MUC2 CysD1 domain

Experimental Data Snapshot

  • Resolution: 1.63 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.177 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Assembly Mechanism of Mucin and von Willebrand Factor Polymers.

Javitt, G.Khmelnitsky, L.Albert, L.Bigman, L.S.Elad, N.Morgenstern, D.Ilani, T.Levy, Y.Diskin, R.Fass, D.

(2020) Cell 183: 717-729.e16

  • DOI: https://doi.org/10.1016/j.cell.2020.09.021
  • Primary Citation of Related Structures:  
    6TM2, 6TM6, 7A5O

  • PubMed Abstract: 

    The respiratory and intestinal tracts are exposed to physical and biological hazards accompanying the intake of air and food. Likewise, the vasculature is threatened by inflammation and trauma. Mucin glycoproteins and the related von Willebrand factor guard the vulnerable cell layers in these diverse systems. Colon mucins additionally house and feed the gut microbiome. Here, we present an integrated structural analysis of the intestinal mucin MUC2. Our findings reveal the shared mechanism by which complex macromolecules responsible for blood clotting, mucociliary clearance, and the intestinal mucosal barrier form protective polymers and hydrogels. Specifically, cryo-electron microscopy and crystal structures show how disulfide-rich bridges and pH-tunable interfaces control successive assembly steps in the endoplasmic reticulum and Golgi apparatus. Remarkably, a densely O-glycosylated mucin domain performs an organizational role in MUC2. The mucin assembly mechanism and its adaptation for hemostasis provide the foundation for rational manipulation of barrier function and coagulation.

  • Organizational Affiliation

    Department of Structural Biology, Weizmann Institute of Science, Rehovot 7610001, Israel. Electronic address: deborah.fass@weizmann.ac.il.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Mucin-297Homo sapiensMutation(s): 0 
Gene Names: MUC2SMUC
UniProt & NIH Common Fund Data Resources
Find proteins for Q02817 (Homo sapiens)
Explore Q02817 
Go to UniProtKB:  Q02817
PHAROS:  Q02817
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ02817
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.63 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.177 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 54.879α = 90
b = 57.854β = 90
c = 27.471γ = 90
Software Package:
Software NamePurpose
HKL-3000data collection

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
European Research Council310649
Israel Science Foundation1775/12

Revision History  (Full details and data files)

  • Version 1.0: 2020-02-19
    Type: Initial release
  • Version 1.1: 2020-03-18
    Changes: Structure summary
  • Version 1.2: 2021-03-03
    Changes: Database references