| Literature DB >> 3096955 |
H S Houng, A R Lynn, B P Rosen.
Abstract
Calcium transport was investigated in membrane vesicles prepared from the oral bacterium Streptococcus sanguis. Procedures were devised for the preparation of membrane vesicles capable of accumulating 45Ca2+. Uptake was ATP dependent and did not require a proton motive force. Calcium transport in these vesicles was compared with 45Ca2+ accumulation in membrane vesicles from Streptococcus faecalis and Escherichia coli. The data support the existence of an ATP-driven calcium pump in S. sanguis similar to that in S. faecalis. This pump, which catalyzes uptake into membrane vesicles, would be responsible for extrusion of calcium from intact cells.Entities:
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Year: 1986 PMID: 3096955 PMCID: PMC213593 DOI: 10.1128/jb.168.2.1040-1044.1986
Source DB: PubMed Journal: J Bacteriol ISSN: 0021-9193 Impact factor: 3.490