Download MendeleyCryo-EM structure and complementary drug efflux activity of the Acinetobacter baumannii multidrug efflux pump AdeG.
Ouyang, Z., He, W., Wu, D., An, H., Duan, L., Jiao, M., He, X., Yu, Q., Zhang, J., Qin, Q., Wang, R., Zheng, F., Hwang, P.M., Hua, X., Zhu, L., Wen, Y.(2025) Structure 33: 539-551.e4
- PubMed: 39798571 Search on PubMed
- DOI: https://doi.org/10.1016/j.str.2024.12.009
- Primary Citation Related Structures:
8YR0 - PubMed Abstract:
Multidrug-resistant Acinetobacter baumannii has emerged as one of the most antibiotic-resistant bacterial pathogens associated with nosocomial infection, with its resistance highly depending on multiple multidrug efflux pumps. Here, we report the cryoelectron microscopy (cryo-EM) structure of Acinetobacter drug efflux G (AdeG), the inner membrane component of one of three important resistance-nodulation-cell division (RND) pump family members in A. baumannii, which is involved in drug resistance to chloramphenicol, trimethoprim, ciprofloxacin, and clindamycin. We systematically compare the structures and substrate binding specificities of AdeG, AdeB, and AdeJ multidrug efflux pumps via molecular docking, revealing potential determinants for drug binding. Knockout experiments demonstrate a functional complementarity between AdeABC, AdeFGH, and AdeIJK. Our study provides a structural understanding of A. baumannii multidrug efflux pump AdeG and reveals complementary drug efflux activity between AdeG and other RND efflux pumps, which may promote further rational drug discovery efforts targeting multidrug efflux pumps.
- Center for Microbiome Research of Med-X Institute, Department of Critical Care Medicine, Shaanxi Provincial Key Laboratory of Sepsis in Critical Care Medicine, The First Affiliated Hospital, Xi'an Jiaotong University, Xi'an 710061, China.
Organizational Affiliation:
