Crystal Structure Analysis of a recombinant predicted acetamidase/ formamidase from the thermophile thermoanaerobacter tengcongensis

Experimental Data Snapshot

  • Resolution: 1.99 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.177 

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Crystal Structure Analysis of a Recombinant Predicted Acetamidase/Formamidase from the Thermophile Thermoanaerobacter tengcongensis.

Qian, M.Huang, Q.Wu, G.Lai, L.Tang, Y.Pei, J.Kusunoki, M.

(2012) Protein J 31: 166-174

  • DOI: https://doi.org/10.1007/s10930-011-9387-0
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The structure of acetamidase/formamidase (Amds/Fmds) from the archaeon Thermoanaerobacter tengcongensis has been determined by X-ray diffraction analysis using MAD data in a crystal of space group P2₁, with unit-cell parameters a = 41.23 (3), b = 152.88 (6), c = 100.26 (7) Å, β = 99.49 (3) ° and been refined to a crystallographic R-factor of 17.4% and R-free of 23.7%. It contains two dimers in one asymmetric unit, in which native Amds/Fmds (TE19) contains of the 32 kDa native protein. The final model consists of 4 monomer (299 amino acids residues with additional 2 expression tag amino acids residues), 5 Ca²⁺, 4 Zn²⁺ and 853 water molecules. The monomer is composed by the following: an N-domain which is featuring by three-layers β/β/β; a prominent excursion between N-terminal end of strand β₇ and β₁₁, which contains four-stranded antiparallel β sheet; an C-domain which is formed by the last 82 amino acid residues with the feature of mixed α/β structure. The protein contains ion-pair Ca²⁺-Zn²⁺. The portion of three-layer β/β/β along with the loops provides four protein ligands to the tightly bound Ca²⁺, three water molecules complete the coordination; and provides five protein ligands to the tightly bound Zn²⁺, one water molecule complete the coordination.

  • Organizational Affiliation

    State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry, Peking University, Beijing, People's Republic of China. qianmx@pku.edu.cn

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Predicted acetamidase/formamidase
A, B, C, D
301Caldanaerobacter subterraneus subsp. tengcongensisMutation(s): 0 
Gene Names: TTE1919
Find proteins for Q8R8S5 (Caldanaerobacter subterraneus subsp. tengcongensis (strain DSM 15242 / JCM 11007 / NBRC 100824 / MB4))
Explore Q8R8S5 
Go to UniProtKB:  Q8R8S5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8R8S5
Sequence Annotations
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
Query on CSD
A, B, C, D
Experimental Data & Validation

Experimental Data

  • Resolution: 1.99 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.177 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 41.23α = 90
b = 152.882β = 99.49
c = 100.255γ = 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: 2011-11-16
    Type: Initial release
  • Version 1.1: 2012-02-08
    Changes: Database references