4MY5

Crystal structure of the aromatic amino acid aminotransferase from Streptococcus mutants


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.19 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.193 

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This is version 1.3 of the entry. See complete history


Literature

Crystal structure of the aromatic-amino-acid aminotransferase from Streptococcus mutans.

Cong, X.Li, X.Li, S.

(2019) Acta Crystallogr F Struct Biol Commun 75: 141-146

  • DOI: 10.1107/S2053230X18018472
  • Primary Citation of Related Structures:  
    4MY5

  • PubMed Abstract: 
  • Streptococcus mutans, a facultatively aerobic and Gram-positive bacterium, is the primary causative agent of dental caries and contributes to the multispecies biofilm known as dental plaque. In this study, the aromatic-amino-acid aminotransferase from Streptococcus mutans (SmAroAT) was recombinantly expressed in Escherichia coli ...

    Streptococcus mutans, a facultatively aerobic and Gram-positive bacterium, is the primary causative agent of dental caries and contributes to the multispecies biofilm known as dental plaque. In this study, the aromatic-amino-acid aminotransferase from Streptococcus mutans (SmAroAT) was recombinantly expressed in Escherichia coli. An effective purification protocol was established. The recombinant protein was crystallized using the hanging-drop vapor-diffusion method with PEG 3350 as the primary precipitant. The crystal structure of SmAroAT was solved at 2.2 Å resolution by the molecular-replacement method. Structural analysis indicated that the proteins of the aromatic-amino-acid aminotransferase family have conserved structural elements that might play a role in substrate binding. These results may help in obtaining a better understanding of the catabolism and biosynthesis of aromatic amino acids.


    Organizational Affiliation

    Central Laboratory, 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 amino acid aminotransferaseA, C [auth B], D [auth C], B [auth D]393Streptococcus mutans UA159Mutation(s): 0 
Gene Names: SMU_24
EC: 2.6.1
UniProt
Find proteins for Q8DWM1 (Streptococcus mutans serotype c (strain ATCC 700610 / UA159))
Explore Q8DWM1 
Go to UniProtKB:  Q8DWM1
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.19 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.193 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 104.754α = 90
b = 64.257β = 106.77
c = 125.6γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHASESphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-10-01
    Type: Initial release
  • Version 1.1: 2019-02-13
    Changes: Data collection, Database references
  • Version 1.2: 2019-11-20
    Changes: Database references
  • Version 1.3: 2019-12-25
    Changes: Advisory, Derived calculations