malaria / nucleoside transporter / GSK4 / TRANSPORT PROTEIN / MEMBRANE PROTEIN
機能・相同性
機能・相同性情報
adenosine transport / nucleoside transmembrane transporter activity / purine nucleobase transport / bioluminescence / generation of precursor metabolites and energy / plasma membrane 類似検索 - 分子機能
Equilibrative nucleoside transporter / MFS transporter superfamily / Green fluorescent protein, GFP / Green fluorescent protein-related / Green fluorescent protein / Green fluorescent protein 類似検索 - ドメイン・相同性
Green fluorescent protein / Nucleoside transporter 1 類似検索 - 構成要素
National Natural Science Foundation of China (NSFC)
32171211
中国
引用
ジャーナル: Nat Commun / 年: 2023 タイトル: Structural basis of the substrate recognition and inhibition mechanism of Plasmodium falciparum nucleoside transporter PfENT1. 著者: Chen Wang / Leiye Yu / Jiying Zhang / Yanxia Zhou / Bo Sun / Qingjie Xiao / Minhua Zhang / Huayi Liu / Jinhong Li / Jialu Li / Yunzi Luo / Jie Xu / Zhong Lian / Jingwen Lin / Xiang Wang / ...著者: Chen Wang / Leiye Yu / Jiying Zhang / Yanxia Zhou / Bo Sun / Qingjie Xiao / Minhua Zhang / Huayi Liu / Jinhong Li / Jialu Li / Yunzi Luo / Jie Xu / Zhong Lian / Jingwen Lin / Xiang Wang / Peng Zhang / Li Guo / Ruobing Ren / Dong Deng / 要旨: By lacking de novo purine biosynthesis enzymes, Plasmodium falciparum requires purine nucleoside uptake from host cells. The indispensable nucleoside transporter ENT1 of P. falciparum facilitates ...By lacking de novo purine biosynthesis enzymes, Plasmodium falciparum requires purine nucleoside uptake from host cells. The indispensable nucleoside transporter ENT1 of P. falciparum facilitates nucleoside uptake in the asexual blood stage. Specific inhibitors of PfENT1 prevent the proliferation of P. falciparum at submicromolar concentrations. However, the substrate recognition and inhibitory mechanism of PfENT1 are still elusive. Here, we report cryo-EM structures of PfENT1 in apo, inosine-bound, and inhibitor-bound states. Together with in vitro binding and uptake assays, we identify that inosine is the primary substrate of PfENT1 and that the inosine-binding site is located in the central cavity of PfENT1. The endofacial inhibitor GSK4 occupies the orthosteric site of PfENT1 and explores the allosteric site to block the conformational change of PfENT1. Furthermore, we propose a general "rocker switch" alternating access cycle for ENT transporters. Understanding the substrate recognition and inhibitory mechanisms of PfENT1 will greatly facilitate future efforts in the rational design of antimalarial drugs.
超分子 #1: nucleoside/nucleobase transporter fusion with GFP
超分子
名称: nucleoside/nucleobase transporter fusion with GFP / タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: #1 詳細: the cDNA of the GFP was cloned into PfNT1 between K370 and K371
由来(天然)
生物種: Plasmodium falciparum 3D7 (マラリア病原虫)
分子量
理論値: 47.5 kDa/nm
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分子 #1: Nucleoside transporter 1,Green fluorescent protein
分子
名称: Nucleoside transporter 1,Green fluorescent protein / タイプ: protein_or_peptide / ID: 1 詳細: PfNT1(Y190A) fused with GFP the GFP was inserted into PfNT1 between K370 and K371 コピー数: 1 / 光学異性体: LEVO