2XA2

Crystal structure of trehalose synthase TreT mutant E326A from P. horikoshii in complex with UDPG


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.225 

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This is version 1.3 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: https://doi.org/10.1016/j.jmb.2010.09.056
  • Primary Citation of Related Structures:  
    2X6Q, 2X6R, 2XA1, 2XA2, 2XA9, 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. 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
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
TREHALOSE-SYNTHASE TRET
A, B
416Pyrococcus horikoshiiMutation(s): 1 
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
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO58762
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.225 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 80.844α = 90
b = 63.139β = 98.83
c = 91.517γ = 90
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-03-16
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-05-08
    Changes: Data collection, Database references, Derived calculations, Other