4DBF

Crystal structures of Cg1458


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.194 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Crystal structures of Cg1458 reveal a catalytic lid domain and a common catalytic mechanism for FAH family.

Ran, T.Gao, Y.Marsh, M.Zhu, W.Wang, M.Mao, X.Xu, L.Xu, D.Wang, W.

(2013) Biochem.J. 449: 51-60

  • DOI: 10.1042/BJ20120913
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Cg1458 was recently characterized as a novel soluble oxaloacetate decarboxylase. However, sequence alignment identified that Cg1458 has no similarity with other oxaloacetate decarboxylases and instead belongs to the FAH (fumarylacetoacetate hydrolase ...

    Cg1458 was recently characterized as a novel soluble oxaloacetate decarboxylase. However, sequence alignment identified that Cg1458 has no similarity with other oxaloacetate decarboxylases and instead belongs to the FAH (fumarylacetoacetate hydrolase) family. Differences in the function of Cg1458 and other FAH proteins may suggest a different catalytic mechanism. To help elucidate the catalytic mechanism of Cg1458, crystal structures of Cg1458 in both the open and closed conformations have been determined for the first time up to a resolution of 1.9 Å (1 Å=0.1 nm) and 2.0 Å respectively. Comparison of both structures and detailed biochemical studies confirmed the presence of a catalytic lid domain which is missing in the native enzyme structure. In this lid domain, a glutamic acid-histidine dyad was found to be critical in mediating enzymatic catalysis. On the basis of structural modelling and comparison, as well as large-scale sequence alignment studies, we further determined that the catalytic mechanism of Cg1458 is actually through a glutamic acid-histidine-water triad, and this catalytic triad is common among FAH family proteins that catalyse the cleavage of the C-C bond of the substrate. Two sequence motifs, HxxE and Hxx…xxE have been identified as the basis for this mechanism.


    Organizational Affiliation

    Key Laboratory of Microbiological Engineering of Agricultural Environment, Ministry of Agriculture, Department of Microbiology, College of Life Sciences, Nanjing Agricultural University, 210095 Nanjing, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
2-HYDROXYHEPTA-2,4-DIENE-1,7-DIOATE ISOMERASE
A, B
288Corynebacterium glutamicum (strain ATCC 13032 / DSM 20300 / JCM 1318 / LMG 3730 / NCIMB 10025)Mutation(s): 0 
EC: 4.1.1.-, 5.3.3.-
Find proteins for Q8NQY2 (Corynebacterium glutamicum (strain ATCC 13032 / DSM 20300 / JCM 1318 / LMG 3730 / NCIMB 10025))
Go to UniProtKB:  Q8NQY2
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download SDF File 
Download CCD File 
A, B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.194 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 124.120α = 90.00
b = 124.120β = 90.00
c = 73.640γ = 90.00
Software Package:
Software NamePurpose
Blu-Icedata collection
XDSdata reduction
XDSdata scaling
PHASERphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-11-28
    Type: Initial release
  • Version 1.1: 2019-12-04
    Type: Data collection, Database references