3RSP

STRUCTURE OF THE P93G VARIANT OF RIBONUCLEASE A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Work: 0.170 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure and stability of the P93G variant of ribonuclease A.

Schultz, L.W.Hargraves, S.R.Klink, T.A.Raines, R.T.

(1998) Protein Sci. 7: 1620-1625

  • DOI: 10.1002/pro.5560070716

  • PubMed Abstract: 
  • The peptide bonds preceding Pro 93 and Pro 114 of bovine pancreatic ribonuclease A (RNase A) are in the cis conformation. The trans-to-cis isomerization of these bonds had been indicted as the slow step during protein folding. Here, site-directed mut ...

    The peptide bonds preceding Pro 93 and Pro 114 of bovine pancreatic ribonuclease A (RNase A) are in the cis conformation. The trans-to-cis isomerization of these bonds had been indicted as the slow step during protein folding. Here, site-directed mutagenesis was used to replace Pro 93 or Pro 114 with a glycine residue, and the crystalline structure of the P93G variant was determined by X-ray diffraction analysis to a resolution of 1.7 A. This structure is essentially identical to that of the wild-type protein, except for the 91-94 beta-turn containing the substitution. In the wild-type protein, the beta-turn is of type VIa. In the P93G variant, this turn is of type II with the peptide bond preceding Gly 93 being trans. The thermal stabilities of the P93G and P114G variants were assessed by differential scanning calorimetry and thermal denaturation experiments monitored by ultraviolet spectroscopy. The value of delta deltaGm which reports on the stability lost in the variants, is 1.5-fold greater for the P114G variant than for the P93G variant. The greater stability of the P93G variant is likely due to the relatively facile accommodation of residues 91-94 in a type II turn, which has a preference for a glycine residue in its i + 2 position.


    Organizational Affiliation

    Department of Biochemistry, University of Wisconsin-Madison, 53706-1569, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
RIBONUCLEASE A
A
124Bos taurusMutations: P93G
Gene Names: RNASE1 (RNS1)
EC: 3.1.27.5
Find proteins for P61823 (Bos taurus)
Go to Gene View: RNASE1
Go to UniProtKB:  P61823
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Work: 0.170 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 65.790α = 90.00
b = 65.790β = 90.00
c = 66.120γ = 120.00
Software Package:
Software NamePurpose
TNTrefinement
AMoREphasing
XDSdata scaling
XCALIBREdata reduction
XDSdata reduction
XCALIBREdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-04-22
    Type: Initial release
  • Version 1.1: 2008-03-25
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance