1JL1

D10A E. coli ribonuclease HI

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.30 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.223 

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This is version 1.2 of the entry. See complete history. 


Literature

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

Goedken, E.R., Marqusee, S.

(2001) J Mol Biol 314: 863-871

  • DOI: 10.1006/jmbi.2001.5184
  • Primary Citation of Related Structures:  
    1JL1

  • 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 ...

    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.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
RIBONUCLEASE HIA155Escherichia coliMutation(s): 4 
EC: 3.1.26.4
UniProt
Find proteins for P0A7Y4 (Escherichia coli (strain K12))
Explore P0A7Y4 
Go to UniProtKB:  P0A7Y4
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • 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
AMoREphasing
REFMACrefinement
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