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Cobalt and sodium requirements for methanogenesis in washed cells of Methanosaeta concilii

Par Conseil national de recherches du Canada

DOITrouver le DOI : https://doi.org/10.1139/m91-016
AuteurRechercher : 1; Rechercher : 1
Affiliation
  1. Conseil national de recherches du Canada
FormatTexte, Article
Résumé
Methanosaeta concilii GP6 lost methanogenic activity upon thorough washing of the cells with an anaerobic buffer. Methane production from acetate could be restored by supplementing the washed cell suspension with spent growth medium, and to a lesser degree (65–70% of the rate obtained with spent medium) by the coaddition of NaCl and CoCl2. The latter reactivation had an apparent Km for CoCl2 of 5.6 μM in the presence of 40 mM NaCl, and an apparent Km for NaCl of 2.5 mM in the presence of 5 μM CoCl2. The requirement for NaCl could be met by LiCl but only partially by MgCl2, CaCl2, or NiCl2. Methylcobalamin could substitute for CoCl2. Severe inhibition of methanogenesis in unwashed GP6 cells caused by 5 μM propyl iodide and the role of methylcobalamin in regeneration of methane production in washed cells suggest the involvement of corrinoids in the methane pathway of the aceticlastic Methanosaeta concilii. This represents the first documentation for cobalt/methylcobalamin and sodium requirements for methanogenesis in Methanosaeta concilii. Key words: cobalt, sodium, methylcobalamin, methanogenesis, Methanosaeta concilii.
Date de publication
Dans
  • Canadian Journal of Microbiology 37 (1991) : 110–115.
Langueanglais
Numéro du CNRCPATEL1991A
NRCC 31928
Numéro NPARC9365239
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Identificateur de l’enregistrementa9cc3fdb-bcc6-4fc2-a1ea-3f335a42c5ef
Enregistrement créé2009-07-10
Enregistrement modifié2020-03-17
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