The multidrug resistance (mdr1) gene product functions as an ATP channel.
basic_science · Level V
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- Record sourced from PubMed, PMID 7678345.
- Also identified by PMC identifier 45650.
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Abstract
The multidrug resistance (mdr1) gene product, P-glycoprotein, is responsible for the ATP-dependent extrusion of a variety of compounds, including chemotherapeutic drugs, from cells. The data presented here show that cells with increased levels of the P-glycoprotein release ATP to the medium in proportion to the concentration of the protein in their plasma membrane. Furthermore, measurements of whole-cell and single-channel currents with patch-clamp electrodes indicate that the P-glycoprotein serves as an ATP-conducting channel in the plasma membrane. These findings suggest an unusual role for the P-glycoprotein.
Medical subject headings
- Adenosine Triphosphate
- Drug Resistance
- Ion Channels
- Membrane Glycoproteins