6ZS5

3.5 A cryo-EM structure of human uromodulin filament core

Summary for 6ZS5

• Entry DOI: 10.2210/pdb6zs5/pdb
• EMDB information: 11388
• Descriptor: Uromodulin, alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose, 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose (3 entities in total)
• Functional Keywords: uromodulin, umod, thp, immunoglobulin-like fold, tamm-horsfall protein, glycoprotein, zp module, zona pellucida, fold complementation, beta-strand complementation, cryosparc, filament, soluble adhesion antagonist, antimicrobial protein
• Biological source: Homo sapiens (Human)
• Total number of polymer chains: 2
• Total formula weight: 140978.58

Authors

Stanisich, J.J.,Zyla, D.,Afanasyev, P.,Xu, J.,Pilhofer, M.,Boeringer, D.,Glockshuber, R. (deposition date: 2020-07-15, release date: 2020-09-02, Last modification date: 2024-10-23)

Primary citation

Stanisich, J.J.,Zyla, D.S.,Afanasyev, P.,Xu, J.,Kipp, A.,Olinger, E.,Devuyst, O.,Pilhofer, M.,Boehringer, D.,Glockshuber, R.
The cryo-EM structure of the human uromodulin filament core reveals a unique assembly mechanism.
Elife, 9:-, 2020

PubMed Abstract: The glycoprotein uromodulin (UMOD) is the most abundant protein in human urine and forms filamentous homopolymers that encapsulate and aggregate uropathogens, promoting pathogen clearance by urine excretion. Despite its critical role in the innate immune response against urinary tract infections, the structural basis and mechanism of UMOD polymerization remained unknown. Here, we present the cryo-EM structure of the UMOD filament core at 3.5 Å resolution, comprised of the bipartite zona pellucida (ZP) module in a helical arrangement with a rise of ~65 Å and a twist of ~180°. The immunoglobulin-like ZPN and ZPC subdomains of each monomer are separated by a long linker that interacts with the preceding ZPC and following ZPN subdomains by β-sheet complementation. The unique filament architecture suggests an assembly mechanism in which subunit incorporation could be synchronized with proteolytic cleavage of the C-terminal pro-peptide that anchors assembly-incompetent UMOD precursors to the membrane.

PubMed: 32815518
DOI: 10.7554/eLife.60265

Experimental method

ELECTRON MICROSCOPY (3.5 Å)