Crystal structure of DndA from streptomyces lividans

Experimental Data Snapshot

  • Resolution: 2.40 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.194 

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Crystal structure of the cysteine desulfurase DndA from Streptomyces lividans which is involved in DNA phosphorothioation

Chen, F.Zhang, Z.Lin, K.Qian, T.Zhang, Y.You, D.He, X.Wang, Z.Liang, J.Deng, Z.Wu, G.

(2012) PLoS One 7: e36635-e36635

  • DOI: https://doi.org/10.1371/journal.pone.0036635
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    DNA phosphorothioation is widespread among prokaryotes, and might function to restrict gene transfer among different kinds of bacteria. There has been little investigation into the structural mechanism of the DNA phosphorothioation process. DndA is a cysteine desulfurase which is involved in the first step of DNA phosphorothioation. In this study, we determined the crystal structure of Streptomyces lividans DndA in complex with its covalently bound cofactor PLP, to a resolution of 2.4 Å. Our structure reveals the molecular mechanism that DndA employs to recognize its cofactor PLP, and suggests the potential binding site for the substrate L-cysteine on DndA. In contrast to previously determined structures of cysteine desulfurases, the catalytic cysteine of DndA was found to reside on a β strand. This catalytic cysteine is very far away from the presumable location of the substrate, suggesting that a conformational change of DndA is required during the catalysis process to bring the catalytic cysteine close to the substrate cysteine. Moreover, our in vitro enzymatic assay results suggested that this conformational change is unlikely to be a simple result of random thermal motion, since moving the catalytic cysteine two residues forward or backward in the primary sequence completely disabled the cysteine desulfurase activity of DndA.

  • Organizational Affiliation

    State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Putative uncharacterized protein dndA
A, B
400Streptomyces lividansMutation(s): 1 
Gene Names: dndA
Find proteins for A7TUX7 (Streptomyces lividans)
Explore A7TUX7 
Go to UniProtKB:  A7TUX7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA7TUX7
Sequence Annotations
  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Resolution: 2.40 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.194 
  • Space Group: P 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 77.9α = 90
b = 67.28β = 97.04
c = 85.56γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
PDB_EXTRACTdata extraction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-01-02
    Type: Initial release
  • Version 1.1: 2016-12-21
    Changes: Structure summary
  • Version 1.2: 2024-03-20
    Changes: Data collection, Database references, Derived calculations, Refinement description