Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 
  • Conformers Submitted: 50 
  • Selection Criteria: LEAST RESTRAINT VIOLATION 

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This is version 1.4 of the entry. See complete history


The three-dimensional structure of a type I module from titin: a prototype of intracellular fibronectin type III domains.

Goll, C.M.Pastore, A.Nilges, M.

(1998) Structure 6: 1291-1302

  • DOI: https://doi.org/10.1016/s0969-2126(98)00129-4
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Titin is a huge protein ( approximately 3 MDa) that is present in the contractile unit (sarcomere) of striated muscle and has a key role in muscle assembly and elasticity. Titin is mainly composed of two types of module (type I and II). Type I modules are found exclusively in the region of titin localised in the A band, where they are arranged in a super-repeat pattern that correlates with the ultrastructure of the thick filament. No structure of a titin type I module has been reported so far. We have determined the structure of a representative type I module, A71, using nuclear magnetic resonance (NMR) spectroscopy. The structure has the predicted fibronectin type III fold. Titin-specific conserved residues are either located at the putative module-module interfaces or along one side of the protein surface. Several proline residues that contribute to two stretches in a polyproline II helix conformation are solvent-exposed and line up as a continuous ribbon extending over more than two-thirds of the module surface. Homology models of the type I module N-terminal to A71 (A70) and the double module A70-A71 were used to discuss possible intermodule interactions and their role in module-module orientation. As residues at the module-module interfaces are highly conserved, we speculate that similar interactions govern all of the interfaces between type I modules in titin. This conservation would lead to a regular multiple array of similar surface structures. Such an arrangement would allow arrays of contiguous type I modules to expose multiple proline stretches in a highly regular way and these may act as binding sites for other thick filament proteins.

  • Organizational Affiliation

    EMBL Meyerhofstrasse 1, 69117, Heidelberg, Germany Institut de Biologie Structurale J-P Ebel 41 Avenue des Martyrs, 38027 Grenoble, France.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
TITIN112Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q8WZ42 (Homo sapiens)
Explore Q8WZ42 
Go to UniProtKB:  Q8WZ42
GTEx:  ENSG00000155657 
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UniProt GroupQ8WZ42
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 
  • Conformers Submitted: 50 
  • Selection Criteria: LEAST RESTRAINT VIOLATION 

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1999-08-12
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-02-16
    Changes: Database references, Derived calculations, Other
  • Version 1.4: 2024-05-22
    Changes: Data collection