2X6Q

Crystal structure of trehalose synthase TreT from P.horikoshi

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.227 

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This is version 1.2 of the entry. See complete history. 


Literature

Structural Insights on the New Mechanism of Trehalose Synthesis by Trehalose Synthase Tret from Pyrococcus Horikoshii.

Woo, E.-J., Ryu, S., Song, H.-N., Jung, T.-Y., Yeon, S., Lee, H., Park, B.C., Park, K., Lee, S.-B.

(2010) J Mol Biol 404: 247

  • DOI: 10.1016/j.jmb.2010.09.056
  • Primary Citation of Related Structures:  
    2X6Q, 2X6R, 2XA9, 2XA1, 2XA2, 2XMP

  • PubMed Abstract: 

    • Many microorganisms produce trehalose for stability and survival against various environmental stresses. Unlike the widely distributed trehalose-biosynthetic pathway, which utilizes uridine diphosphate glucose and glucose-6-phosphate, the newly identified enzyme trehalose glycosyltransferring synthase (TreT) from hyperthermophilic bacteria and archaea synthesizes an α,α-trehalose from nucleoside diphosphate glucose and glucose ...

    Many microorganisms produce trehalose for stability and survival against various environmental stresses. Unlike the widely distributed trehalose-biosynthetic pathway, which utilizes uridine diphosphate glucose and glucose-6-phosphate, the newly identified enzyme trehalose glycosyltransferring synthase (TreT) from hyperthermophilic bacteria and archaea synthesizes an α,α-trehalose from nucleoside diphosphate glucose and glucose. In the present study, we determined the crystal structure of TreT from Pyrococcus horikoshii at 2.3 Å resolution to understand the detailed mechanism of this novel trehalose synthase. The conservation of essential residues in TreT and the high overall structural similarity of the N-terminal domain to that of trehalose phosphate synthase (TPS) imply that the catalytic reaction of TreT for trehalose synthesis would follow a similar mechanism to that of TPS. The acceptor binding site of TreT shows a wide and commodious groove and lacks the long flexible loop that plays a gating role in ligand binding in TPS. The observation of a wide space at the fissure between two domains and the relative shift of the N-domain in one of the crystal forms suggest that an interactive conformational change between two domains would occur, allowing a more compact architecture for catalysis. The structural analysis and biochemical data in this study provide a molecular basis for understanding the synthetic mechanism of trehalose, or the nucleotide sugar in reverse reaction of the TreT, in extremophiles that may have important industrial implications.

    Organizational Affiliation: 

    Medical Proteomics Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejon 305-806, Republic of Korea. ejwoo@kribb.re.kr



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TREHALOSE-SYNTHASE TRETA, B416Pyrococcus horikoshiiMutation(s): 0 
EC: 2.4.1.245
UniProt
Find proteins for O58762 (Pyrococcus horikoshii (strain ATCC 700860 / DSM 12428 / JCM 9974 / NBRC 100139 / OT-3))
Explore O58762 
Go to UniProtKB:  O58762
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.227 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 80.788α = 90
b = 63.655β = 99.41
c = 90.651γ = 90
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-10-13
    Type: Initial release
  • Version 1.1: 2011-05-26
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance