4DQN

Crystal structure of the branched-chain aminotransferase from Streptococcus mutans


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.97 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.188 

wwPDB Validation   3D Report Full Report


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Literature

Structure of the branched-chain aminotransferase from Streptococcus mutans

Ruan, J.Hu, J.Yin, A.H.Wu, W.Q.Cong, X.Z.Feng, X.T.Li, S.T.

(2012) Acta Crystallogr D Biol Crystallogr 68: 996-1002

  • DOI: 10.1107/S0907444912018446
  • Primary Citation of Related Structures:  
    4DQN

  • PubMed Abstract: 
  • The branched-chain amino-acid aminotransferase from Streptococcus mutans (SmIlvE) was recombinantly expressed in Escherichia coli with high yield. An effective purification protocol was established. A bioactivity assay indicated that SmIlvE had aminotransferase activity ...

    The branched-chain amino-acid aminotransferase from Streptococcus mutans (SmIlvE) was recombinantly expressed in Escherichia coli with high yield. An effective purification protocol was established. A bioactivity assay indicated that SmIlvE had aminotransferase activity. The specific activity of SmIlvE towards amino-acid substrates was found to be as follows (in descending order): Ile > Leu > Val > Trp > Gly. The protein was crystallized using the hanging-drop vapour-diffusion method with PEG 3350 as the primary precipitant. The structure of SmIlvE was solved at 1.97 Å resolution by the molecular-replacement method. Comparison with structures of homologous proteins enabled the identification of conserved structural elements that might play a role in substrate binding. Further work is needed to confirm the interaction between SmIlvE and its substrates by determining the structures of their complexes.


    Organizational Affiliation

    Department of Immunology, School of Basic Medical Sciences, Capital Medical University, Beijing 100069, People's Republic of China.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Putative branched-chain amino acid aminotransferase IlvEA345Streptococcus mutansMutation(s): 0 
Gene Names: ilvESMU_1203
EC: 2.6.1.42
Find proteins for Q8DTW7 (Streptococcus mutans serotype c (strain ATCC 700610 / UA159))
Explore Q8DTW7 
Go to UniProtKB:  Q8DTW7
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.97 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.188 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 76.043α = 90
b = 76.043β = 90
c = 119.423γ = 120
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2012-02-16 
  • Released Date: 2013-01-02 
  • Deposition Author(s): Ruan, J., Li, S.T.

Revision History  (Full details and data files)

  • Version 1.0: 2013-01-02
    Type: Initial release