ABCC4 p.Thr364Arg
| Predicted by SNAP2: | A: N (53%), C: D (53%), D: D (66%), E: D (66%), F: D (66%), G: D (59%), H: D (53%), I: D (63%), K: D (75%), L: D (66%), M: N (53%), N: N (53%), P: D (59%), Q: D (53%), R: D (71%), S: N (93%), V: D (63%), W: D (75%), Y: D (59%), |
| Predicted by PROVEAN: | A: D, C: D, D: D, E: D, F: D, G: D, H: D, I: D, K: D, L: D, M: D, N: D, P: D, Q: D, R: D, S: N, V: D, W: D, Y: D, |
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[hide] Multidrug resistance associated proteins as determ... Curr Drug Metab. 2007 Dec;8(8):787-802. Yu XQ, Xue CC, Wang G, Zhou SF
Multidrug resistance associated proteins as determining factors of pharmacokinetics and pharmacodynamics of drugs.
Curr Drug Metab. 2007 Dec;8(8):787-802., [PMID:18220559]
Abstract [show]
The multidrug resistance associated proteins (MRP1, MRP2, MRP3, MRP4, MRP5, MRP6, MRP7, MRP8 and MRP9) belong to the ATP-binding cassette superfamily (ABCC family) of transporters. They are expressed differentially in the liver, kidney, intestine, brain and other tissues. These transporters are localized to the apical and/or basolateral membrane of the hepatocytes, enterocytes, renal proximal tubule cells and endothelial cells of the blood-brain barrier. Several MRPs (mainly MRP1-3) are associated with tumor resistance which is often caused by an increased efflux and decreased intracellular accumulation of natural product anticancer drugs and other anticancer agents. MRPs transport a structurally diverse array of important endogenous substances and xenobiotics and their metabolites (in particular conjugates) with different substrate specificity and transport kinetics. Most MRPs are subject to induction and inhibition by a variety of compounds. Several nuclear receptors, including pregnane X receptor (PXR), liver X receptor (LXR), and farnesoid receptor (FXR) participate in the regulation of MRPs. MRPs play an important role in the absorption, distribution and elimination of various drugs in the body and thus may affect their efficacy and toxicity and cause drug-drug interactions. MRPs located in the blood-brain barrier can restrict the penetration of compounds into the central nervous system. Mutation of MRP2 causes Dubin-Johnson syndrome, while mutations in MRP6 are responsible for pseudoxanthoma elasticum. More recently, mutations in mouse Mrp6/Abcc6 gene is associated with dystrophic cardiac calcification (DCC), a disease characterized by hydroxyapatite deposition in necrotic myocytes. A single nucleotide polymorphism, 538G>A in the MRP8/ABCC11 gene, is responsible for determination of earwax type. A better understanding of the function and regulating mechanism of MRPs can help minimize and avoid drug toxicity, unfavourable drug-drug interactions, and to overcome drug resistance.
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No. Sentence Comment
406 MRP Chromosomal location Amino acid variation Nucleotide variation Location References Lys13Asn G39GC Exon1 His68Tyr C202T Exon2 Ser346Phe C1037T Exon9 Gln513Lys C1537A Exon12 Arg1297His G3890A Exon27 MRP3 17q21.3 Gly1423Arg G4267A Exon29 [241] MRP4 13q32.1 Unknown MRP5 3q27 Unknown L63L W64R 189G>C 190T>C Exon2 Exon2 [250] T364R Q378X 1091C>G 1132C>T Exon9 Exon9 [260, 261] R518X R518Q 1552 C>T 1553G>A Exon12 Exon12 [247, 262] R1141X R1138Q T1130M R1114C M1127T 3421C>T 3413G>A 3389C>T 3340C>T 3380C>T Exon24 Exon24 Exon24 Exon24 Exon24 [246, 247] R1275X 3823C>T Exon27 [246] P1346S 4036C>T Exon28 [246] MRP6 16p13.1 E1400K 4198G>A Exon29 [247] MRP7 6p12-21 Unknown MRP8 16q12.1 Unknown MRP9 16q12.1 Unknown CONCLUSIONS AND FUTURE DIRECTIONS MRPs which belong to the ABC transporter family are able to transport a remarkable array of diverse endo- and xenobiotics and their metabolites.
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ABCC4 p.Thr364Arg 18220559:406:326
status: NEW