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. 1977 Sep;131(3):784–788. doi: 10.1128/jb.131.3.784-788.1977

Sodium ion-stimulated alpha-[1-14C]aminoisobutyric acid uptake in alkalophilic Bacillus species.

M Kitada, K Horikoshi
PMCID: PMC235531  PMID: 19419

Abstract

Alkalophilic Bacillus no. 8-1 grows well in alkaline media containing 2.5 to 5% NaCl. The uptake of alpha-aminoisobutyric acid (AIB) into the cells is stimulated by the addition of NaCl (Na+) up to a concentration of 0.2 M, but other monovalent cations such as K+, Li+, or NH4+ cannot substitute for Na+. The kinetic studies reveal that, when the Na+ concentration increases from 0.02 to 0.2 M in alkaline medium, the Km for transport decreases, whereas Vmax remains almost constant. Competition studies indicate that glycine, L-alanine, L-serine, and AIB share common carriers for the transport of the compounds into cells. Other alkalophilic bacteria are also found to require Na+ for the uptake of AIB into the cells.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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