ATP-driven calcium transport in membrane vesicles of Streptococcus sanguis. [Streptococcus sanguis; Streptococcus faecalis; Escherichia coli]

Journal Article · Sat Nov 01 00:00:00 EST 1986 · J. Bacteriol.; (United States)

OSTI ID:7119766

Houng, H; Lynn, A R; Rosen, B P

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), Vol. 168:2
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
CALCIUM 45
UPTAKE
CALCIUM COMPOUNDS
BIOCHEMICAL REACTION KINETICS
MEMBRANE TRANSPORT
BIOLOGICAL MODELS
ATP
CATIONS
CHARGE EXCHANGE
COMPARATIVE EVALUATIONS
ESCHERICHIA COLI
HOMEOSTASIS
STREPTOCOCCUS
ALKALINE EARTH ISOTOPES
ALKALINE EARTH METAL COMPOUNDS
BACTERIA
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CALCIUM ISOTOPES
CHARGED PARTICLES
DAYS LIVING RADIOISOTOPES
EVEN-ODD NUCLEI
INTERMEDIATE MASS NUCLEI
IONS
ISOTOPES
KINETICS
MICROORGANISMS
NUCLEI
NUCLEOTIDES
ORGANIC COMPOUNDS
RADIOISOTOPES
REACTION KINETICS
550201* - Biochemistry- Tracer Techniques