1MI0

Crystal Structure of the redesigned protein G variant NuG2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.260 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structures and increased stabilization of the protein G variants with switched folding pathways NuG1 and NuG2

Nauli, S.Kuhlman, B.Le Trong, I.Stenkamp, R.E.Teller, D.C.Baker, D.

(2002) Biochemistry 11: 2924-2931

  • DOI: 10.1110/ps.0216902
  • Primary Citation of Related Structures:  1MHX

  • PubMed Abstract: 
  • We recently described two protein G variants (NuG1 and NuG2) with redesigned first hairpins that were almost twice as stable, folded 100-fold faster, and had a switched folding mechanism relative to the wild-type protein. To test the structural accur ...

    We recently described two protein G variants (NuG1 and NuG2) with redesigned first hairpins that were almost twice as stable, folded 100-fold faster, and had a switched folding mechanism relative to the wild-type protein. To test the structural accuracy of our design algorithm and to provide insights to the dramatic changes in the kinetics and thermodynamics of folding, we have now determined the crystal structures of NuG1 and NuG2 to 1.8 A and 1.85 A, respectively. We find that they adopt hairpin structures that are closer to the computational models than to wild-type protein G; the RMSD of the NuG1 hairpin to the design model and the wild-type structure are 1.7 A and 5.1 A, respectively. The crystallographic B factor in the redesigned first hairpin of NuG1 is systematically higher than the second hairpin, suggesting that the redesigned region is somewhat less rigid. A second round of structure-based design yielded new variants of NuG1 and NuG2, which are further stabilized by 0.5 kcal/mole and 0.9 kcal/mole.


    Organizational Affiliation

    Department of Biochemistry, University of Washington, Seattle 98195, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
immunoglobulin-binding protein G
A, B
65Finegoldia magnaN/A
Find proteins for Q53291 (Finegoldia magna)
Go to UniProtKB:  Q53291
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.260 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 47.330α = 90.00
b = 73.790β = 96.00
c = 39.180γ = 90.00
Software Package:
Software NamePurpose
EPMRphasing
DENZOdata reduction
SCALEPACKdata scaling
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-09-18
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Source and taxonomy, Version format compliance