Título
Activation of Methanogenesis by Cadmium in the Marine Archaeon Methanosarcina acetivorans.
Autor
Elizabeth Lira Silva
Michel Geovanni Santiago Martinez
Viridiana Hernández
Rodolfo Garcia Contreras
Rafael Moreno Sanchez
Ricardo Jasso Chavez
Nivel de Acceso
Acceso Abierto
Identificador alterno
doi: 10.1371/journal.pone.0048779
Materias
Ecología - ([PLOS ONE (1932-6203) vol. 7(11), 1-8 (2012)]) Metanógenos - ([PLOS ONE (1932-6203) vol. 7(11), 1-8 (2012)]) Cadmio - ([PLOS ONE (1932-6203) vol. 7(11), 1-8 (2012)]) Metano - ([PLOS ONE (1932-6203) vol. 7(11), 1-8 (2012)]) Metales pesados - ([PLOS ONE (1932-6203) vol. 7(11), 1-8 (2012)]) Contaminación del agua - ([PLOS ONE (1932-6203) vol. 7(11), 1-8 (2012)]) BIOLOGÍA Y QUÍMICA - (CTI)
Resumen o descripción
Methanosarcina acetivorans was cultured in the presence of CdCl(2) to determine the metal effect on cell growth and biogas production. With methanol as substrate, cell growth and methane synthesis were not altered by cadmium, whereas with acetate, cadmium slightly increased both, growth and methane rate synthesis. In cultures metabolically active, incubations for short-term (minutes) with 10 µM total cadmium increased the methanogenesis rate by 6 and 9 folds in methanol- and acetate-grown cells, respectively. Cobalt and zinc but not copper or iron also activated the methane production rate. Methanogenic carbonic anhydrase and acetate kinase were directly activated by cadmium. Indeed, cells cultured in 100 µM total cadmium removed 41-69% of the heavy metal from the culture and accumulated 231-539 nmol Cd/mg cell protein. This is the first report showing that (i) Cd(2+) has an activating effect on methanogenesis, a biotechnological relevant process in the bio-fuels field; and (ii) a methanogenic archaea is able to remove a heavy metal from aquatic environments.
Editor
Public Library of Science
Fecha de publicación
2012
Tipo de publicación
Artículo
Versión de la publicación
Versión publicada
Recurso de información
Formato
application/pdf
Fuente
PLOS ONE (1932-6203) vol. 7(11), 1-8 (2012)
Idioma
Inglés
Relación
https://www.ncbi.nlm.nih.gov/pmc/issues/215208/
Cobertura
US
Repositorio Orígen
Repositorio Institucional de la Facultad de Medicina,UNAM.Departamento de Microbiologia y Parasitologia
Descargas
0