2SOB

SN-OB, OB-FOLD SUB-DOMAIN OF STAPHYLOCOCCAL NUCLEASE, NMR, 10 STRUCTURES


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 10 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

NMR structure of a stable "OB-fold" sub-domain isolated from staphylococcal nuclease.

Alexandrescu, A.T.Gittis, A.G.Abeygunawardana, C.Shortle, D.

(1995) J.Mol.Biol. 250: 134-143

  • DOI: 10.1006/jmbi.1995.0365

  • PubMed Abstract: 
  • Similar folds often occur in proteins with dissimilar sequences. The OB-fold forms a part of the structures of at least seven non-homologous proteins that share either oligonucleotide or oligosaccharide binding functions. A 1-103 fragment correspondi ...

    Similar folds often occur in proteins with dissimilar sequences. The OB-fold forms a part of the structures of at least seven non-homologous proteins that share either oligonucleotide or oligosaccharide binding functions. A 1-103 fragment corresponding to the OB-fold of the 149 amino acid residue staphylococcal nuclease gives NMR spectra characteristic of an unfolded protein, i.e. the wild-type nuclease sequence is insufficient to maintain a stable tertiary structure in the absence of the C-terminal one-third of this single-domain protein. By contrast, the 1-103 fragment of nuclease with the mutations Val66Leu and Gly88Val adopts a stable tertiary structure. The NMR solution structure of this latter fragment is a close variation of the OB-fold found in the X-ray structure of the parent protein. The Val66Leu and Gly88Val mutations appear to stabilize tertiary structure by consolidating the hydrophobic core of the nuclease OB-fold sub-domain. Taken together, these results suggest that recurrent structural motifs such as the OB-fold may in some cases represent vestiges of autonomous folding units that, during evolution, have become integrated into more complex cooperative folding domains.


    Related Citations: 
    • NMR Analysis of the Residual Structure in the Denatured State of an Unusual Mutant of Staphylococcal Nuclease
      Shortle, D.,Abeygunawardana, C.
      (1993) Structure 1: 121
    • Residual Structure in Large Fragments of Staphylococcal Nuclease: Effects of Amino Acid Substitution
      Shortle, D.,Meeker, A.K.
      (1989) Biochemistry 28: 936


    Organizational Affiliation

    Department of Biological Chemistry, Johns Hopkins Medical Institutions, Baltimore, MD 21205, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
STAPHYLOCOCCAL NUCLEASE
A
103Staphylococcus aureusMutation(s): 2 
Gene Names: nuc
EC: 3.1.31.1
Find proteins for P00644 (Staphylococcus aureus)
Go to UniProtKB:  P00644
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 10 
  • Olderado: 2SOB 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

Revision History 

  • Version 1.0: 1995-12-07
    Type: Initial release
  • Version 1.1: 2008-03-25
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance