Glycine betaine and potassium ion are the major compatible solutes in the extremely halophilic methanogen Methanohalophilus strain Z7302.
AUTOR(ES)
Lai, M C
RESUMO
Methanohalophilus strain Z7302 was previously isolated from a hypersaline environment and grows over a range of NaCl concentrations from 1.7 to 4.4 M. We examined the relationships between cell growth rate, cell volume, and intracellular solute concentrations with increasing salinity. This extremely halophilic methanogen synthesized three zwitterionic compounds, beta-glutamine, N epsilon-acetyl-beta-lysine, and glycine betaine, and also accumulated potassium ion as compatible solutes to balance the external and internal osmotic pressures. Potassium and glycine betaine were the predominant compatible solutes when Methanohalophilus strain Z7302 was grown at high external NaCl concentrations and approached intracellular levels of 3 and 4 M, respectively.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=207447Documentos Relacionados
- Glycine Betaine Transport in the Obligate Halophilic Archaeon Methanohalophilus portucalensis
- Role for Compatible Solutes Glycine Betaine and l-Carnitine in Listerial Barotolerance
- Regulatory Factors Associated with Synthesis of the Osmolyte Glycine Betaine in the Halophilic Methanoarchaeon Methanohalophilus portucalensis
- Composition, Variation, and Dynamics of Major Osmotic Solutes in Methanohalophilus Strain FDF1
- Distribution of compatible solutes in the halophilic methanogenic archaebacteria.
