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MRP4
ATP-binding cassette sub-family C member 4 (ABCC4), also known as the multidrug resistance-associated protein 4 (MRP4) or multi-specific organic anion transporter B (MOAT-B), is a protein that in humans is encoded by the ''ABCC4'' gene. ABCC4 acts as a regulator of intracellular cyclic nucleotide levels and as a mediator of cyclic adenosine monophosphate, cAMP-dependent signal transduction to the nucleus. MRP4/ABCC4 also transports prostaglandins, for example PGE2, out of the cell where they can bind receptors. MRP4/ABCC4 expression is dysregulated in several cancers and is also upregulated in peritoneal endometriosis. Interactive pathway map See also * ATP-binding cassette transporter References Further reading * * * * * * * * * * * * * * * * * * * * External links * * {{DEFAULTSORT:Abcc4 ATP-binding cassette transporters ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ATP-binding Cassette Transporter
The ATP-binding cassette transporters (ABC transporters) are a transport system superfamily that is one of the largest and possibly one of the oldest gene families. It is represented in all extant phyla, from prokaryotes to humans. ABC transporters belong to translocases. ABC transporters often consist of multiple subunits, one or two of which are transmembrane proteins and one or two of which are membrane-associated AAA ATPases. The ATPase subunits utilize the energy of adenosine triphosphate (ATP) binding and hydrolysis to provide the energy needed for the translocation of substrates across membranes, either for uptake or for export of the substrate. Most of the uptake systems also have an extracytoplasmic receptor, a solute binding protein. Some homologous ATPases function in non-transport-related processes such as translation of RNA and DNA repair. ABC transporters are considered to be an ABC superfamily based on the similarities of the sequence and organization of their ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |