D10A E. coli ribonuclease HI

Experimental Data Snapshot

  • Resolution: 1.30 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.223 

Starting Model: experimental
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This is version 1.4 of the entry. See complete history


Native-state energetics of a thermostabilized variant of ribonuclease HI.

Goedken, E.R.Marqusee, S.

(2001) J Mol Biol 314: 863-871

  • DOI: https://doi.org/10.1006/jmbi.2001.5184
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Escherichia coli RNase HI is a well-characterized model system for protein folding and stability. Controlling protein stability is critical for both natural proteins and for the development of engineered proteins that function under extreme conditions. We have used native-state hydrogen exchange on a variant containing the stabilizing mutation Asp10 to alanine in order to determine its residue-specific stabilities. On average, the DeltaG(unf) value for each residue was increased by 2-3 kcal/mol, resulting in a lower relative population of partially unfolded forms. Though increased in stability by a uniform factor, D10A shows a distribution of stabilities in its secondary structural units that is similar to that of E. coli RNase H, but not the closely related protein from Thermus thermophilus. Hence, the simple mutation used to stabilize the enzyme does not recreate the balance of conformational flexibility evolved in the thermophilic protein.

  • Organizational Affiliation

    Department of Molecular and Cell Biology, University of California, 229 Stanley Hall, Berkeley, CA 94720, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
RIBONUCLEASE HI155Escherichia coliMutation(s): 4 
Find proteins for P0A7Y4 (Escherichia coli (strain K12))
Explore P0A7Y4 
Go to UniProtKB:  P0A7Y4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0A7Y4
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.30 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.223 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 37.016α = 90
b = 40.874β = 90
c = 85.305γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-02-27
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2021-10-27
    Changes: Database references
  • Version 1.4: 2023-08-16
    Changes: Data collection, Refinement description