Crystal structure of 2-O-alpha-glucosylglycerol phosphorylase in complex with glucose

Experimental Data Snapshot

  • Resolution: 1.90 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.170 
  • R-Value Observed: 0.172 

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Structural basis for reversible phosphorolysis and hydrolysis reactions of 2-O-alpha-glucosylglycerol phosphorylase

Touhara, K.K.Nihira, T.Kitaoka, M.Nakai, H.Fushinobu, S.

(2014) J Biol Chem 289: 18067-18075

  • DOI: https://doi.org/10.1074/jbc.M114.573212
  • Primary Citation of Related Structures:  
    4KTP, 4KTR

  • PubMed Abstract: 

    2-O-α-Glucosylglycerol phosphorylase (GGP) from Bacillus selenitireducens catalyzes both the reversible phosphorolysis of 2-O-α-glucosylglycerol (GG) and the hydrolysis of β-d-glucose 1-phosphate (βGlc1P). GGP belongs to the glycoside hydrolase (GH) family 65 and can efficiently and specifically produce GG. However, its structural basis has remained unclear. In this study, the crystal structures of GGP complexed with glucose and the glucose analog isofagomine and glycerol were determined. Subsite -1 of GGP is similar to those of other GH65 enzymes, maltose phosphorylase and kojibiose phosphorylase, whereas subsite +1 is largely different and is well designed for GG recognition. An automated docking analysis was performed to complement these crystal structures, βGlc1P being docked at an appropriate position. To investigate the importance of residues at subsite +1 in the bifunctionality of GGP, we constructed mutants at these residues. Y327F and K587A did not show detectable activities for either reverse phosphorolysis or βGlc1P hydrolysis. Y572F also showed significantly reduced activities for both of these reactions. In contrast, W381F showed significantly reduced reverse phosphorolytic activity but retained βGlc1P hydrolysis. The mode of substrate recognition and the reaction mechanisms of GGP were proposed based on these analyses. Specifically, an extensive hydrogen bond network formed by Tyr-327, Tyr-572, Lys-587, and water molecules contributes to fixing the acceptor molecule in both reverse phosphorolysis (glycerol) and βGlc1P hydrolysis (water) for a glycosyl transfer reaction. This study will contribute to the development of a large scale production system of GG by facilitating the rational engineering of GGP.

  • Organizational Affiliation

    From the Department of Biotechnology, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Glycoside hydrolase family 65 central catalytic
A, B
769[Bacillus] selenitireducens MLS10Mutation(s): 1 
Gene Names: Bsel_2816
EC: 2.4.1
Find proteins for D6XZ22 (Bacillus selenitireducens (strain ATCC 700615 / DSM 15326 / MLS10))
Explore D6XZ22 
Go to UniProtKB:  D6XZ22
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupD6XZ22
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.90 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.170 
  • R-Value Observed: 0.172 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 206.076α = 90
b = 76.959β = 128.39
c = 145.766γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-05-21
    Type: Initial release
  • Version 1.1: 2014-05-28
    Changes: Database references
  • Version 1.2: 2014-12-24
    Changes: Database references
  • Version 1.3: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Database references, Derived calculations, Structure summary
  • Version 1.4: 2024-03-20
    Changes: Data collection, Database references, Structure summary