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Partial purification of dopamine D2 receptors using lectin affinity columns
Bioscience Reports
|April 1, 1985
Summary
The dopamine D2 receptor, identified by [3H]spiperone binding, was purified using wheat germ agglutinin affinity chromatography. This confirmed the dopamine D2 receptor is a glycoprotein, crucial for understanding neurotransmitter function.
Area of Science:
- Neuroscience
- Biochemistry
- Molecular Biology
Background:
- Dopamine D2 receptors play a critical role in neurotransmission.
- Understanding the molecular structure of these receptors is essential for pharmacology.
Purpose of the Study:
- To investigate the biochemical nature of the dopamine D2 receptor.
- To determine if the dopamine D2 receptor possesses glycosylation.
Main Methods:
- Solubilization of dopamine D2 receptors from bovine caudate nucleus using cholate/sodium chloride.
- Affinity purification using wheat germ agglutinin immobilized on agarose.
- Elution with N-acetylglucosamine.
Main Results:
- Wheat germ agglutinin specifically bound to solubilized dopamine D2 receptors.
- N-acetylglucosamine effectively eluted the bound receptors.
- The purification process yielded a sevenfold enrichment of receptors.
- Pharmacological properties remained unchanged post-purification.
Conclusions:
- The dopamine D2 receptor is a glycoprotein.
- This finding has implications for receptor function and drug development.