Identification of the Apical Membrane-targeting Signal of the Multidrug Resistance-associated Protein 2 (MRP2/cMOAT)
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Harris, Matthew; Kuwano, Michihiko; Webb, Malcolm; Board, Philip
Description
The human canalicular multispecific organic anion transporter (cMOAT), known as the multidrug resistance-associated protein 2 (MRP2), is normally expressed in the liver and to a lesser extent in the kidney proximal tubules. In these tissues MRP2 specifically localizes to the apical membrane. The construction of MRP2 fused to the green fluorescent protein, and subsequent site-directed mutagenesis enabled the identification of a targeting signal in MRP2 that is responsible for its apical...[Show more]
dc.contributor.author | Harris, Matthew | |
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dc.contributor.author | Kuwano, Michihiko | |
dc.contributor.author | Webb, Malcolm | |
dc.contributor.author | Board, Philip | |
dc.date.accessioned | 2015-12-13T23:20:42Z | |
dc.date.available | 2015-12-13T23:20:42Z | |
dc.identifier.issn | 0021-9258 | |
dc.identifier.uri | http://hdl.handle.net/1885/90826 | |
dc.description.abstract | The human canalicular multispecific organic anion transporter (cMOAT), known as the multidrug resistance-associated protein 2 (MRP2), is normally expressed in the liver and to a lesser extent in the kidney proximal tubules. In these tissues MRP2 specifically localizes to the apical membrane. The construction of MRP2 fused to the green fluorescent protein, and subsequent site-directed mutagenesis enabled the identification of a targeting signal in MRP2 that is responsible for its apical localization in polarized cells. The specific apical localization of MRP2 is due to a C-terminal tail that is not present in the basolaterally targeted MRP1. Deletion of three amino acids from the C-terminal of MRP2 (δMRP2) causes the protein to be localized predominantly in the basolateral membrane in polarized Madin-Darby canine kidney cells. Interestingly, MRP2 expressed in a mouse leukemia cell line (L1210 cells) predominantly accumulates intracellularly with minimal cell membrane localization. In contrast, δMRP2 was shown to predominantly localize in the cell membrane in L1210 cells. Increased transport of 2,4-dinitrophenyl glutathione from L1210 cells expressing δMRP2 showed that the re-targeted protein retains its normal function. | |
dc.publisher | American Society for Biochemistry and Molecular Biology Inc | |
dc.source | Journal of Biological Chemistry | |
dc.subject | Keywords: Amino acids; Biochemistry; Cell membranes; Drug products; Fluorescence; Tissue; Proximal tubules; Proteins; 2,4 dinitrophenylglutathione; glutathione derivative; green fluorescent protein; multidrug resistance protein 2; unclassified drug; anion transport | |
dc.title | Identification of the Apical Membrane-targeting Signal of the Multidrug Resistance-associated Protein 2 (MRP2/cMOAT) | |
dc.type | Journal article | |
local.description.notes | Imported from ARIES | |
local.description.refereed | Yes | |
local.identifier.citationvolume | 276 | |
dc.date.issued | 2001 | |
local.identifier.absfor | 110106 - Medical Biochemistry: Proteins and Peptides (incl. Medical Proteomics) | |
local.identifier.ariespublication | MigratedxPub21300 | |
local.type.status | Published Version | |
local.contributor.affiliation | Harris, Matthew, College of Medicine, Biology and Environment, ANU | |
local.contributor.affiliation | Kuwano, Michihiko, Kyushu University | |
local.contributor.affiliation | Webb, Malcolm, College of Medicine, Biology and Environment, ANU | |
local.contributor.affiliation | Board, Philip, College of Medicine, Biology and Environment, ANU | |
local.bibliographicCitation.issue | 24 | |
local.bibliographicCitation.startpage | 20676 | |
local.bibliographicCitation.lastpage | 20881 | |
local.identifier.doi | 10.1074/jbc.M010566200 | |
dc.date.updated | 2015-12-12T09:04:14Z | |
local.identifier.scopusID | 2-s2.0-0035877805 | |
Collections | ANU Research Publications |
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