Download MendeleyStructural insights into the calcium-coupled zinc export of human ZnT1.
Sun, C., He, B., Gao, Y., Wang, X., Liu, X., Sun, L.(2024) Sci Adv 10: eadk5128-eadk5128
- PubMed: 38669333
- DOI: https://doi.org/10.1126/sciadv.adk5128
- Primary Citation of Related Structures:
8J2G - PubMed Abstract:
Cellular zinc (Zn 2+ ) homeostasis is essential to human health and is under tight regulations. Human zinc transporter 1 (hZnT1) is a plasma membrane-localized Zn 2+ exporter belonging to the ZnT family, and its functional aberration is associated with multiple diseases. Here, we show that hZnT1 works as a Zn 2+ /Ca 2+ exchanger. We determine the structure of hZnT1 using cryo-electron microscopy (cryo-EM) single particle analysis. hZnT1 adopts a homodimeric structure, and each subunit contains a transmembrane domain consisting of six transmembrane segments, a cytosolic domain, and an extracellular domain. The transmembrane region displays an outward-facing conformation. On the basis of structural and functional analysis, we propose a model for the hZnT1-mediated Zn 2+ /Ca 2+ exchange. Together, these results facilitate our understanding of the biological functions of hZnT1 and provide a basis for further investigations of the ZnT family transporters.
- Department of Neurology, The First Affiliated Hospital of USTC, MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics, Hefei National Research Center for Physical Sciences at the Microscale, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230027, China.
Organizational Affiliation:
