3PKQ

Q83D Variant of S. Enterica RmlA with dGTP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.215 

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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Expanding the Nucleotide and Sugar 1-Phosphate Promiscuity of Nucleotidyltransferase RmlA via Directed Evolution.

Moretti, R.Chang, A.Peltier-Pain, P.Bingman, C.A.Phillips, G.N.Thorson, J.S.

(2011) J Biol Chem 286: 13235-13243

  • DOI: 10.1074/jbc.M110.206433
  • Primary Citation of Related Structures:  
    3PKP, 3PKQ

  • PubMed Abstract: 
  • Directed evolution is a valuable technique to improve enzyme activity in the absence of a priori structural knowledge, which can be typically enhanced via structure-guided strategies. In this study, a combination of both whole-gene error-prone polymerase chain reaction and site-saturation mutagenesis enabled the rapid identification of mutations that improved RmlA activity toward non-native substrates ...

    Directed evolution is a valuable technique to improve enzyme activity in the absence of a priori structural knowledge, which can be typically enhanced via structure-guided strategies. In this study, a combination of both whole-gene error-prone polymerase chain reaction and site-saturation mutagenesis enabled the rapid identification of mutations that improved RmlA activity toward non-native substrates. These mutations have been shown to improve activities over 10-fold for several targeted substrates, including non-native pyrimidine- and purine-based NTPs as well as non-native D- and L-sugars (both α- and β-isomers). This study highlights the first broadly applicable high throughput sugar-1-phosphate nucleotidyltransferase screen and the first proof of concept for the directed evolution of this enzyme class toward the identification of uniquely permissive RmlA variants.


    Organizational Affiliation

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



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Glucose-1-phosphate thymidylyltransferaseA, B, C, D292Salmonella enterica subsp. enterica serovar TyphimuriumMutation(s): 1 
Gene Names: rfbArmlASTM2095
EC: 2.7.7.24
UniProt
Find proteins for P26393 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Explore P26393 
Go to UniProtKB:  P26393
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP26393
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.215 
  • Space Group: P 41
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 109.4α = 90
b = 109.4β = 90
c = 110.075γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
MOLREPphasing
PHENIXrefinement
PDB_EXTRACTdata extraction
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-01-12
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-11-08
    Changes: Refinement description