ABCB1
GeneName
ABCB1
Summary
ABCB1, also known as P glycoprotein, PGY1, or MDR1, is a 141kDa membrane protein predominantly expressed at the apical plasma membrane of epithelial cells, including those in the intestine, liver, and blood-brain barrier. It functions as an ATP-dependent efflux transporter, playing a critical role in the transmembrane transport of various substrates, including xenobiotics, drugs, and lipids. ABCB1 is involved in the cellular response to a range of stimuli, such as antibiotics and alkaloids, and is essential for maintaining cellular homeostasis and protecting cells from toxic compounds through its ability to export harmful substances.
Importance
ABCB1 is relevant to: - Drug resistance in cancer therapy, as its overexpression can lead to decreased efficacy of chemotherapeutic agents - Pharmacokinetics and drug absorption, influencing the bioavailability of orally administered drugs - The establishment and maintenance of the blood-brain barrier, impacting the delivery of therapeutics to the central nervous system - The transport of hormones and nutrients, which is crucial for various physiological processes, including pregnancy and lactation - Xenobiotic detoxification, contributing to the elimination of environmental toxins and drugs from the body
Top Products
For researchers investigating ABCB1, we highly recommend the top-selling recombinant antibody, Anti-P Glycoprotein antibody [EPR10364-57] (ab170904). This well-cited antibody has garnered 221 citations, reflecting its strong reputation in the field. It has been validated in knockout models, ensuring reliable performance in various applications, particularly in Western blotting (WB) and immunohistochemistry (IHC). This antibody is an excellent choice for those seeking consistent and effective detection of ABCB1 in their studies.
Abcam Product Citation Summary
The data indicates a significant focus on the role of ABCB1 in drug resistance across various cancer types, particularly renal cell carcinoma and breast cancer. The use of Abcam antibodies in Western blotting highlights the importance of this target in understanding the mechanisms of drug sensitivity and resistance in cancer therapies.
Abcam Product Citation Table
Function
Translocates drugs and phospholipids across the membrane (PubMed:2897240, PubMed:35970996, PubMed:8898203, PubMed:9038218, PubMed:35507548). Catalyzes the flop of phospholipids from the cytoplasmic to the exoplasmic leaflet of the apical membrane. Participates mainly to the flop of phosphatidylcholine, phosphatidylethanolamine, beta-D-glucosylceramides and sphingomyelins (PubMed:8898203). Energy-dependent efflux pump responsible for decreased drug accumulation in multidrug-resistant cells (PubMed:2897240, PubMed:35970996, PubMed:9038218).
Involvement in disease
Inflammatory bowel disease 13
IBD13
A chronic, relapsing inflammation of the gastrointestinal tract with a complex etiology. It is subdivided into Crohn disease and ulcerative colitis phenotypes. Crohn disease may affect any part of the gastrointestinal tract from the mouth to the anus, but most frequently it involves the terminal ileum and colon. Bowel inflammation is transmural and discontinuous; it may contain granulomas or be associated with intestinal or perianal fistulas. In contrast, in ulcerative colitis, the inflammation is continuous and limited to rectal and colonic mucosal layers; fistulas and granulomas are not observed. Both diseases include extraintestinal inflammation of the skin, eyes, or joints.
None
Disease susceptibility is associated with variants affecting the gene represented in this entry.
Encephalopathy, acute transient
ENPAT
An autosomal recessive neurologic disorder triggered by specific drugs, or acute febrile or afebrile illness. Clinical features include encephalopathy, ataxia, spasticity, pyramidal signs, diplopia, vomiting, and coma. Symptoms fully resolve within few days.
None
The disease is caused by variants affecting the gene represented in this entry.
Sequence Similarities
Belongs to the ABC transporter superfamily. ABCB family. Multidrug resistance exporter (TC 3.A.1.201) subfamily.
Tissue Specificity
Expressed in small intestine (PubMed:28408210). Expressed in liver, kidney and brain.
Cellular localization
- Cell membrane
- Multi-pass membrane protein
- Apical cell membrane
- Cytoplasm
- ABCB1 localization is influenced by C1orf115 expression levels (plasma membrane versus cytoplasm). Localized to the apical membrane of enterocytes (PubMed:28408210).
Alternative names
CD243, MDR1, PGY1, ABCB1, ATP-dependent translocase ABCB1, ATP-binding cassette sub-family B member 1, Multidrug resistance protein 1, P-glycoprotein 1, Phospholipid transporter ABCB1