4UOY

Crystal structure of YgjG in complex with Pyridoxal-5'-phosphate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.31 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.182 

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Literature

Structure of Putrescine Aminotransferase from Escherichia Coli Provides Insights Into the Substrate Specificity Among Class III Aminotransferases.

Cha, H.J.Jeong, J.Rojviriya, C.Kim, Y.

(2014) PLoS One 9: 13212

  • DOI: 10.1371/journal.pone.0113212
  • Primary Citation of Related Structures:  
    4UOX, 4UOY

  • PubMed Abstract: 
  • YgjG is a putrescine aminotransferase enzyme that transfers amino groups from compounds with terminal primary amines to compounds with an aldehyde group using pyridoxal-5'-phosphate (PLP) as a cofactor. Previous biochemical data show that the enzyme prefers primary diamines, such as putrescine, over ornithine as a substrate ...

    YgjG is a putrescine aminotransferase enzyme that transfers amino groups from compounds with terminal primary amines to compounds with an aldehyde group using pyridoxal-5'-phosphate (PLP) as a cofactor. Previous biochemical data show that the enzyme prefers primary diamines, such as putrescine, over ornithine as a substrate. To better understand the enzyme's substrate specificity, crystal structures of YgjG from Escherichia coli were determined at 2.3 and 2.1 Å resolutions for the free and putrescine-bound enzymes, respectively. Sequence and structural analyses revealed that YgjG forms a dimer that adopts a class III PLP-dependent aminotransferase fold. A structural comparison between YgjG and other class III aminotransferases revealed that their structures are similar. However, YgjG has an additional N-terminal helical structure that partially contributes to a dimeric interaction with the other subunit via a helix-helix interaction. Interestingly, the YgjG substrate-binding site entrance size and charge distribution are smaller and more hydrophobic than other class III aminotransferases, which suggest that YgjG has a unique substrate binding site that could accommodate primary aliphatic diamine substrates, including putrescine. The YgjG crystal structures provide structural clues to putrescine aminotransferase substrate specificity and binding.


    Organizational Affiliation

    Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang, Korea.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PUTRESCINE AMINOTRANSFERASEA, B, C, D467Escherichia coliMutation(s): 0 
EC: 2.6.1.82 (PDB Primary Data), 2.6.1.29 (UniProt)
UniProt
Find proteins for P42588 (Escherichia coli (strain K12))
Explore P42588 
Go to UniProtKB:  P42588
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.31 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.182 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 120.945α = 90
b = 129.319β = 90
c = 131.102γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
SCALEPACKdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

  • Deposited Date: 2014-06-11 
  • Released Date: 2014-12-10 
  • Deposition Author(s): Jeong, J.H., Kim, Y.G.

Revision History  (Full details and data files)

  • Version 1.0: 2014-12-10
    Type: Initial release