Multidrug Resistance Protein 1 Definition

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Multidrug Resistance Protein 1: A 170 kD transmembrane glycoprotein from the superfamily of ATP-BINDING CASSETTE TRANSPORTERS. It serves as an ATP-dependent efflux pump for a variety of chemicals, including many ANTINEOPLASTIC AGENTS. Overexpression of this glycoprotein is associated with multidrug resistance (see DRUG RESISTANCE, MULTIPLE).

Synonym: sub-family b, member 1 atp-binding cassette, mdr1 protein, pgy 1 protein.