4DBC

Substrate Activation in Aspartate Aminotransferase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.194 
  • R-Value Work: 0.169 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Ground-state electronic destabilization via hyperconjugation in aspartate aminotransferase.

Griswold, W.R.Castro, J.N.Fisher, A.J.Toney, M.D.

(2012) J.Am.Chem.Soc. 134: 8436-8438

  • DOI: 10.1021/ja302809e

  • PubMed Abstract: 
  • Binding isotope effects for l-aspartate reacting with the inactive K258A mutant of PLP-dependent aspartate aminotransferase to give a stable external aldimine intermediate are reported. They provide direct evidence for electronic ground-state destabi ...

    Binding isotope effects for l-aspartate reacting with the inactive K258A mutant of PLP-dependent aspartate aminotransferase to give a stable external aldimine intermediate are reported. They provide direct evidence for electronic ground-state destabilization via hyperconjugation. The smaller equilibrium isotope effect with deazaPLP-reconstituted K258A indicates that the pyridine nitrogen plays an important role in labilizing the Cα-H bond.


    Organizational Affiliation

    Department of Chemistry, University of California - Davis, 95616, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Aspartate aminotransferase
A
396Escherichia coli (strain K12)Gene Names: aspC
EC: 2.6.1.1
Find proteins for P00509 (Escherichia coli (strain K12))
Go to UniProtKB:  P00509
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
EDO
Query on EDO

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Download CCD File 
A
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
3QP
Query on 3QP

Download SDF File 
Download CCD File 
A
(E)-N-{2-hydroxy-3-methyl-6-[(phosphonooxy)methyl]benzylidene}-L-aspartic acid
C13 H16 N O9 P
CMDDKMGWJXISQE-ZFGNZVLRSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.194 
  • R-Value Work: 0.169 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 84.290α = 90.00
b = 155.250β = 90.00
c = 77.960γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
DENZOdata reduction
SCALAdata scaling
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-12-05
    Type: Initial release