High resolution solution structure of human intestinal trefoil factor

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 85 

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This is version 1.3 of the entry. See complete history


High-Resolution Solution Structure of Human Intestinal Trefoil Factor and Functional Insights from Detailed Structural Comparisons with the Other Members of the Trefoil Family of Mammalian Cell Motility Factors

Lemercinier, X.Muskett, F.W.Cheeseman, B.Mcintosh, P.B.Thim, L.Carr, M.D.

(2001) Biochemistry 40: 9552

  • DOI: https://doi.org/10.1021/bi010184+
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The secreted proteins intestinal trefoil factor (ITF, 59 residues), pS2 (60 residues), and spasmolytic polypeptide (SP, 106 residues) form a small family of trefoil domain-containing mammalian cell motility factors, which are essential for the maintenance of all mucous-coated epithelial surfaces. We have used 1H NMR spectroscopy to determine the high-resolution structure of human ITF, which has allowed detailed structural comparisons with the other trefoil cell motility factors. The conformation of residues 10-53 of hITF is determined to high precision, but the structure of the N- and C-terrminal residues is poorly defined by the NMR data, which is probably indicative of significant mobility. The core of the trefoil domain in hITF consists of a two-stranded antiparallel beta-sheet (Cys 36 to Asp 39 and Trp 47 to Lys 50), which is capped by an irregular loop and forms a central hairpin (loop 3). The beta-sheet is preceded by a short alpha-helix (Lys 29 to Arg 34), with the majority of the remainder of the domain contained in two loops formed from His 25 to Pro 28 (loop 2) and Ala 12 to Arg 18 (loop 1), which lie on either side of the central hairpin. The region formed by the surface of loop 2, the cleft between loop 2 and loop 3, and the adjacent face of loop 3 has previously been proposed to form the functional site of trefoil domains. Detailed comparisons of the backbone conformations and surface features of the family of trefoil cell motility factors (porcine SP, pS2, and hITF) have identified significant structural and electrostatic differences in the loop 2/loop 3 regions, which suggest that each trefoil protein has a specific target or group of target molecules.

  • Organizational Affiliation

    Laboratory of Molecular Structure, National Institute for Biological Standards and Control, Potters Bar, Hertfordshire, UK.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
INTESTINAL TREFOIL FACTOR59Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q07654 (Homo sapiens)
Explore Q07654 
Go to UniProtKB:  Q07654
GTEx:  ENSG00000160180 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ07654
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 85 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-12-08
    Type: Initial release
  • Version 1.1: 2017-04-19
    Changes: Other
  • Version 1.2: 2020-01-15
    Changes: Other
  • Version 1.3: 2023-06-14
    Changes: Database references, Derived calculations, Other