- EMDB-28854: Bovine multidrug resistance protein 1 (MRP1) bound to cyclic pept... -
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基本情報
登録情報
データベース: EMDB / ID: EMD-28854
タイトル
Bovine multidrug resistance protein 1 (MRP1) bound to cyclic peptide inhibitor 1 (CPI1)
マップデータ
Full map of the 3.27 angstrom density map generated from image processing in RELION
試料
複合体: Bovine multidrug resistance protein 1 (MRP1) in complex with cyclic peptide inhibitor 1 (CPI1)
タンパク質・ペプチド: Multidrug resistance-associated protein 1
タンパク質・ペプチド: Cyclic peptide inhibitor 1 (CPI1)
キーワード
TRANSPORT PROTEIN
機能・相同性
機能・相同性情報
Sphingolipid de novo biosynthesis / Heme degradation / Synthesis of Leukotrienes (LT) and Eoxins (EX) / Transport of RCbl within the body / cyclic nucleotide transport / Paracetamol ADME / ABC-family proteins mediated transport / leukotriene transport / glutathione transmembrane transport / ABC-type glutathione-S-conjugate transporter ...Sphingolipid de novo biosynthesis / Heme degradation / Synthesis of Leukotrienes (LT) and Eoxins (EX) / Transport of RCbl within the body / cyclic nucleotide transport / Paracetamol ADME / ABC-family proteins mediated transport / leukotriene transport / glutathione transmembrane transport / ABC-type glutathione-S-conjugate transporter / ABC-type glutathione S-conjugate transporter activity / Cytoprotection by HMOX1 / glutathione transmembrane transporter activity / ABC-type xenobiotic transporter / ABC-type xenobiotic transporter activity / xenobiotic transport / lipid transport / xenobiotic transmembrane transporter activity / ABC-type transporter activity / positive regulation of inflammatory response / basolateral plasma membrane / response to xenobiotic stimulus / ATP hydrolysis activity / ATP binding 類似検索 - 分子機能
Multi drug resistance-associated protein / : / ABC transporter TMD0 domain / : / ABC transporter transmembrane region / ABC transporter type 1, transmembrane domain / ABC transporter integral membrane type-1 fused domain profile. / ABC transporter type 1, transmembrane domain superfamily / ABC transporter-like, conserved site / ABC transporters family signature. ...Multi drug resistance-associated protein / : / ABC transporter TMD0 domain / : / ABC transporter transmembrane region / ABC transporter type 1, transmembrane domain / ABC transporter integral membrane type-1 fused domain profile. / ABC transporter type 1, transmembrane domain superfamily / ABC transporter-like, conserved site / ABC transporters family signature. / ABC transporter / ABC transporter-like, ATP-binding domain / ATP-binding cassette, ABC transporter-type domain profile. / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / P-loop containing nucleoside triphosphate hydrolase 類似検索 - ドメイン・相同性
Multidrug resistance-associated protein 1 類似検索 - 構成要素
National Institutes of Health/National Cancer Institute (NIH/NCI)
5F30CA257282-03
米国
引用
ジャーナル: Proc Natl Acad Sci U S A / 年: 2023 タイトル: A macrocyclic peptide inhibitor traps MRP1 in a catalytically incompetent conformation. 著者: Harlan L Pietz / Ata Abbas / Zachary Lee Johnson / Michael L Oldham / Hiroaki Suga / Jue Chen / 要旨: Adenosine triphosphate-binding cassette (ABC) transporters, such as multidrug resistance protein 1 (MRP1), protect against cellular toxicity by exporting xenobiotic compounds across the plasma ...Adenosine triphosphate-binding cassette (ABC) transporters, such as multidrug resistance protein 1 (MRP1), protect against cellular toxicity by exporting xenobiotic compounds across the plasma membrane. However, constitutive MRP1 function hinders drug delivery across the blood-brain barrier, and MRP1 overexpression in certain cancers leads to acquired multidrug resistance and chemotherapy failure. Small-molecule inhibitors have the potential to block substrate transport, but few show specificity for MRP1. Here we identify a macrocyclic peptide, named CPI1, which inhibits MRP1 with nanomolar potency but shows minimal inhibition of a related multidrug transporter P-glycoprotein. A cryoelectron microscopy (cryo-EM) structure at 3.27 Å resolution shows that CPI1 binds MRP1 at the same location as the physiological substrate leukotriene C4 (LTC). Residues that interact with both ligands contain large, flexible sidechains that can form a variety of interactions, revealing how MRP1 recognizes multiple structurally unrelated molecules. CPI1 binding prevents the conformational changes necessary for adenosine triphosphate (ATP) hydrolysis and substrate transport, suggesting it may have potential as a therapeutic candidate.