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 1.3 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
  • Primary Citation of Related Structures:  
    2ACM

  • 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 undergo post-translational cleavage between glycine and serine in a characteristic GSVVV sequence, but the two peptides remain tightly associated ...

    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: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Mucin-1A66Homo sapiensMutation(s): 0 
Gene Names: MUC1, PUM
UniProt & NIH Common Fund Data Resources
Find proteins for P15941 (Homo sapiens)
Explore P15941 
Go to UniProtKB:  P15941
PHAROS:  P15941
GTEx:  ENSG00000185499 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP15941
Protein Feature View
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  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Mucin-1B55Homo sapiensMutation(s): 0 
Gene Names: MUC1, PUM
UniProt & NIH Common Fund Data Resources
Find proteins for P15941 (Homo sapiens)
Explore P15941 
Go to UniProtKB:  P15941
PHAROS:  P15941
GTEx:  ENSG00000185499 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP15941
Protein Feature View
Expand
  • Reference Sequence
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

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-01-17
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-03-09
    Changes: Database references, Derived calculations