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 

wwPDB Validation 3D Report Full Report


This is version 1.0 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.,Sect.D 68: 996-1002

  • DOI: 10.1107/S0907444912018446

  • 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 amino ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Putative branched-chain amino acid aminotransferase IlvE
A
345Streptococcus mutans serotype c (strain ATCC 700610 / UA159)Gene Names: ilvE
EC: 2.6.1.42
Find proteins for Q8DTW7 (Streptococcus mutans serotype c (strain ATCC 700610 / UA159))
Go to UniProtKB:  Q8DTW7
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.97 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.186 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 76.043α = 90.00
b = 76.043β = 90.00
c = 119.423γ = 120.00
Software Package:
Software NamePurpose
PHENIXrefinement
PHASERphasing
HKL-2000data reduction
HKL-2000data scaling
HKL-2000data collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

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

Revision History 

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