Crystal structure of the polymerization region of human uromodulin/Tamm-Horsfall protein

  • Classification: STRUCTURAL PROTEIN
  • Organism(s): Escherichia coli O157:H7, Homo sapiens
  • Expression System: Homo sapiens
  • Mutation(s): Yes 

  • Deposited: 2014-10-24 Released: 2016-01-27 
  • Deposition Author(s): Bokhove, M., De Sanctis, D., Jovine, L.
  • Funding Organization(s): Karolinska Institutet, Center for Biosciences, Swedish Research Council, Gustafsson Foundation for Research in Natural Sciences and Medicine, Sven and Ebba-Christina Hagberg foundation, European Molecular Biology Organization, European Union

Experimental Data Snapshot

  • Resolution: 3.20 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.222 

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This is version 2.1 of the entry. See complete history


A structured interdomain linker directs self-polymerization of human uromodulin.

Bokhove, M.Nishimura, K.Brunati, M.Han, L.de Sanctis, D.Rampoldi, L.Jovine, L.

(2016) Proc Natl Acad Sci U S A 113: 1552-1557

  • DOI: https://doi.org/10.1073/pnas.1519803113
  • Primary Citation of Related Structures:  
    4WRN, 5BUP

  • PubMed Abstract: 

    Uromodulin (UMOD)/Tamm-Horsfall protein, the most abundant human urinary protein, plays a key role in chronic kidney diseases and is a promising therapeutic target for hypertension. Via its bipartite zona pellucida module (ZP-N/ZP-C), UMOD forms extracellular filaments that regulate kidney electrolyte balance and innate immunity, as well as protect against renal stones. Moreover, salt-dependent aggregation of UMOD filaments in the urine generates a soluble molecular net that captures uropathogenic bacteria and facilitates their clearance. Despite the functional importance of its homopolymers, no structural information is available on UMOD and how it self-assembles into filaments. Here, we report the crystal structures of polymerization regions of human UMOD and mouse ZP2, an essential sperm receptor protein that is structurally related to UMOD but forms heteropolymers. The structure of UMOD reveals that an extensive hydrophobic interface mediates ZP-N domain homodimerization. This arrangement is required for filament formation and is directed by an ordered ZP-N/ZP-C linker that is not observed in ZP2 but is conserved in the sequence of deafness/Crohn's disease-associated homopolymeric glycoproteins α-tectorin (TECTA) and glycoprotein 2 (GP2). Our data provide an example of how interdomain linker plasticity can modulate the function of structurally similar multidomain proteins. Moreover, the architecture of UMOD rationalizes numerous pathogenic mutations in both UMOD and TECTA genes.

  • Organizational Affiliation

    Department of Biosciences and Nutrition & Center for Innovative Medicine, Karolinska Institutet, SE-141 83 Huddinge, Sweden;

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Maltose-binding periplasmic protein,Uromodulin
A, B
695Escherichia coli O157:H7Homo sapiens
This entity is chimeric
Mutation(s): 17 
Gene Names: malEZ5632ECs5017UMOD
UniProt & NIH Common Fund Data Resources
Find proteins for P07911 (Homo sapiens)
Explore P07911 
Go to UniProtKB:  P07911
PHAROS:  P07911
GTEx:  ENSG00000169344 
Find proteins for P0AEY0 (Escherichia coli O157:H7)
Explore P0AEY0 
Go to UniProtKB:  P0AEY0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsP07911P0AEY0
Sequence Annotations
  • Reference Sequence


Entity ID: 2
MoleculeChains Length2D Diagram Glycosylation3D Interactions
C, D
Glycosylation Resources
GlyTouCan:  G07411ON
GlyCosmos:  G07411ON
Biologically Interesting Molecules (External Reference) 1 Unique
Experimental Data & Validation

Experimental Data

  • Resolution: 3.20 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.222 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 242.32α = 90
b = 242.32β = 90
c = 258.86γ = 120
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Karolinska InstitutetSweden--
Center for BiosciencesSweden--
Swedish Research CouncilSweden2012-5093
Gustafsson Foundation for Research in Natural Sciences and MedicineSweden--
Sven and Ebba-Christina Hagberg foundationSweden--
European Molecular Biology Organization--
European UnionERC 260759

Revision History  (Full details and data files)

  • Version 1.0: 2016-01-27
    Type: Initial release
  • Version 1.1: 2016-02-10
    Changes: Database references
  • Version 1.2: 2016-02-17
    Changes: Database references
  • Version 1.3: 2017-09-06
    Changes: Author supporting evidence
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Non-polymer description, Structure summary
  • Version 2.1: 2024-01-10
    Changes: Data collection, Database references, Refinement description, Structure summary