1SS1

STAPHYLOCOCCAL PROTEIN A, B-DOMAIN, Y15W MUTANT, NMR, 25 STRUCTURES


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 103 
  • Conformers Submitted: 26 
  • Selection Criteria: back calculated data agree with experimental NOESY spectrum,structures with acceptable covalent geometry,structures with the least restraint violations 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

From The Cover: Testing protein-folding simulations by experiment: B domain of protein A.

Sato, S.Religa, T.L.Daggett, V.Fersht, A.R.

(2004) Proc Natl Acad Sci U S A 101: 6952-6956

  • DOI: 10.1073/pnas.0401396101
  • Primary Citation of Related Structures:  
    1SS1

  • PubMed Abstract: 
  • We have assessed the published predictions of the pathway of folding of the B domain of protein A, the pathway most studied by computer simulation. We analyzed the transition state for folding of the three-helix bundle protein, by using experimental Phi values on some 70 suitable mutants ...

    We have assessed the published predictions of the pathway of folding of the B domain of protein A, the pathway most studied by computer simulation. We analyzed the transition state for folding of the three-helix bundle protein, by using experimental Phi values on some 70 suitable mutants. Surprisingly, the third helix, which has the most stable alpha-helical structure as a peptide fragment, is poorly formed in the transition state, especially at its C terminus. The protein folds around a nearly fully formed central helix, which is stabilized by extensive hydrophobic side chain interactions. The turn connecting the poorly structured first helix to the central helix is unstructured, but the turn connecting the central helix to the third is in the process of being formed as the N-terminal region of the third helix begins to coalesce. The transition state is inconsistent with a classical framework mechanism and is closer to nucleation-condensation. None of the published atomistic simulations are fully consistent with the experimental picture although many capture important features. There is a continuing need for combining simulation with experiment to describe folding pathways, and of continued testing to improve predictive methods.


    Organizational Affiliation

    Medical Research Council Centre for Protein Engineering, Hills Road, Cambridge CB2 2QH, United Kingdom.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Immunoglobulin G binding protein A A62Staphylococcus aureusMutation(s): 1 
Gene Names: spa
Find proteins for P38507 (Staphylococcus aureus)
Explore P38507 
Go to UniProtKB:  P38507
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 103 
  • Conformers Submitted: 26 
  • Selection Criteria: back calculated data agree with experimental NOESY spectrum,structures with acceptable covalent geometry,structures with the least restraint violations 
  • OLDERADO: 1SS1 Olderado

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-04-06
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance