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 

Starting Model: experimental
View more details

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


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: https://doi.org/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 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)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Putative branched-chain amino acid aminotransferase IlvE345Streptococcus mutansMutation(s): 0 
Gene Names: ilvESMU_1203
EC: 2.6.1.42
UniProt
Find proteins for Q8DTW7 (Streptococcus mutans serotype c (strain ATCC 700610 / UA159))
Explore Q8DTW7 
Go to UniProtKB:  Q8DTW7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8DTW7
Sequence Annotations
Expand
  • 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

Revision History  (Full details and data files)

  • Version 1.0: 2013-01-02
    Type: Initial release
  • Version 1.1: 2023-11-08
    Changes: Data collection, Database references, Refinement description