4J0H

Tannin acyl hydrolase in complex with gallic acid


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.183 
  • R-Value Work: 0.149 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Crystal structure of tannase from Lactobacillus plantarum

Ren, B.Wu, M.Wang, Q.Peng, X.Wen, H.McKinstry, W.J.Chen, Q.

(2013) J.Mol.Biol. --: --

  • DOI: 10.1016/j.jmb.2013.04.032
  • Primary Citation of Related Structures:  4J0C, 4J0D, 4J0G, 4J0I, 4J0J, 4J0K, 4JUI

  • PubMed Abstract: 
  • Tannins are water-soluble polyphenolic compounds in plants. Hydrolyzable tannins are derivatives of gallic acid (3,4,5-trihydroxybenzoic acid) or its meta-depsidic forms that are esterified to polyol, catechin, or triterpenoid units. Tannases are a f ...

    Tannins are water-soluble polyphenolic compounds in plants. Hydrolyzable tannins are derivatives of gallic acid (3,4,5-trihydroxybenzoic acid) or its meta-depsidic forms that are esterified to polyol, catechin, or triterpenoid units. Tannases are a family of esterases that catalyze the hydrolysis of the galloyl ester bond in hydrolyzable tannins to release gallic acid. The enzymes have found wide applications in food, feed, beverage, pharmaceutical, and chemical industries since their discovery more than a century ago, although little is known about them at the molecular level, including the details of the catalytic and substrate binding sites. Here, we report the first three-dimensional structure of a tannase from Lactobacillus plantarum. The enzyme displays an α/β structure, featured by a large cap domain inserted into the classical serine hydrolase fold. A catalytic triad was identified in the structure, which is composed of Ser163, His451, and Asp419. During the binding of gallic acid, the carboxyl group of the molecule forges hydrogen-bonding interactions with the catalytic triad of the enzyme while the three hydroxyl groups make contacts with Asp421, Lys343, and Glu357 to form another hydrogen-bonding network. Mutagenesis studies demonstrated that these residues are indispensable for the activity of the enzyme. Structural studies of the enzyme in complex with a number of substrates indicated that the interactions at the galloyl binding site are the determinant force for the binding of substrates. The single galloyl binding site is responsible for the esterase and depsidase activities of the enzyme.


    Organizational Affiliation

    Materials Science and Engineering, CSIRO, 343 Royal Parade, Parkville, VIC 3052, Australia. bin.ren@csiro.au




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tannase
A, B
491Lactobacillus plantarumGene Names: tanLpl
Find proteins for B3Y018 (Lactobacillus plantarum)
Go to UniProtKB:  B3Y018
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PG4
Query on PG4

Download SDF File 
Download CCD File 
A, B
TETRAETHYLENE GLYCOL
C8 H18 O5
UWHCKJMYHZGTIT-UHFFFAOYSA-N
 Ligand Interaction
PEG
Query on PEG

Download SDF File 
Download CCD File 
A, B
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
GDE
Query on GDE

Download SDF File 
Download CCD File 
A, B
3,4,5-trihydroxybenzoic acid
Gallate
C7 H6 O5
LNTHITQWFMADLM-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.183 
  • R-Value Work: 0.149 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 47.551α = 70.74
b = 62.960β = 85.18
c = 84.474γ = 79.55
Software Package:
Software NamePurpose
Blu-Icedata collection
PHENIXrefinement
SCALAdata scaling
XDSdata reduction
PHENIXmodel building
PHENIXphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-05-22
    Type: Initial release