Descriptions

MRP2 (Multidrug resistance-associated protein 2) is an efflux transporter for organic anions, expressed in hepatocyte canalicular membranes. It plays a role in exporting bilirubin glucuronide, a breakdown product of heme. The structural analysis of rat Mrp2 (rMrp2) reveals an autoinhibited state where the regulatory domain (R-domain) is folded within the transmembrane domain cavity, preventing substrate binding and NBD:NBD interface formation. Phosphorylation of the R-domain by intracellular kinases relieves autoinhibition, enhancing rMrp2 transport activity. The drug-bound state of rMrp2 shows two probenecid binding sites, suggesting a dynamic interplay with autoinhibition and providing insights into drug modulation of MRP2 activity.

Autoinhibitory domains (AIDs)

Target domain

320-601 (Transmembrane domain 1); 976-1260 (Transmembrane domain 2)

Relief mechanism

PTM

Assay

Structural analysis, Mutagenesis experiment

Accessory elements

No accessory elements

Autoinhibited structure

Activated structure

3 structures for Q63120

Entry ID Method Resolution Chain Position Source
8RQ3 EM 321 A A 1-1541 PDB
8RQ4 EM 345 A A 1-1541 PDB
AF-Q63120-F1 Predicted AlphaFoldDB

2 variants for Q63120

Variant ID(s) Position Change Description Diseaes Association Provenance
rs3319258154 91 G>E No EVA
rs3319262337 611 R>G No EVA

1 associated diseases with Q63120

Without disease ID

7 regional properties for Q63120

Type Name Position InterPro Accession
domain ABC transporter-like, ATP-binding domain 633 - 857 IPR003439-1
domain ABC transporter-like, ATP-binding domain 1296 - 1530 IPR003439-2
domain AAA+ ATPase domain 659 - 834 IPR003593-1
domain AAA+ ATPase domain 1322 - 1507 IPR003593-2
domain ABC transporter type 1, transmembrane domain 320 - 601 IPR011527-1
domain ABC transporter type 1, transmembrane domain 976 - 1260 IPR011527-2
conserved_site ABC transporter-like, conserved site 757 - 771 IPR017871

Functions

Description
EC Number 7.6.2.2 Linked to the hydrolysis of a nucleoside triphosphate
Subcellular Localization
  • Apical cell membrane ; Multi-pass membrane protein
  • Localized to the canalicular membrane of hepatocytes
PANTHER Family
PANTHER Subfamily
PANTHER Protein Class
PANTHER Pathway Category No pathway information available

7 GO annotations of cellular component

Name Definition
apical plasma membrane The region of the plasma membrane located at the apical end of the cell.
brush border membrane The portion of the plasma membrane surrounding the brush border.
cell surface The external part of the cell wall and/or plasma membrane.
integral component of plasma membrane The component of the plasma membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
intercellular canaliculus An extremely narrow tubular channel located between adjacent cells. An instance of this is the secretory canaliculi occurring between adjacent parietal cells in the gastric mucosa of vertebrates.
intracellular canaliculus An apical plasma membrane part that forms a narrow enfolded luminal membrane channel, lined with numerous microvilli, that appears to extend into the cytoplasm of the cell. A specialized network of intracellular canaliculi is a characteristic feature of parietal cells of the gastric mucosa in vertebrates.
membrane A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.

8 GO annotations of molecular function

Name Definition
ABC-type glutathione S-conjugate transporter activity Catalysis of the reaction: ATP + H2O + glutathione S-conjugate(in) -> ADP + phosphate + glutathione S-conjugate(out).
ABC-type xenobiotic transporter activity Catalysis of the reaction: ATP + H2O + xenobiotic(in) = ADP + phosphate + xenobiotic(out).
ATP binding Binding to ATP, adenosine 5'-triphosphate, a universally important coenzyme and enzyme regulator.
ATPase-coupled transmembrane transporter activity Primary active transporter of a solute across a membrane, via the reaction: ATP + H2O = ADP + phosphate, to directly drive the transport of a substance across a membrane. The transport protein may be transiently phosphorylated (P-type transporters), or not (ABC-type transporters and other families of transporters). Primary active transport occurs up the solute's concentration gradient and is driven by a primary energy source.
bilirubin transmembrane transporter activity Enables the transfer of bilirubin from one side of a membrane to the other. Bilirubin is a linear tetrapyrrole produced in the reticuloendothelial system from biliverdin and transported to the liver as a complex with serum albumin. In the liver, bilirubin is converted to bilirubin bisglucuronide, which is excreted in the bile.
organic anion transmembrane transporter activity Enables the transfer of organic anions from one side of a membrane to the other. Organic anions are atoms or small molecules with a negative charge which contain carbon in covalent linkage.
protein domain specific binding Binding to a specific domain of a protein.
xenobiotic transmembrane transporter activity Enables the directed movement of a xenobiotic from one side of a membrane to the other. A xenobiotic is a compound foreign to the organim exposed to it. It may be synthesized by another organism (like ampicilin) or it can be a synthetic chemical.

43 GO annotations of biological process

Name Definition
antibiotic metabolic process The chemical reactions and pathways involving an antibiotic, a substance produced by or derived from certain fungi, bacteria, and other organisms, that can destroy or inhibit the growth of other microorganisms.
benzylpenicillin metabolic process The chemical reactions and pathways involving benzylpenicillin.
bile acid and bile salt transport The directed movement of bile acid and bile salts into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
bile acid signaling pathway The series of molecular signals initiated by bile acid binding to its receptor, and ending with the regulation of a downstream cellular process, e.g. transcription.
bilirubin transport The directed movement of bilirubin into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
canalicular bile acid transport Enables the transfer of bile acid from one side of a hepatocyte plasma membrane into a bile canaliculus. Bile canaliculi are the thin tubes formed by hepatocyte membranes. Bile acids are any of a group of steroid carboxylic acids occurring in bile, where they are present as the sodium salts of their amides with glycine or taurine.
cellular chloride ion homeostasis Any process involved in the maintenance of an internal steady state of chloride ions at the level of a cell.
cellular response to dexamethasone stimulus Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a dexamethasone stimulus.
cellular response to interleukin-1 Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of an interleukin-1 stimulus.
cellular response to interleukin-6 Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of an interleukin-6 stimulus.
cellular response to lipopolysaccharide Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a lipopolysaccharide stimulus; lipopolysaccharide is a major component of the cell wall of gram-negative bacteria.
cellular response to tumor necrosis factor Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a tumor necrosis factor stimulus.
cellular response to xenobiotic stimulus Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a stimulus from a xenobiotic, a compound foreign to the organism exposed to it. It may be synthesized by another organism (like ampicilin) or it can be a synthetic chemical.
detoxification of mercury ion Any process that reduce or remove the toxicity of mercuric ion. These include transport of mercury away from sensitive areas and to compartments or complexes whose purpose is sequestration of mercury ion and/or reduction of mercury ion (Hg) to metallic mercury (Hg).
female pregnancy The set of physiological processes that allow an embryo or foetus to develop within the body of a female animal. It covers the time from fertilization of a female ovum by a male spermatozoon until birth.
inflammatory response The immediate defensive reaction (by vertebrate tissue) to infection or injury caused by chemical or physical agents. The process is characterized by local vasodilation, extravasation of plasma into intercellular spaces and accumulation of white blood cells and macrophages.
leukotriene transport The directed movement of leukotrienes into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore. Leukotrienes are linear C20 endogenous metabolites of arachidonic acid (icosa-5,8,11,14-tetraenoic acid) containing a terminal carboxy function and four or more double bonds (three or more of which are conjugated) as well as other functional groups.
mercury ion transport The directed movement of mercury (Hg) ions into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
negative regulation of gene expression Any process that decreases the frequency, rate or extent of gene expression. Gene expression is the process in which a gene's coding sequence is converted into a mature gene product (protein or RNA).
organic anion transport The directed movement of organic anions into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore. Organic anions are atoms or small molecules with a negative charge which contain carbon in covalent linkage.
prostaglandin transport The directed movement of prostaglandins into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
regulation of bile acid secretion Any process that modulates the frequency, rate or extent of the controlled release of bile acid from a cell or a tissue.
regulation of gene expression Any process that modulates the frequency, rate or extent of gene expression. Gene expression is the process in which a gene's coding sequence is converted into a mature gene product (protein or RNA).
response to 17alpha-ethynylestradiol Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a 17alpha-ethynylestradiol stimulus.
response to antineoplastic agent Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of an antineoplastic agent stimulus. An antineoplastic agent is a substance that inhibits or prevents the proliferation of neoplasms.
response to arsenic-containing substance Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of an arsenic stimulus from compounds containing arsenic, including arsenates, arsenites, and arsenides.
response to estradiol Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of stimulus by estradiol, a C18 steroid hormone hydroxylated at C3 and C17 that acts as a potent estrogen.
response to estrogen Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of stimulus by an estrogen, C18 steroid hormones that can stimulate the development of female sexual characteristics.
response to glucagon Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a glucagon stimulus.
response to heat Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a heat stimulus, a temperature stimulus above the optimal temperature for that organism.
response to lipopolysaccharide Any process that results in a change in state or activity of an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a lipopolysaccharide stimulus; lipopolysaccharide is a major component of the cell wall of gram-negative bacteria.
response to organic cyclic compound Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of an organic cyclic compound stimulus.
response to oxidative stress Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of oxidative stress, a state often resulting from exposure to high levels of reactive oxygen species, e.g. superoxide anions, hydrogen peroxide (H2O2), and hydroxyl radicals.
response to steroid hormone Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a steroid hormone stimulus.
response to xenobiotic stimulus Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a stimulus from a xenobiotic, a compound foreign to the organim exposed to it. It may be synthesized by another organism (like ampicilin) or it can be a synthetic chemical.
thyroid hormone transport The directed movement of thyroid hormone into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
transepithelial transport The directed movement of a substance from one side of an epithelium to the other.
transmembrane transport The process in which a solute is transported across a lipid bilayer, from one side of a membrane to the other.
xenobiotic catabolic process The chemical reactions and pathways resulting in the breakdown of a xenobiotic compound, a compound foreign to the organim exposed to it. It may be synthesized by another organism (like ampicilin) or it can be a synthetic chemical.
xenobiotic detoxification by transmembrane export across the plasma membrane A process that reduces or removes the toxicity of a xenobiotic by exporting it outside the cell.
xenobiotic export from cell The directed movement of a xenobiotic from a cell, into the extracellular region. A xenobiotic is a compound foreign to the organim exposed to it. It may be synthesized by another organism (like ampicilin) or it can be a synthetic chemical.
xenobiotic transmembrane transport The process in which a xenobiotic, a compound foreign to the organim exposed to it, is transported across a membrane. It may be synthesized by another organism (like ampicilin) or it can be a synthetic chemical.
xenobiotic transport across blood-brain barrier The directed movement of a xenobiotic through the blood-brain barrier.

25 homologous proteins in AiPD

UniProt AC Gene Name Protein Name Species Evidence Code
P14772 BPT1 Bile pigment transporter 1 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (Baker's yeast) PR
Q8HXQ5 ABCC1 Multidrug resistance-associated protein 1 Bos taurus (Bovine) PR
Q2QLE5 CFTR Cystic fibrosis transmembrane conductance regulator Pan troglodytes (Chimpanzee) PR
P91660 Rh5 Probable multidrug resistance-associated protein lethal(2)03659 Drosophila melanogaster (Fruit fly) PR
P13569 CFTR Cystic fibrosis transmembrane conductance regulator Homo sapiens (Human) PR
O95255 ABCC6 ATP-binding cassette sub-family C member 6 Homo sapiens (Human) PR
O15438 ABCC3 ATP-binding cassette sub-family C member 3 Homo sapiens (Human) PR
O15439 ABCC4 ATP-binding cassette sub-family C member 4 Homo sapiens (Human) PR
Q96J66 ABCC11 ATP-binding cassette sub-family C member 11 Homo sapiens (Human) PR
P33527 ABCC1 Multidrug resistance-associated protein 1 Homo sapiens (Human) PR
Q92887 ABCC2 ATP-binding cassette sub-family C member 2 Homo sapiens (Human) SS
B2RX12 Abcc3 ATP-binding cassette sub-family C member 3 Mus musculus (Mouse) PR
P26361 Cftr Cystic fibrosis transmembrane conductance regulator Mus musculus (Mouse) PR
O35379 Abcc1 Multidrug resistance-associated protein 1 Mus musculus (Mouse) PR
Q80WJ6 Abcc12 ATP-binding cassette sub-family C member 12 Mus musculus (Mouse) PR
Q8VI47 Abcc2 ATP-binding cassette sub-family C member 2 Mus musculus (Mouse) SS
Q6PQZ2 CFTR Cystic fibrosis transmembrane conductance regulator Sus scrofa (Pig) PR
Q8CG09 Abcc1 Multidrug resistance-associated protein 1 Rattus norvegicus (Rat) PR
Q6Y306 Abcc12 ATP-binding cassette sub-family C member 12 Rattus norvegicus (Rat) PR
Q00553 CFTR Cystic fibrosis transmembrane conductance regulator Macaca mulatta (Rhesus macaque) PR
Q9SKX0 ABCC13 ABC transporter C family member 13 Arabidopsis thaliana (Mouse-ear cress) PR
Q8VZZ4 ABCC6 ABC transporter C family member 6 Arabidopsis thaliana (Mouse-ear cress) PR
Q9M1C7 ABCC9 ABC transporter C family member 9 Arabidopsis thaliana (Mouse-ear cress) PR
Q9C8G9 ABCC1 ABC transporter C family member 1 Arabidopsis thaliana (Mouse-ear cress) PR
Q9C8H0 ABCC12 ABC transporter C family member 12 Arabidopsis thaliana (Mouse-ear cress) PR
10 20 30 40 50 60
MDKFCNSTFW DLSLLESPEA DLPLCFEQTV LVWIPLGFLW LLAPWQLYSV YRSRTKRSSI
70 80 90 100 110 120
TKFYLAKQVF VVFLLILAAI DLSLALTEDT GQATVPPVRY TNPILYLCTW LLVLAVQHSR
130 140 150 160 170 180
QWCVRKNSWF LSLFWILSVL CGVFQFQTLI RALLKDSKSN MAYSYLFFVS YGFQIVLLIL
190 200 210 220 230 240
TAFSGPSDST QTPSVTASFL SSITFSWYDR TVLKGYKHPL TLEDVWDIDE GFKTRSVTSK
250 260 270 280 290 300
FEAAMTKDLQ KARQAFQRRL QKSQRKPEAT LHGLNKKQSQ SQDVLVLEEA KKKSEKTTKD
310 320 330 340 350 360
YPKSWLIKSL FKTFHVVILK SFILKLIHDL LVFLNPQLLK LLIGFVKSSN SYVWFGYICA
370 380 390 400 410 420
ILMFAVTLIQ SFCLQSYFQH CFVLGMCVRT TVMSSIYKKA LTLSNLARKQ YTIGETVNLM
430 440 450 460 470 480
SVDSQKLMDA TNYMQLVWSS VIQITLSIFF LWRELGPSIL AGVGVMVLLI PVNGVLATKI
490 500 510 520 530 540
RNIQVQNMKN KDKRLKIMNE ILSGIKILKY FAWEPSFQEQ VQGIRKKELK NLLRFGQLQS
550 560 570 580 590 600
LLIFILQITP ILVSVVTFSV YVLVDSANVL NAEKAFTSIT LFNILRFPLS MLPMVTSSIL
610 620 630 640 650 660
QASVSVDRLE RYLGGDDLDT SAIRRVSNFD KAVKFSEASF TWDPDLEATI QDVNLDIKPG
670 680 690 700 710 720
QLVAVVGTVG SGKSSLVSAM LGEMENVHGH ITIQGSTAYV PQQSWIQNGT IKDNILFGSE
730 740 750 760 770 780
YNEKKYQQVL KACALLPDLE ILPGGDMAEI GEKGINLSGG QKQRVSLARA AYQDADIYIL
790 800 810 820 830 840
DDPLSAVDAH VGKHIFNKVV GPNGLLAGKT RIFVTHGIHF LPQVDEIVVL GKGTILEKGS
850 860 870 880 890 900
YRDLLDKKGV FARNWKTFMK HSGPEGEATV NNDSEAEDDD DGLIPTMEEI PEDAASLAMR
910 920 930 940 950 960
RENSLRRTLS RSSRSSSRRG KSLKNSLKIK NVNVLKEKEK EVEGQKLIKK EFVETGKVKF
970 980 990 1000 1010 1020
SIYLKYLQAV GWWSILFIIL FYGLNNVAFI GSNLWLSAWT SDSDNLNGTN NSSSHRDMRI
1030 1040 1050 1060 1070 1080
GVFGALGLAQ GICLLISTLW SIYACRNASK ALHGQLLTNI LRAPMRFFDT TPTGRIVNRF
1090 1100 1110 1120 1130 1140
SGDISTVDDL LPQTLRSWMM CFFGIAGTLV MICMATPVFA IIIIPLSILY ISVQVFYVAT
1150 1160 1170 1180 1190 1200
SRQLRRLDSV TKSPIYSHFS ETVTGLPIIR AFEHQQRFLA WNEKQIDINQ KCVFSWITSN
1210 1220 1230 1240 1250 1260
RWLAIRLELV GNLVVFCSAL LLVIYRKTLT GDVVGFVLSN ALNITQTLNW LVRMTSEAET
1270 1280 1290 1300 1310 1320
NIVAVERISE YINVENEAPW VTDKRPPADW PRHGEIQFNN YQVRYRPELD LVLKGITCNI
1330 1340 1350 1360 1370 1380
KSGEKVGVVG RTGAGKSSLT NCLFRILESA GGQIIIDGID VASIGLHDLR ERLTIIPQDP
1390 1400 1410 1420 1430 1440
ILFSGSLRMN LDPFNKYSDE EVWRALELAH LRSFVSGLQL GLLSEVTEGG DNLSIGQRQL
1450 1460 1470 1480 1490 1500
LCLGRAVLRK SKILVLDEAT AAVDLETDSL IQTTIRKEFS QCTVITIAHR LHTIMDSDKI
1510 1520 1530 1540
MVLDNGKIVE YGSPEELLSN RGSFYLMAKE AGIENVNHTE L