Download MendeleyStructural basis of human uromodulin filament networks in uropathogen capture.
Chang, A.N., Cerutti, G., Ogawa, Y., Basler, A., Switzer, W., Eng-Kohn, M., Lee, C., Fitzpatrick, A.W.P.(2025) Structure 33: 1186-1192.e3
- PubMed: 40345203 Search on PubMed
- DOI: https://doi.org/10.1016/j.str.2025.04.011
- Primary Citation Related Structures:
9NU1, 9NU2, 9NU3 - PubMed Abstract:
Uromodulin (UMOD), the most abundant protein in human urine, is essential for kidney function and urinary tract health. UMOD forms filaments that bind to uropathogenic bacteria, facilitating their aggregation and clearance from the urinary tract. Here, we present the cryo-electron microscopy (cryo-EM) structure of the bacteria-binding D10C domain of UMOD and reveal its binding to the filament core. The details of D10C-core binding explain the formation of distinct filament lattice architectures adopted by UMOD. The D10C-core binding interface gives rise to diverse filament lattice structures, ranging from open and expansive to compact and dense conformations, or a combination of both. We hypothesize that other molecules present in urine may act as cross-linking agents, further stabilizing this binding interface and facilitating the connection of individual filaments into larger networks capable of effectively trapping bacteria. Structural mapping of kidney disease-related mutations points toward the abolition of disulfide bonds and promotion of mutant UMOD aggregation.
- Mortimer B. Zuckerman Mind Brain Behavior Institute, Columbia University, New York, NY 10027, USA; Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY 10032, USA; Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University Irving Medical Center, 630 West 168th Street, New York, NY 10032, USA.
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