2ACM

Solution structure of the SEA domain of human mucin 1 (MUC1)


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 15 
  • Selection Criteria: structures with acceptable covalent geometry, structures with the least restraint violations 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Autoproteolysis coupled to protein folding in the SEA domain of the membrane-bound MUC1 mucin

Macao, B.Johansson, D.G.A.Hansson, G.C.Hard, T.

(2006) Nat.Struct.Mol.Biol. 13: 71-76

  • DOI: 10.1038/nsmb1035

  • PubMed Abstract: 
  • The single cell layer of the lungs and the gastrointestinal tract is protected by the mucus formed by large glycoproteins called mucins. Transmembrane mucins typically contain 110-residue SEA domains located next to the membrane. These domains underg ...

    The single cell layer of the lungs and the gastrointestinal tract is protected by the mucus formed by large glycoproteins called mucins. Transmembrane mucins typically contain 110-residue SEA domains located next to the membrane. These domains undergo post-translational cleavage between glycine and serine in a characteristic GSVVV sequence, but the two peptides remain tightly associated. We show that the SEA domain of the human MUC1 transmembrane mucin undergoes a novel type of autoproteolysis, which is catalyzed by conformational stress and the conserved serine hydroxyl. We propose that self-cleaving SEA domains have evolved to dissociate as a result of mechanical rather than chemical stress at the apical cell membrane and that this protects epithelial cells from rupture. We further suggest that the cell can register mechanical shear at the mucosal surface if the dissociation is signaled via loss of a SEA-binding protein.


    Organizational Affiliation

    Department of Medical Biochemistry, Göteborg University, Box 440, SE-405 30 Göteborg, Sweden.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Mucin-1
A
66Homo sapiensMutation(s): 0 
Gene Names: MUC1 (PUM)
Find proteins for P15941 (Homo sapiens)
Go to Gene View: MUC1
Go to UniProtKB:  P15941
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Mucin-1
B
55Homo sapiensMutation(s): 0 
Gene Names: MUC1 (PUM)
Find proteins for P15941 (Homo sapiens)
Go to Gene View: MUC1
Go to UniProtKB:  P15941
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 15 
  • Selection Criteria: structures with acceptable covalent geometry, structures with the least restraint violations 
  • Olderado: 2ACM Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-01-17
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance