4YGQ

Crystal structure of HAD phosphatase from Thermococcus onnurineus


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.166 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural basis for the substrate selectivity of a HAD phosphatase from Thermococcus onnurineus NA1

Ngo, T.D.Le, B.V.Subramani, V.K.Nguyen, C.M.T.Lee, H.S.Cho, Y.Kim, K.K.Hwang, H.Y.

(2015) Biochem.Biophys.Res.Commun. 461: 122-127

  • DOI: 10.1016/j.bbrc.2015.03.179
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Proteins in the haloalkaloic acid dehalogenase (HAD) superfamily, which is one of the largest enzyme families, is generally composed of a catalytic core domain and a cap domain. Although proteins in this family show broad substrate specificities, the ...

    Proteins in the haloalkaloic acid dehalogenase (HAD) superfamily, which is one of the largest enzyme families, is generally composed of a catalytic core domain and a cap domain. Although proteins in this family show broad substrate specificities, the mechanisms of their substrate recognition are not well understood. In this study, we identified a new substrate binding motif of HAD proteins from structural and functional analyses, and propose that this motif might be crucial for interacting with hydrophobic rings of substrates. The crystal structure of TON_0338, one of the 17 putative HAD proteins identified in a hyperthermophilic archaeon, Thermococcus onnurineus NA1, was determined as an apo-form at 2.0 Å resolution. In addition, we determined the crystal structure TON_0338 in complex with Mg(2+) or N-cyclohexyl-2-aminoethanesulfonic acid (CHES) at 1.7 Å resolution. Examination of the apo-form and CHES-bound structures revealed that CHES is sandwiched between Trp58 and Trp61, suggesting that this Trp sandwich might function as a substrate recognition motif. In the phosphatase assay, TON_0338 was shown to have high activity for flavin mononucleotide (FMN), and the docking analysis suggested that the flavin of FMN may interact with Trp58 and Trp61 in a way similar to that observed in the crystal structure. Moreover, the replacement of these tryptophan residues significantly reduced the phosphatase activity for FMN. Our results suggest that WxxW may function as a substrate binding motif in HAD proteins, and expand the diversity of their substrate recognition mode.


    Organizational Affiliation

    Department of Molecular Cell Biology, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Suwon 440-746, Republic of Korea.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Hydrolase
A
229Thermococcus onnurineus (strain NA1)Mutation(s): 0 
Find proteins for B6YTD6 (Thermococcus onnurineus (strain NA1))
Go to UniProtKB:  B6YTD6
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
TBU
Query on TBU

Download SDF File 
Download CCD File 
A
TERTIARY-BUTYL ALCOHOL
2-METHYL-2-PROPANOL
C4 H10 O
DKGAVHZHDRPRBM-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.166 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 121.193α = 90.00
b = 62.991β = 106.50
c = 37.541γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-04-22
    Type: Initial release
  • Version 1.1: 2015-06-17
    Type: Database references