5EJ4

EcMenD-ThDP-Mn2+ complex soaked with 2-ketoglutarate for 15 min

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.77 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.178 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history. 


Literature

A Thiamine-Dependent Enzyme Utilizes an Active Tetrahedral Intermediate in Vitamin K Biosynthesis

Song, H.G., Dong, C., Qin, M.M., Chen, Y.Z., Sun, Y.R., Liu, J.J., Chan, W., Guo, Z.H.

(2016) J Am Chem Soc 138: 7244-7247

  • DOI: 10.1021/jacs.6b03437
  • Primary Citation of Related Structures:  
    5EJ5, 5EJ4, 5EJ7, 5EJ6, 5EJ9, 5EJ8, 5EJA

  • PubMed Abstract: 

    • Enamine is a well-known reactive intermediate mediating essential thiamine-dependent catalysis in central metabolic pathways. However, this intermediate is not found in the thiamine-dependent catalysis of the vitamin K biosynthetic enzyme MenD. Inste ...

    Enamine is a well-known reactive intermediate mediating essential thiamine-dependent catalysis in central metabolic pathways. However, this intermediate is not found in the thiamine-dependent catalysis of the vitamin K biosynthetic enzyme MenD. Instead, an active tetrahedral post-decarboxylation intermediate is stably formed in the enzyme and was structurally determined at 1.34 Å resolution in crystal. This intermediate takes a unique conformation that allows only one proton between its tetrahedral reaction center and the exo-ring nitrogen atom of the aminopyrimidine moiety in the cofactor with a short distance of 3.0 Å. It is readily convertible to the final product of the enzymic reaction with a solvent-exchangeable proton at its reaction center. These results show that the thiamine-dependent enzyme utilizes a tetrahedral intermediate in a mechanism distinct from the enamine catalytic chemistry.

    Organizational Affiliation: 

    Department of Chemistry, ‡State Key Laboratory for Molecular Neuroscience, and §Environmental Science Program, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong SAR, China.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
2-succinyl-5-enolpyruvyl-6-hydroxy-3-cyclohexene-1-carboxylate synthaseA, B, C, D, E, F, G, H556Escherichia coli K-12Mutation(s): 0 
Gene Names: menD, b2264, JW5374
EC: 2.2.1.9
Find proteins for P17109 (Escherichia coli (strain K12))
Explore P17109 
Go to UniProtKB:  P17109
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
TD6
Query on TD6
Download Ideal Coordinates CCD File 
A, B, C, D, E, F, G, H
(4S)-4-{3-[(4-amino-2-methylpyrimidin-5-yl)methyl]-5-(2-{[(S)-hydroxy(phosphonooxy)phosphoryl]oxy}ethyl)-4-methyl-1,3lambda~5~-thiazol-2-yl}-4-hydroxybutanoic acid
C16 H25 N4 O10 P2 S
RWCNVMPVYGBSHH-LBPRGKRZSA-N		 Ligand Interaction
GOL
Query on GOL
Download Ideal Coordinates CCD File 
A, B, C, D, E, F, G, H
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N		 Ligand Interaction
MN
Query on MN
Download Ideal Coordinates CCD File 
A, B, C, D, E, F, G, H
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N		 Ligand Interaction
FMT
Query on FMT
Download Ideal Coordinates CCD File 
A, B, C, D, E, F, G, H
FORMIC ACID
C H2 O2
BDAGIHXWWSANSR-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.77 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.178 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 90.791α = 83.27
b = 90.771β = 76.01
c = 169.561γ = 64.3
Software Package:
Software NamePurpose
PHENIXrefinement
iMOSFLMdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-06-01
    Type: Initial release
  • Version 1.1: 2016-06-29
    Changes: Database references