ATP-driven calcium transport in membrane vesicles of Streptococcus sanguis. [Streptococcus sanguis; Streptococcus faecalis; Escherichia coli]
Journal Article
·
· J. Bacteriol.; (United States)
OSTI ID:7119766
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 accumulation /sup 45/Ca/sup 2 +/. Uptake was ATP dependent and did not require a proton motive force. Calcium transport in these vesicles was compared with /sup 45/Ca/sup 2 +/ 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.
- Research Organization:
- Univ. of Maryland School of Medicine, Baltimore
- OSTI ID:
- 7119766
- Journal Information:
- J. Bacteriol.; (United States), Journal Name: J. Bacteriol.; (United States) Vol. 168:2; ISSN JOBAA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
550201* -- Biochemistry-- Tracer Techniques
59 BASIC BIOLOGICAL SCIENCES
ALKALINE EARTH ISOTOPES
ALKALINE EARTH METAL COMPOUNDS
ATP
BACTERIA
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOCHEMICAL REACTION KINETICS
BIOLOGICAL MODELS
CALCIUM 45
CALCIUM COMPOUNDS
CALCIUM ISOTOPES
CATIONS
CHARGE EXCHANGE
CHARGED PARTICLES
COMPARATIVE EVALUATIONS
DAYS LIVING RADIOISOTOPES
ESCHERICHIA COLI
EVEN-ODD NUCLEI
HOMEOSTASIS
INTERMEDIATE MASS NUCLEI
IONS
ISOTOPES
KINETICS
MEMBRANE TRANSPORT
MICROORGANISMS
NUCLEI
NUCLEOTIDES
ORGANIC COMPOUNDS
RADIOISOTOPES
REACTION KINETICS
STREPTOCOCCUS
UPTAKE
59 BASIC BIOLOGICAL SCIENCES
ALKALINE EARTH ISOTOPES
ALKALINE EARTH METAL COMPOUNDS
ATP
BACTERIA
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOCHEMICAL REACTION KINETICS
BIOLOGICAL MODELS
CALCIUM 45
CALCIUM COMPOUNDS
CALCIUM ISOTOPES
CATIONS
CHARGE EXCHANGE
CHARGED PARTICLES
COMPARATIVE EVALUATIONS
DAYS LIVING RADIOISOTOPES
ESCHERICHIA COLI
EVEN-ODD NUCLEI
HOMEOSTASIS
INTERMEDIATE MASS NUCLEI
IONS
ISOTOPES
KINETICS
MEMBRANE TRANSPORT
MICROORGANISMS
NUCLEI
NUCLEOTIDES
ORGANIC COMPOUNDS
RADIOISOTOPES
REACTION KINETICS
STREPTOCOCCUS
UPTAKE