Evidence for a magnesium pump in Bacillus cereus T.
J Bacteriol
; 105(1): 150-5, 1971 Jan.
Article
in En
| MEDLINE
| ID: mdl-4993319
ABSTRACT
Unlike Escherichia coli, Bacillus cereus T appears to accumulate Mg(2+) in its cell sap against a concentration gradient. Over a range of Mg(2+) in the growth medium from 5 x 10(-5) to 1.35 x 10(-2)m, the concentration of Mg(2+) in the cell sap of B. cereus T was maintained at about 6 x 10(-3)m, and ribosome-bound Mg(2+) and spermidine, as well as the spermidine concentration in the cell sap, appear to be unaffected by the concentration of Mg(2+) in the growth medium. Inhibition of growth of E. coli by streptomycin is progressively reversed by increasing the concentration of Mg(2+) in the growth medium above 5 mm. The finding that similar increases of Mg(2+) in the growth medium did not reverse the inhibition of B. cereus T is also consistent with the conclusion that B. cereus T, unlike E. coli, accumulates Mg(2+) to a constant concentration in its cell sap.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Bacillus cereus
Language:
En
Journal:
J Bacteriol
Year:
1971
Document type:
Article