2WQG | pdb_00002wqg

SAP domain from Tho1: L31W (fluorophore) mutant

• PDB DOI: https://doi.org/10.2210/pdb2WQG/pdb

• Classification: UNKNOWN FUNCTION
• Organism(s): Saccharomyces cerevisiae
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2009-08-21 Released: 2010-02-16 
• Deposition Author(s): Dodson, C.A., Ferguson, N., Rutherford, T.J., Johnson, C.M., Fersht, A.R.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 25 
• Conformers Submitted: 25 
• Selection Criteria: STRUCTURES REACHING ACCEPTANCE CRITERIA OF MINIMUM RESTRAINT VIOLATION 

Literature

Engineering a Two-Helix Bundle Protein for Folding Studies.

Dodson, C.A., Ferguson, N., Rutherford, T.J., Johnson, C.M., Fersht, A.R.

(2010) Protein Eng Des Sel 23: 357

• PubMed: 20130106 
• DOI: https://doi.org/10.1093/protein/gzp080
• Primary Citation Related Structures: 
  2WQG


• PubMed Abstract: 
  

  The SAP domain from the Saccharomyces cerevisiae THO1 protein contains a hydrophobic core and just two alpha-helices. It could provide a system for studying protein folding that bridges the gap between studies on isolated helices and those on larger protein domains. We have engineered the SAP domain for protein folding studies by inserting a tryptophan residue into the hydrophobic core (L31W) and solved its structure. The helical regions had a backbone root mean-squared deviation of 0.9 A from those of wild type. The mutation L31W destabilised wild type by 0.8 +/- 0.1 kcal mol(-1). The mutant folded in a reversible, apparent two-state manner with a microscopic folding rate constant of around 3700 s(-1) and is suitable for extended studies of folding.

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Organizational Affiliation: 
• MRC Centre for Protein Engineering, Hills Road, Cambridge CB20QH, UK.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 5.66 kDa 
• Atom Count: 397 
• Modeled Residue Count: 51 
• Deposited Residue Count: 51 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN THO1	A	51	Saccharomyces cerevisiae	Mutation(s): 1
UniProt
Find proteins for P40040 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c)) Explore P40040  Go to UniProtKB:  P40040

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 25 
• Conformers Submitted: 25 
• Selection Criteria: STRUCTURES REACHING ACCEPTANCE CRITERIA OF MINIMUM RESTRAINT VIOLATION 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2010-02-16 
Deposition Author(s): Dodson, C.A., Ferguson, N., Rutherford, T.J., Johnson, C.M., Fersht, A.R.

Revision History  

• Version 1.0: 2010-02-16
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2018-01-24
  Changes: Source and taxonomy
• Version 1.4: 2024-05-15
  Changes: Data collection, Database references, Other