Rat Multidrug Resistance Associated Protein 1 (ABCC1) Protein

Background

ABCC1, also known as multidrug resistance-associated protein 1 (MRP1), is a transmembrane ATP-binding cassette transporter that effluxes a wide range of substrates, including drugs, xenobiotics, and endogenous molecules such as glutathione, leukotrienes, and conjugated metabolites. It is highly expressed in barrier tissues, such as the blood-brain barrier, lungs, and liver, where it protects cells by exporting potentially toxic compounds. ABCC1 plays a key role in multidrug resistance, as its overexpression in cancer cells reduces the efficacy of chemotherapeutic agents by actively transporting them out of cells. Structurally, ABCC1 contains two transmembrane domains and two ATP-binding domains that enable ATP-driven substrate transport. Dysregulation of ABCC1 activity is implicated in various pathological conditions, including drug resistance, inflammation, and oxidative stress, making it a target for therapeutic intervention in oncology and pharmacology.