1C54

SOLUTION STRUCTURE OF RIBONUCLEASE SA


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 40 
  • Conformers Submitted: 20 
  • Selection Criteria: LOWEST ENERGY AND REPRESENTATIVE OF DIFFERENT CONFORMERS 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Solution structure and dynamics of ribonuclease Sa.

Laurents, D.Perez-Canadillas, J.M.Santoro, J.Rico, M.Schell, D.Pace, C.N.Bruix, M.

(2001) Proteins 44: 200-211


  • PubMed Abstract: 
  • We have used NMR methods to characterize the structure and dynamics of ribonuclease Sa in solution. The solution structure of RNase Sa was obtained using the distance constraints provided by 2,276 NOEs and the C6-C96 disulfide bond. The 40 resulting ...

    We have used NMR methods to characterize the structure and dynamics of ribonuclease Sa in solution. The solution structure of RNase Sa was obtained using the distance constraints provided by 2,276 NOEs and the C6-C96 disulfide bond. The 40 resulting structures are well determined; their mean pairwise RMSD is 0.76 A (backbone) and 1.26 A (heavy atoms). The solution structures are similar to previously determined crystal structures, especially in the secondary structure, but exhibit new features: the loop composed of Pro 45 to Ser 48 adopts distinct conformations and the rings of tyrosines 51, 52, and 55 have reduced flipping rates. Amide protons with greatly reduced exchange rates are found predominantly in interior beta-strands and the alpha-helix, but also in the external 3/10 helix and edge beta-strand linked by the disulfide bond. Analysis of (15)N relaxation experiments (R1, R2, and NOE) at 600 MHz revealed five segments, consisting of residues 1-5, 28-31, 46-50, 60-65, 74-77, retaining flexibility in solution. The change in conformation entropy for RNase SA folding is smaller than previously believed, since the native protein is more flexible in solution than in a crystal.


    Related Citations: 
    • Ribonucelase from Streptomyces Aureofaciens at Atomic Resolution
      Sevcik, J.,Dauter, Z.,Lamzin, V.S.,Wilson, K.S.
      (1996) Acta Crystallogr.,Sect.D 52: 327
    • Sequential Assignment and Solution Secondary Structure of Doubly Labelled Ribonuclease Sa
      Laurents, D.V.,Canadillas-Perez, J.M.,Santoro, J.,Schell, D.,Pace, C.N.,Rico, M.,Bruix, M.
      (1999) J.Biomol.NMR 14: 89


    Organizational Affiliation

    Instituto de Estructura de la Materia, CSIC, Madrid, Spain.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
RIBONUCLEASE SA
A
96Kitasatospora aureofaciensMutation(s): 0 
Gene Names: rnaSA
EC: 3.1.27.3
Find proteins for P05798 (Kitasatospora aureofaciens)
Go to UniProtKB:  P05798
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 40 
  • Conformers Submitted: 20 
  • Selection Criteria: LOWEST ENERGY AND REPRESENTATIVE OF DIFFERENT CONFORMERS 
  • Olderado: 1C54 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-11-28
    Type: Initial release
  • Version 1.1: 2008-04-26
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance