4WF7

Crystal structures of trehalose synthase from Deinococcus radiodurans reveal that a closed conformation is involved in the intramolecular isomerization catalysis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.21 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.160 
  • R-Value Observed: 0.162 

wwPDB Validation 3D Report Full Report



Literature

Structures of trehalose synthase from Deinococcus radiodurans reveal that a closed conformation is involved in catalysis of the intramolecular isomerization.

Wang, Y.L.Chow, S.Y.Lin, Y.T.Hsieh, Y.C.Lee, G.C.Liaw, S.H.

(2014) Acta Crystallogr D Biol Crystallogr 70: 3144-3154

  • DOI: 10.1107/S1399004714022500
  • Primary Citation of Related Structures:  
    4WF7, 4TVU

  • PubMed Abstract: 
  • Trehalose synthase catalyzes the simple conversion of the inexpensive maltose into trehalose with a side reaction of hydrolysis. Here, the crystal structures of the wild type and the N253A mutant of Deinococcus radiodurans trehalose synthase (DrTS) in complex with the inhibitor Tris are reported ...

    Trehalose synthase catalyzes the simple conversion of the inexpensive maltose into trehalose with a side reaction of hydrolysis. Here, the crystal structures of the wild type and the N253A mutant of Deinococcus radiodurans trehalose synthase (DrTS) in complex with the inhibitor Tris are reported. DrTS consists of a catalytic (β/α)8 barrel, subdomain B, a C-terminal β domain and two TS-unique subdomains (S7 and S8). The C-terminal domain and S8 contribute the majority of the dimeric interface. DrTS shares high structural homology with sucrose hydrolase, amylosucrase and sucrose isomerase in complex with sucrose, in particular a virtually identical active-site architecture and a similar substrate-induced rotation of subdomain B. The inhibitor Tris was bound and mimics a sugar at the -1 subsite. A maltose was modelled into the active site, and subsequent mutational analysis suggested that Tyr213, Glu320 and Glu324 are essential within the +1 subsite for the TS activity. In addition, the interaction networks between subdomains B and S7 seal the active-site entrance. Disruption of such networks through the replacement of Arg148 and Asn253 with alanine resulted in a decrease in isomerase activity by 8-9-fold and an increased hydrolase activity by 1.5-1.8-fold. The N253A structure showed a small pore created for water entry. Therefore, our DrTS-Tris may represent a substrate-induced closed conformation that will facilitate intramolecular isomerization and minimize disaccharide hydrolysis.


    Related Citations: 
    • Role of the C-terminal domain of Thermus thermophilus trehalose synthase in the thermophilicity, thermostability, and efficient production of trehalose.
      Wang, J.H., Tsai, M.Y., Chen, J.J., Lee, G.C., Shaw, J.F.
      (2007) J Agric Food Chem --: 3435

    Organizational Affiliation

    Institute of Biochemistry and Molecular Biology, National Yang-Ming University, Taipei 11221, Taiwan.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Trehalose synthaseABCD571Deinococcus radiodurans R1Mutation(s): 4 
EC: 5.4.99.16
Find proteins for I3NX86 (Deinococcus radiodurans (strain ATCC 13939 / DSM 20539 / JCM 16871 / LMG 4051 / NBRC 15346 / NCIMB 9279 / R1 / VKM B-1422))
Explore I3NX86 
Go to UniProtKB:  I3NX86
Protein Feature View
Expand
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
TRS
Query on TRS

Download CCD File 
A, B, C, D
2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL
C4 H12 N O3
LENZDBCJOHFCAS-UHFFFAOYSA-O
 Ligand Interaction
CA
Query on CA

Download CCD File 
A, B, C, D
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.21 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.160 
  • R-Value Observed: 0.162 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 96.25α = 90
b = 133.705β = 90
c = 196.614γ = 90
Software Package:
Software NamePurpose
SCALEPACKdata reduction
REFMACrefinement
PDB_EXTRACTdata extraction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Science CouncilTaiwanNSC 102-2311-B-101-005-

Revision History 

  • Version 1.0: 2014-12-24
    Type: Initial release