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-Structure paper
タイトル | Structural basis for substrate and inhibitor recognition of human multidrug transporter MRP4. |
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ジャーナル・号・ページ | Commun Biol, Vol. 6, Issue 1, Page 549, Year 2023 |
掲載日 | 2023年5月22日 |
著者 | Ying Huang / Chenyang Xue / Liangdong Wang / Ruiqian Bu / Jianqiang Mu / Yong Wang / Zhongmin Liu / |
PubMed 要旨 | Human multidrug resistance protein 4 (hMRP4, also known as ABCC4), with a representative topology of the MRP subfamily, translocates various substrates across the membrane and contributes to the ...Human multidrug resistance protein 4 (hMRP4, also known as ABCC4), with a representative topology of the MRP subfamily, translocates various substrates across the membrane and contributes to the development of multidrug resistance. However, the underlying transport mechanism of hMRP4 remains unclear due to a lack of high-resolution structures. Here, we use cryogenic electron microscopy (cryo-EM) to resolve its near-atomic structures in the apo inward-open and the ATP-bound outward-open states. We also capture the PGE1 substrate-bound structure and, importantly, the inhibitor-bound structure of hMRP4 in complex with sulindac, revealing that substrate and inhibitor compete for the same hydrophobic binding pocket although with different binding modes. Moreover, our cryo-EM structures, together with molecular dynamics simulations and biochemical assay, shed light on the structural basis of the substrate transport and inhibition mechanism, with implications for the development of hMRP4-targeted drugs. |
リンク | Commun Biol / PubMed:37217525 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 2.95 - 3.8 Å |
構造データ | EMDB-35834, PDB-8iz7: EMDB-35835, PDB-8iz8: EMDB-35836, PDB-8iz9: EMDB-35837, PDB-8iza: |
化合物 | ChemComp-SUZ: ChemComp-XPG: ChemComp-ATP: ChemComp-MG: |
由来 |
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キーワード | MEMBRANE PROTEIN / cryo-EM structure of sulindac-bound hMRP4 / cryo EM structure of apo hMRP4 / cryo-EM structure of PGE1-bound hMRP4 / ATP-bound hMRP4 |