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ATP-binding cassette, sub-family G (WHITE), member 2
Symbols ABCG2; MRX; BCRP1; ABC15; ABCP; BCRP; BMDP; CDw338; EST157481; MGC102821; MXR; MXR1
External IDs OMIM603756 MGI1347061 HomoloGene55852 GeneCards: ABCG2 Gene
RNA expression pattern
PBB GE ABCG2 209735 at tn.png
More reference expression data
Species Human Mouse
Entrez 9429 26357
Ensembl ENSG00000118777 ENSMUSG00000029802
UniProt Q9UNQ0 Q7TMS5
RefSeq (mRNA) NM_004827 NM_011920
RefSeq (protein) NP_004818 NP_036050
Location (UCSC) Chr 4:
89.23 - 89.3 Mb
Chr 6:
58.53 - 58.62 Mb
PubMed search [1] [2]

ATP-binding cassette sub-family G member 2 is a protein that in humans is encoded by the ABCG2 gene.[1][2] ABCG2 has also been designated as CDw338 (cluster of differentiation w338).

The membrane-associated protein encoded by this gene is included in the superfamily of ATP-binding cassette (ABC) transporters. ABC proteins transport various molecules across extra- and intra-cellular membranes. ABC genes are divided into seven distinct subfamilies (ABC1, MDR/TAP, MRP, ALD, OABP, GCN20, White). This protein is a member of the White subfamily. Alternatively referred to as a breast cancer resistance protein, this protein functions as a xenobiotic transporter which may play a major role in multi-drug resistance. It likely serves as a cellular defense mechanism in response to mitoxantrone and anthracycline exposure. Significant expression of this protein has been observed in the placenta, which may suggest a potential role for this molecule in placenta tissue.[3]


See also


  1. ^ Allikmets R, Gerrard B, Hutchinson A, Dean M (Feb 1997). "Characterization of the human ABC superfamily: isolation and mapping of 21 new genes using the expressed sequence tags database". Hum Mol Genet 5 (10): 1649-55. PMID 8894702.  
  2. ^ Doyle LA, Yang W, Abruzzo LV, Krogmann T, Gao Y, Rishi AK, Ross DD (Jan 1999). "A multidrug resistance transporter from human MCF-7 breast cancer cells". Proc Natl Acad Sci U S A 95 (26): 15665-70. PMID 9861027.  
  3. ^ "Entrez Gene: ABCG2 ATP-binding cassette, sub-family G (WHITE), member 2".  

Further reading

  • Hazai E, Bikadi Z. (2008). "Homology modeling of breast cancer resistance protein (ABCG2).". J Struct Biol. 162 (1): 63–74. doi:10.1016/j.jsb.2007.12.001. PMID 18249138.  
  • Abbott BL (2006). "ABCG2 (BCRP): a cytoprotectant in normal and malignant stem cells". Clin Adv Hematol Oncol. 4 (1): 63–72. PMID 16562373.  
  • Schmitz G, Langmann T, Heimerl S (2002). "Role of ABCG1 and other ABCG family members in lipid metabolism.". J. Lipid Res. 42 (10): 1513–20. PMID 11590207.  
  • Ejendal KF, Hrycyna CA (2003). "Multidrug resistance and cancer: the role of the human ABC transporter ABCG2.". Curr. Protein Pept. Sci. 3 (5): 503–11. doi:10.2174/1389203023380521. PMID 12369998.  
  • Doyle LA, Ross DD (2003). "Multidrug resistance mediated by the breast cancer resistance protein BCRP (ABCG2).". Oncogene 22 (47): 7340–58. doi:10.1038/sj.onc.1206938. PMID 14576842.  
  • Sugimoto Y, Tsukahara S, Ishikawa E, Mitsuhashi J (2005). "Breast cancer resistance protein: molecular target for anticancer drug resistance and pharmacokinetics/pharmacodynamics.". Cancer Sci. 96 (8): 457–65. doi:10.1111/j.1349-7006.2005.00081.x. PMID 16108826.  
  • Ishikawa T, Tamura A, Saito H, et al. (2006). "Pharmacogenomics of the human ABC transporter ABCG2: from functional evaluation to drug molecular design.". Naturwissenschaften 92 (10): 451–63. doi:10.1007/s00114-005-0019-4. PMID 16160819.  
  • Krishnamurthy P, Schuetz JD (2006). "Role of ABCG2/BCRP in biology and medicine.". Annu. Rev. Pharmacol. Toxicol. 46: 381–410. doi:10.1146/annurev.pharmtox.46.120604.141238. PMID 16402910.  
  • Robey RW, Polgar O, Deeken J, et al. (2007). "ABCG2: determining its relevance in clinical drug resistance.". Cancer Metastasis Rev. 26 (1): 39–57. doi:10.1007/s10555-007-9042-6. PMID 17323127.  

External links

This article incorporates text from the United States National Library of Medicine, which is in the public domain.



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