Cloning of AtMRP1, an Arabidopsis thaliana cDNA encoding a homologue of the mammalian multidrug resistance-associated protein.

A cDNA encoding a putative ATP-binding cassette (ABC) transporter from Arabidopsis was cloned and sequenced based on an EST clone homologous to ABC sequences in other species. The cDNA is 5.5 kb long and contains an ORF encoding a 1623 amino acids protein. This sequence is the first MRP-like protein found in plants.