1WAA

IG27 protein domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.207 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Mechanical Network in Titin Immunoglobulin from Force Distribution Analysis.

Stacklies, W.Vega, M.C.Wilmanns, M.Grater, F.

(2009) Plos Comput.Biol. 5: 00306

  • DOI: 10.1371/journal.pcbi.1000306

  • PubMed Abstract: 
  • The role of mechanical force in cellular processes is increasingly revealed by single molecule experiments and simulations of force-induced transitions in proteins. How the applied force propagates within proteins determines their mechanical behavior ...

    The role of mechanical force in cellular processes is increasingly revealed by single molecule experiments and simulations of force-induced transitions in proteins. How the applied force propagates within proteins determines their mechanical behavior yet remains largely unknown. We present a new method based on molecular dynamics simulations to disclose the distribution of strain in protein structures, here for the newly determined high-resolution crystal structure of I27, a titin immunoglobulin (IG) domain. We obtain a sparse, spatially connected, and highly anisotropic mechanical network. This allows us to detect load-bearing motifs composed of interstrand hydrogen bonds and hydrophobic core interactions, including parts distal to the site to which force was applied. The role of the force distribution pattern for mechanical stability is tested by in silico unfolding of I27 mutants. We then compare the observed force pattern to the sparse network of coevolved residues found in this family. We find a remarkable overlap, suggesting the force distribution to reflect constraints for the evolutionary design of mechanical resistance in the IG family. The force distribution analysis provides a molecular interpretation of coevolution and opens the road to the study of the mechanism of signal propagation in proteins in general.


    Organizational Affiliation

    CAS-MPG Partner Institute for Computational Biology, Shanghai, People's Republic of China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TITIN
A, B, C, D
93Homo sapiensMutation(s): 0 
Gene Names: TTN
EC: 2.7.11.1
Find proteins for Q8WZ42 (Homo sapiens)
Go to Gene View: TTN
Go to UniProtKB:  Q8WZ42
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
TITIN
E
93Homo sapiensMutation(s): 0 
Gene Names: TTN
EC: 2.7.11.1
Find proteins for Q8WZ42 (Homo sapiens)
Go to Gene View: TTN
Go to UniProtKB:  Q8WZ42
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
TITIN
F
93Homo sapiensMutation(s): 0 
Gene Names: TTN
EC: 2.7.11.1
Find proteins for Q8WZ42 (Homo sapiens)
Go to Gene View: TTN
Go to UniProtKB:  Q8WZ42
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, B, C, D, E, F
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.207 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 62.240α = 90.00
b = 75.990β = 90.00
c = 134.220γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
REFMACrefinement
SCALAdata scaling
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-07-05
    Type: Initial release
  • Version 1.1: 2011-12-28
    Type: Database references, Derived calculations, Non-polymer description, Other, Refinement description, Version format compliance