrique Frota; Vaz,Marcelo Gomes Marçal Vieira; Alvarenga,Luna V.; Nunes-Nesi,Adriano; Araújo,Wagner L..
Abstract Cyanobacteria is a remarkable group of prokaryotic photosynthetic microorganisms, with several genera capable of fixing atmospheric nitrogen (N2) and presenting a wide range of morphologies. Although the nitrogenase complex is not present in all cyanobacterial taxa, it is spread across several cyanobacterial strains. The nitrogenase complex has also a high theoretical potential for biofuel production, since H2 is a by-product produced during N2 fixation. In this review we discuss the significance of a relatively wide variety of cell morphologies and metabolic strategies that allow spatial and temporal separation of N2 fixation from photosynthesis in cyanobacteria. Phylogenetic reconstructions based on 16S rRNA and nifD gene sequences shed light on...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cyanobacteria; Evolution; Hydrogen; Nitrogen fixation; Molecular phylogeny.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572017000200261
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Thermostability of xylanolytic enzymes produced by Lentinula edodes UFV70 BJM
Ribeiro,Liliane Fraga Costa; Vaz,Marcelo Gomes Marçal Vieira; Chaves-Alves,Virgínia Maria; Vanetti,Maria Cristina Dantas; Kasuya,Maria Catarina Megumi; Passos,Flávia Maria Lopes; Nascimento,Antônio Galvão do.
Xylanolytic enzymes produced by Lentinula edodes UFV70, cultivated in eucalyptus sawdust/rice bran medium, were stable at 50, 60 and 65ºC for 21 hours, losing only 15-25% activity. Fungus incubation at 50ºC for 12 hours and at 65ºC for 24 hours increased the amount of xylose produced.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Xylanase; Thermostability; Lentinula edodes; Xylose.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000100021
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