Crystal structure of L-Aspartate Oxidase from hyperthermophilic archaeon Sulfolobus tokodaii

Experimental Data Snapshot

  • Resolution: 2.09 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.194 

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Structure of l-aspartate oxidase from the hyperthermophilic archaeon Sulfolobus tokodaii

Sakuraba, H.Yoneda, K.Asai, I.Tsuge, H.Katunuma, N.Ohshima, T.

(2008) Biochim Biophys Acta 1784: 563-571

  • DOI: https://doi.org/10.1016/j.bbapap.2007.12.012
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The crystal structure of the highly thermostable l-aspartate oxidase (LAO) from the hyperthermophilic archaeon Sulfolobus tokodaii was determined at a 2.09 A resolution. The factors contributing to the thermostability of the enzyme were analyzed by comparing its structure to that of Escherichia coli LAO. Like E. coli LAO, the S. tokodaii enzyme consists of three domains: an FAD-binding domain, an alpha+beta capping domain, and a C-terminal three-helix bundle. However, the situation of the linker between the FAD-binding domain and C-terminal three-helix bundle in S. tokodaii LAO is completely different from that in E. coli LAO, where the linker is situated near the FAD-binding domain and has virtually no interaction with the rest of the protein. In S. tokodaii LAO, this linker is situated near the C-terminal three-helix bundle and contains a beta-strand that runs parallel to the C-terminal strand. This results in the formation of an additional beta-sheet, which appears to reduce the flexibility of the C-terminal region. Furthermore, the displacement of the linker enables formation of a 5-residue ion-pair network between the FAD-binding and C-terminal domains, which strengthens the interdomain interactions. These features might be the main factors contributing to the high thermostability of S. tokodaii LAO.

  • Organizational Affiliation

    Department of Life System, Institute of Technology and Science, The University of Tokushima, 2-1 Minamijosanjima-cho, Tokushima 770-8506, Japan.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
L-aspartate oxidase
A, B
472Sulfurisphaera tokodaiiMutation(s): 0 
Find proteins for Q972D2 (Sulfurisphaera tokodaii (strain DSM 16993 / JCM 10545 / NBRC 100140 / 7))
Explore Q972D2 
Go to UniProtKB:  Q972D2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ972D2
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.09 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.194 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 54.97α = 90
b = 103.256β = 90
c = 163.817γ = 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: 2008-01-01
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2024-03-13
    Changes: Data collection, Database references, Derived calculations