Macromolecule Content

• Total Structure Weight: 10.93 kDa 
• Atom Count: 767 
• Residue Count: 98 
• Unique protein chains: 1

2RQ8

Solution NMR structure of titin I27 domain mutant

• DOI: 10.2210/pdb2RQ8/pdb

• Classification: TRANSFERASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2009-03-05 Released: 2010-02-02 
• Deposition Author(s): Yagawa, K., Oguro, T., Momose, T., Kawano, S., Sato, T., Endo, T.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the least restraint violations 

Literature

Structural basis for unfolding pathway-dependent stability of proteins: Vectorial unfolding vs. global unfolding

Yagawa, K., Yamano, K., Oguro, T., Maeda, M., Sato, T., Momose, T., Kawano, S., Endo, T.

(2010) Protein Sci 

• PubMed: 20095049 
• DOI: 10.1002/pro.346
• Primary Citation of Related Structures:  
  2RQ8


• PubMed Abstract: 
  

Point mutations in proteins can have different effects on protein stability depending on the mechanism of unfolding. In the most interesting case of I27, the Ig-like module of the muscle protein titin, one point mutation (Y9P) yields opposite effects on protein stability during denaturant-induced "global unfolding" versus "vectorial unfolding" by mechanical pulling force or cellular unfolding systems. Here, we assessed the reason for the different effects of the Y9P mutation of I27 on the overall molecular stability and N-terminal unraveling by NMR. We found that the Y9P mutation causes a conformational change that is transmitted through beta-sheet structures to reach the central hydrophobic core in the interior and alters its accessibility to bulk solvent, which leads to destabilization of the hydrophobic core. On the other hand, the Y9P mutation causes a bend in the backbone structure, which leads to the formation of a more stable N-terminal structure probably through enhanced hydrophobic interactions.

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Organizational Affiliation: 

Department of Chemistry, Graduate School of Science, Nagoya University, Chikusa-ku, Nagoya 464-8602, Japan.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Titin	A	98	Homo sapiens	Mutation(s): 4  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

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the least restraint violations 
• OLDERADO: 2RQ8 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2009-03-05 
• Released Date: 2010-02-02 
Deposition Author(s): Yagawa, K., Oguro, T., Momose, T., Kawano, S., Sato, T., Endo, T.

Revision History 

• Version 1.0: 2010-02-02
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance