Abstract
Yeast membrane vesicles are formed when packed yeast are ground manually in a porcelain mortar and pestle with glass beads (0.2 mm diameter). These vesicles can be separated from the other components of the grinding mixture by a combination of centrifugation steps and elution from a column of the same glass beads (0.2 mm diameter). Isolated vesicles are osmotically sensitive, contain cytoplasmic components, and have energy-independent transport function. They are unable to metabolize glucose, but have respiratory function which is thought to be associated with intravesicular mitochondria. Invertase and oligomycin-insensitive adenosine triphosphatase are present in lysed vesicle preparations, and the appropriateness of these enzyme activities as membrane markers is discussed.
MeSH Terms
Adenosine Triphosphatases/antagonists & inhibitors
Amino Acids/metabolism
Cell Fractionation
Cell Membrane/analysis,drug effects,enzymology,metabolism
Electron Transport Complex IV/analysis
Galactose/metabolism
Glucose/metabolism
Inclusion Bodies/analysis,drug effects,enzymology,metabolism
Microscopy, Phase-Contrast
Mitochondria/metabolism
Oligomycins/pharmacology
Osmotic Fragility
Oxygen Consumption
Potassium Chloride/pharmacology
Saccharomyces/analysis,cytology,drug effects,enzymology,metabolism
Sucrase/analysis
Chemicals
Amino Acids
Oligomycins
Potassium Chloride
Electron Transport Complex IV
Sucrase
Adenosine Triphosphatases
Glucose
Galactose
Authors & Affiliations
2 authors, click to expand affiliations / ORCID
Christensen M S
Cirillo V P
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24 references, click to expand
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