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-Structure paper
| タイトル | Structures of MmpL complexes reveal the assembly and mechanism of this family of transporters. |
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| ジャーナル・号・ページ | Sci Adv, Vol. 11, Issue 33, Page eadx1129, Year 2025 |
| 掲載日 | 2025年8月15日 |
著者 | Zhemin Zhang / Rakesh Maharjan / William D Gregor / Philip A Klenotic / Edward W Yu / ![]() |
| PubMed 要旨 | We coexpressed the mycobacterial membrane protein large 5 (MmpL5) transporter and MmpS5 adaptor proteins in and defined their structures from detergent-solubilized crude membranes. We observed that ...We coexpressed the mycobacterial membrane protein large 5 (MmpL5) transporter and MmpS5 adaptor proteins in and defined their structures from detergent-solubilized crude membranes. We observed that MmpL5 presents as a monomer in complex with the cytosolic meromycolate extension acyl carrier protein M (AcpM), where these AcpM-MmpL5 complexes generate regular two-dimensional arrays. We also provide structural information to show that MmpL5 assembles as a trimer that interacts with MmpS5 and AcpM to form the tripartite complex AcpM-MmpL5-MmpS5 that spans both the inner and outer membranes of the mycobacterium. In addition, we found that MmpL5 and AcpM are able to form the trimeric AcpM-MmpL5 complex. The structural data reveal that the full-length MmpL5 trimer is capable of spanning the entire mycobacterial cell envelope to transport substrates. However, this assembly requires the presence of MmpS5 to stabilize secondary structural features of the MmpL5 periplasmic subdomains. |
リンク | Sci Adv / PubMed:40802754 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 2.81 - 3.67 Å |
| 構造データ | EMDB-48675, PDB-9mvz: EMDB-48676, PDB-9mw0: ![]() EMDB-48701: Local refinement map of MmpL5-AcpM cluster part 1 ![]() EMDB-48702: Local refinement map of MmpL5-AcpM cluster part 3 ![]() EMDB-48703: The consensus map of MmpL5-AcpM cluster ![]() EMDB-48704: Local refinement map of MmpL5-AcpM cluster part 2 EMDB-48706, PDB-9mx0: |
| 化合物 | ![]() ChemComp-PNS: |
| 由来 |
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キーワード | MEMBRANE PROTEIN / MmpL5 / MmpS5 / AcpM / Tripartite complex / Mycolicibacterium smegmatis / bipartite complex |
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mycolicibacterium smegmatis (バクテリア)
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