8zbs
From Proteopedia
(Difference between revisions)
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| - | '''Unreleased structure''' | ||
| - | + | ==Cryo-EM structure of nanodisc-reconstituted wildtype human MRP4 (in complex with vincristine)== | |
| + | <StructureSection load='8zbs' size='340' side='right'caption='[[8zbs]], [[Resolution|resolution]] 2.96Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[8zbs]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8ZBS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8ZBS FirstGlance]. <br> | ||
| + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 2.96Å</td></tr> | ||
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ANP:PHOSPHOAMINOPHOSPHONIC+ACID-ADENYLATE+ESTER'>ANP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr> | ||
| + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=8zbs FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8zbs OCA], [https://pdbe.org/8zbs PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8zbs RCSB], [https://www.ebi.ac.uk/pdbsum/8zbs PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8zbs ProSAT]</span></td></tr> | ||
| + | </table> | ||
| + | == Function == | ||
| + | [https://www.uniprot.org/uniprot/MRP4_HUMAN MRP4_HUMAN] ATP-dependent transporter of the ATP-binding cassette (ABC) family that actively extrudes physiological compounds and xenobiotics from cells. Transports a range of endogenous molecules that have a key role in cellular communication and signaling, including cyclic nucleotides such as cyclic AMP (cAMP) and cyclic GMP (cGMP), bile acids, steroid conjugates, urate, and prostaglandins (PubMed:11856762, PubMed:12523936, PubMed:12835412, PubMed:12883481, PubMed:15364914, PubMed:15454390, PubMed:16282361, PubMed:17959747, PubMed:18300232, PubMed:26721430). Mediates the ATP-dependent efflux of glutathione conjugates such as leukotriene C4 (LTC4) and leukotriene B4 (LTB4) too. The presence of GSH is necessary for the ATP-dependent transport of LTB4, whereas GSH is not required for the transport of LTC4 (PubMed:17959747). Mediates the cotransport of bile acids with reduced glutathione (GSH) (PubMed:12523936, PubMed:12883481, PubMed:16282361). Transports a wide range of drugs and their metabolites, including anticancer, antiviral and antibiotics molecules (PubMed:11856762, PubMed:12105214, PubMed:15454390, PubMed:17344354, PubMed:18300232). Confers resistance to anticancer agents such as methotrexate (PubMed:11106685).<ref>PMID:11106685</ref> <ref>PMID:11856762</ref> <ref>PMID:12105214</ref> <ref>PMID:12523936</ref> <ref>PMID:12835412</ref> <ref>PMID:12883481</ref> <ref>PMID:15364914</ref> <ref>PMID:15454390</ref> <ref>PMID:16282361</ref> <ref>PMID:17344354</ref> <ref>PMID:17959747</ref> <ref>PMID:18300232</ref> <ref>PMID:26721430</ref> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Multidrug resistance proteins (MRPs) are one of the major mechanisms for developing cancer drug resistance. Human MRP4 (hMRP4) plays an important role in various chemotherapy-resistant cancers. Here, we show hMRP4 mediates the resistance of a broad spectrum of antitumor reagents in the cultured tumor cells, among which the cell resistance to vincristine and 5-fluorouracil is rescued by supplementing a tyrosinase inhibitor, lapatinib. The cryoelectron microscopy (cryo-EM) structures of hMRP4 in the substrate- or inhibitor-bound form are determined. Although lapatinib shares partial binding sites with vincristine and 5-fluorouracil using a similar set of crucial residues located in the central cavity of hMRP4, the high binding affinity of lapatinib and its unique binding mode with transmembrane helices TM2 and TM12 inside the pathway tunnel prohibit hMRP4 from structural transition between intermediate states during drug translocation. This study provides mechanistic insights into the therapeutical potential of lapatinib in combating hMRP4-mediated MDR. | ||
| - | + | Structural basis for the reversal of human MRP4-mediated multidrug resistance by lapatinib.,Xie Z, Lv J, Huang W, Wu Z, Zhu R, Deng Z, Long F Cell Rep. 2025 Mar 25;44(4):115466. doi: 10.1016/j.celrep.2025.115466. PMID:40138312<ref>PMID:40138312</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | [[Category: | + | </div> |
| + | <div class="pdbe-citations 8zbs" style="background-color:#fffaf0;"></div> | ||
| + | == References == | ||
| + | <references/> | ||
| + | __TOC__ | ||
| + | </StructureSection> | ||
| + | [[Category: Homo sapiens]] | ||
| + | [[Category: Large Structures]] | ||
| + | [[Category: Long F]] | ||
| + | [[Category: Xie Z]] | ||
Current revision
Cryo-EM structure of nanodisc-reconstituted wildtype human MRP4 (in complex with vincristine)
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