1NCU

Titin Module M5, N-terminally Extended, NMR


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 16 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

When a module is also a domain: the role of the N terminus in the stability and the dynamics of immunoglobulin domains from titin.

Pfuhl, M.Improta, S.Politous, A.S.Pastore, A.

(1997) J.Mol.Biol. 265: 242-256

  • DOI: 10.1006/jmbi.1996.0725
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • In the course of a structural study of titin, a giant modular protein from muscle, we have reported that N-terminal extension of immunoglobulin-like (Ig-like) domains from titin stabilizes this fold. In order to investigate the structural basis of su ...

    In the course of a structural study of titin, a giant modular protein from muscle, we have reported that N-terminal extension of immunoglobulin-like (Ig-like) domains from titin stabilizes this fold. In order to investigate the structural basis of such an effect, we have solved the structure of NEXTM5, which has six amino acids added to the sequence of M5, a domain for which full structure determination has been previously achieved. In the present work, the structures and the dynamics of M5 and NEXTM5 are compared in the light of data collected for these and other titin domains. In NEXTM5, three out of the six added residues are structured and pack against the nearby BC and FG loops. As a consequence, three new backbone hydrogen bonds are formed with the B strand, extending the A strand by two residues and decreasing the exposed surface area of the loops. Additional contacts which involve the side-chains give rise to a remarkable pH dependence of the stability. Interestingly, no correlation is observed on the NMR time-scale between the overall dynamics of the extended domain and its increased stability. The most noticeable differences between the two constructs are localised around the N terminus, which becomes more rigid upon extension. Since a similar pattern of contacts is observed for other domains of the immunoglobulin I-set, our results are of general relevance for this protein family. Our work might also inspire a more rational approach to the investigation of domain boundaries and their influence on module stability.


    Related Citations: 
    • Tertiary Structure of an Immunoglobulin-Like Domain from the Giant Muscle Protein Titin: A New Member of the I Set
      Pfuhl, M.,Pastore, A.
      (1995) Structure 3: 391
    • Secondary Structure Determination by NMR Spectroscopy of an Immunoglobulin-Like Domain from the Giant Muscle Protein Titin
      Pfuhl, M.,Gautel, M.,Politou, A.S.,Joseph, C.,Pastore, A.
      (1995) J.Biomol.NMR 6: 48
    • Immunoglobulin-Like Modules from Titin I-Band Extensible Components of Muscle Elasticity
      Improta, S.,Politou, A.S.,Pastore, A.
      (1996) Structure 4: 323
    • Immunoglobulin-Type Domains of Titin are Stabilized by Amino-Terminal Extension
      Politou, A.S.,Gautel, M.,Joseph, C.,Pastore, A.
      (1994) FEBS Lett. 352: 27


    Organizational Affiliation

    EMBL, Heidelberg, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TITIN
A
106Homo 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
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 16 
  • Olderado: 1NCU Olderado
Software Package:
Software NamePurpose
X-PLORrefinement
X-PLORphasing
X-PLORmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 1996-08-13 
  • Released Date: 1996-11-08 
  • Deposition Author(s): Pfuhl, M., Pastore, A.

Revision History 

  • Version 1.0: 1996-11-08
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-11-29
    Type: Derived calculations, Other