Abstract
The cardiac glycoside, ouabain, inhibits alkali-cation transport in HeLa cells. It binds to 0.75 x 10(6) sites per cell, and the half-time for its dissociation is 16 hr. After partial blockade by ouabain, the cell generates new ouabain-binding sites, with total restoration of transport in 10% of a cell cycle( approximately 3 hr). This recovery requires protein synthesis and appears to be a response to altered cell-electrolyte content, since growth of cells in media with low K(+) concentration enhances the titer of the transport enzyme in a fashion similar to the effect of ouabain. Totally blocked cells do not recover.
MeSH Terms
Animals
Binding Sites
Biological Transport/drug effects
Cell Line
Cells, Cultured
Cycloheximide/pharmacology
HeLa Cells/drug effects,growth & development,metabolism
Kinetics
Leucine/metabolism
Mice
Neoplasm Proteins/biosynthesis
Ouabain/metabolism,pharmacology
Potassium/pharmacology
Radioisotopes
Rubidium/metabolism
Tritium
Chemicals
Neoplasm Proteins
Radioisotopes
Tritium
Ouabain
Cycloheximide
Leucine
Rubidium
Potassium
Authors & Affiliations
2 authors, click to expand affiliations / ORCID
Vaughan G L
Cook J S
References (13)
13 references, click to expand
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