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-Structure paper
タイトル | Structural insights into trehalose capture and translocation by mycobacterial LpqY-SugABC. |
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ジャーナル・号・ページ | Structure, Vol. 31, Issue 10, Page 1158-11165.e3, Year 2023 |
掲載日 | 2023年10月5日 |
著者 | Jingxi Liang / Xiuna Yang / Tianyu Hu / Yan Gao / Qi Yang / Haitao Yang / Wei Peng / Xiaoting Zhou / Luke W Guddat / Bing Zhang / Zihe Rao / Fengjiang Liu / |
PubMed 要旨 | The human pathogen, Mycobacterium tuberculosis (Mtb) relies heavily on trehalose for both survival and pathogenicity. The type I ATP-binding cassette (ABC) transporter LpqY-SugABC is the only ...The human pathogen, Mycobacterium tuberculosis (Mtb) relies heavily on trehalose for both survival and pathogenicity. The type I ATP-binding cassette (ABC) transporter LpqY-SugABC is the only trehalose import pathway in Mtb. Conformational dynamics of ABC transporters is an important feature to explain how they operate, but experimental structures are determined in a static environment. Therefore, a detailed transport mechanism cannot be elucidated because there is a lack of intermediate structures. Here, we used single-particle cryo-electron microscopy (cryo-EM) to determine the structure of the Mycobacterium smegmatis (M. smegmatis) trehalose-specific importer LpqY-SugABC complex in five different conformations. These structures have been classified and reconstructed from a single cryo-EM dataset. This study allows a comprehensive understanding of the trehalose recycling mechanism in Mycobacteria and also demonstrates the potential of single-particle cryo-EM to explore the dynamic structures of other ABC transporters and molecular machines. |
リンク | Structure / PubMed:37619560 |
手法 | EM (単粒子) |
解像度 | 3.51 - 4.55 Å |
構造データ | EMDB-34932, PDB-8hpl: EMDB-34933, PDB-8hpm: EMDB-34934, PDB-8hpn: EMDB-34941, PDB-8hpr: EMDB-34942, PDB-8hps: |
化合物 | ChemComp-ATP: ChemComp-MG: |
由来 |
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キーワード | TRANSPORT PROTEIN / Trehalose / ABC transporter / tuberculosis |