Crystal structure of sulfoacetaldehyde reductase from Bifidobacterium kashiwanohense in complex with NAD+

Experimental Data Snapshot

  • Resolution: 3.01 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.204 

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Identification and characterization of a new sulfoacetaldehyde reductase from the human gut bacteriumBifidobacterium kashiwanohense.

Zhou, Y.Wei, Y.Nanjaraj Urs, A.N.Lin, L.Xu, T.Hu, Y.Ang, E.L.Zhao, H.Yuchi, Z.Zhang, Y.

(2019) Biosci Rep 39

  • DOI: https://doi.org/10.1042/BSR20190715
  • Primary Citation of Related Structures:  
    6JKO, 6JKP

  • PubMed Abstract: 

    Hydroxyethylsulfonate (isethionate (Ise)) present in mammalian tissues is thought to be derived from aminoethylsulfonate (taurine), as a byproduct of taurine nitrogen assimilation by certain anaerobic bacteria inhabiting the taurine-rich mammalian gut. In previously studied pathways occurring in environmental bacteria, isethionate is generated by the enzyme sulfoacetaldehyde reductase IsfD, belonging to the short-chain dehydrogenase/reductase (SDR) family. An unrelated sulfoacetaldehyde reductase SarD, belonging to the metal-dependent alcohol dehydrogenase superfamily (M-ADH), was recently discovered in the human gut sulfite-reducing bacterium Bilophila wadsworthia ( Bw SarD). Here we report the structural and biochemical characterization of a sulfoacetaldehyde reductase from the human gut fermenting bacterium Bifidobacterium kashiwanohense ( Bk TauF). Bk TauF belongs to the M-ADH family, but is distantly related to Bw SarD (28% sequence identity). The crystal structures of Bk TauF in the apo form and in a binary complex with NAD + were determined at 1.9 and 3.0 Å resolution, respectively. Mutagenesis studies were carried out to investigate the involvement of active site residues in binding the sulfonate substrate. Our studies demonstrate the presence of sulfoacetaldehyde reductase in Bifidobacteria , with a possible role in isethionate production as a byproduct of taurine nitrogen assimilation.

  • Organizational Affiliation

    Tianjin Key Laboratory for Modern Drug Delivery and High-Efficiency, Collaborative Innovation Center of Chemical Science and Engineering, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Methanol dehydrogenase
A, B, C, D
380Bifidobacterium catenulatum PV20-2Mutation(s): 0 
Gene Names: AH68_00250
Find proteins for A0A0A7I0A5 (Bifidobacterium catenulatum PV20-2)
Explore A0A0A7I0A5 
Go to UniProtKB:  A0A0A7I0A5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A0A7I0A5
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.01 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.204 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 70.881α = 90
b = 112.317β = 107.53
c = 93.573γ = 90
Software Package:
Software NamePurpose
HKL-2000data scaling
PDB_EXTRACTdata extraction
HKL-3000data reduction

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Science Foundation (China)China31570060
National Science Foundation (China)China31870049
Ministry of Science and Technology (China)China--

Revision History  (Full details and data files)

  • Version 1.0: 2019-06-12
    Type: Initial release
  • Version 1.1: 2019-07-03
    Changes: Data collection, Database references
  • Version 1.2: 2023-11-22
    Changes: Data collection, Database references, Refinement description