2A38

Crystal structure of the N-Terminus of titin

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.209 

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This is version 1.2 of the entry. See complete history. 


Literature

The Ig doublet Z1Z2: a model system for the hybrid analysis of conformational dynamics in Ig tandems from titin

Marino, M., Zou, P., Svergun, D., Garcia, P., Edlich, C., Simon, B., Wilmanns, M., Muhle-Goll, C., Mayans, O.

(2006) Structure 14: 1437-1447

  • DOI: 10.1016/j.str.2006.07.009
  • Primary Citation of Related Structures:  
    2A38

  • PubMed Abstract: 

    • Titin is a gigantic elastic filament that determines sarcomere ultrastructure and stretch response in vertebrate muscle. It folds into numerous Ig and FnIII domains connected in tandem. Data on interdomain arrangements and dynamics are essential for ...

    Titin is a gigantic elastic filament that determines sarcomere ultrastructure and stretch response in vertebrate muscle. It folds into numerous Ig and FnIII domains connected in tandem. Data on interdomain arrangements and dynamics are essential for understanding the function of this filament. Here, we report a mechanistic analysis of the conformational dynamics of two Ig domains from the N terminus of titin, Z1Z2, by using X-ray crystallography, SAXS, NMR relaxation data, and residual dipolar couplings in combination. Z1Z2 preferentially adopts semiextended conformations in solution, with close-hinge arrangements representing low-probability states. Although interdomain contacts are not observed, the linker appears to acquire moderate rigidity via small, local hydrophobic interactions. Thus, Z1Z2 constitutes an adaptable modular system with restricted dynamics. We speculate that its preexistent conformation contributes to the selective recruitment of the binding partner telethonin onto the repetitive surface of the filament. The structural interconversion of four Z1Z2 conformers is analyzed.

    Related Citations: 
    • Secondary and tertiary structure elasticity of titin Z1Z2 and a titin chain model
      Lee, E.H., Hsin, J., Mayans, O., Schulten, K.
      (2007) Biophys J 93: 1719
    Organizational Affiliation: 

    Division of Structural Biology, Biozentrum, University of Basel, Klingelbergstrasse 70, CH-4056 Basel, Switzerland.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TitinA, B, C194Homo sapiensMutation(s): 0 
Gene Names: TTN
EC: 2.7.11.1
Find proteins for Q8WZ42 (Homo sapiens)
Explore Q8WZ42 
Go to UniProtKB:  Q8WZ42
NIH Common Fund Data Resources
PHAROS  Q8WZ42
GTEx  ENSG00000155657
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CD
Query on CD
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A, B, C
CADMIUM ION
Cd
WLZRMCYVCSSEQC-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.209 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 55.406α = 71.96
b = 56.294β = 88.49
c = 74.414γ = 75.41
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
AMoREphasing
CNSrefinement
CCP4data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-06-24
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance