1C0B

BOVINE PANCREATIC RIBONUCLEASE A DESICCATED FOR 2.5 DAYS

  • Classification: HYDROLASE
  • Organism(s): Bos taurus
  • Mutation(s): No 

  • Deposited: 1999-07-15 Released: 1999-10-14 
  • Deposition Author(s): Bell, J.A.

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.207 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

X-ray crystal structures of a severely desiccated protein

Bell, J.A.

(1999) Protein Sci 8: 2033-2040

  • DOI: https://doi.org/10.1110/ps.8.10.2033
  • Primary Citation of Related Structures:  
    1C0B, 1C0C

  • PubMed Abstract: 

    Unlike most protein crystals, form IX of bovine pancreatic ribonuclease A diffracts well when severely dehydrated. Crystal structures have been solved after 2.5 and 4 days of desiccation with CaSO4, at 1.9 and 2.0 A resolution, respectively. The two desiccated structures are very similar. An RMS displacement of 1.6 A is observed for main-chain atoms in each structure when compared to the hydrated crystal structure with some large rearrangements observed in loop regions. The structural changes are the result of intermolecular contacts formed by strong electrostatic interactions in the absence of a high dielectric medium. The electron density is very diffuse for some surface loops, consistent with a very disordered structure. This disorder is related to the conformational changes. These results help explain conformational changes during the lyophilization of protein and the associated phenomena of denaturation and molecular memory.


  • Organizational Affiliation

    Division of Molecular Medicine, Wadsworth Center, New York State Department of Health, Albany 12201-0509, USA. bell@wadsworth.org


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
RIBONUCLEASE A128Bos taurusMutation(s): 0 
EC: 3.1.27.5
UniProt
Find proteins for P61823 (Bos taurus)
Explore P61823 
Go to UniProtKB:  P61823
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP61823
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.207 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 35.7α = 90
b = 39.7β = 90
c = 50.8γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
MERLOTphasing
TNTrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Released Date: 1999-10-14 
  • Deposition Author(s): Bell, J.A.

Revision History  (Full details and data files)

  • Version 1.0: 1999-10-14
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance