Sulfurtransferase from Azotobacter vinelandii in complex with phosphate

Experimental Data Snapshot

  • Resolution: 2.10 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.178 

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A Persulfurated Cysteine Promotes Active Site Reactivity in Azotobacter Vinelandii Rhodanse

Bordo, D.Forlani, F.Spallarossa, A.Colnaghi, R.Carpen, A.Bolognesi, M.Pagani, S.

(2001) Biol Chem 382: 1245

  • DOI: https://doi.org/10.1515/BC.2001.155
  • Primary Citation of Related Structures:  
    1H4K, 1H4M

  • PubMed Abstract: 

    Active site reactivity and specificity of RhdA, a thiosulfate:cyanide sulfurtransferase (rhodanese) from Azotobacter vinelandii, have been investigated through ligand binding, site-directed mutagenesis, and X-ray crystallographic techniques, in a combined approach. In native RhdA the active site Cys230 is found persulfurated; fluorescence and sulfurtransferase activity measurements show that phosphate anions interact with Cys230 persulfide sulfur atom and modulate activity. Crystallographic analyses confirm that phosphate and hypophosphite anions react with native RhdA, removing the persulfide sulfur atom from the active site pocket. Considering that RhdA and the catalytic subunit of Cdc25 phosphatases share a common three-dimensional fold as well as active site Cys (catalytic) and Arg residues, two RhdA mutants carrying a single amino acid insertion at the active site loop were designed and their phosphatase activity tested. The crystallographic and functional results reported here show that specific sulfurtransferase or phosphatase activities are strictly related to precise tailoring of the catalytic loop structure in RhdA and Cdc25 phosphatase, respectively.

  • Organizational Affiliation

    National Cancer Research Institute, Advanced Biotechnology Center, Genova, Italy.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
PUTATIVE THIOSULFATE SULFURTRANSFERASEA [auth X]271Azotobacter vinelandiiMutation(s): 0 
Gene Names: rhdA
Find proteins for P52197 (Azotobacter vinelandii)
Explore P52197 
Go to UniProtKB:  P52197
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP52197
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.10 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.178 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 40.41α = 90
b = 151.469β = 90
c = 53.609γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-05-16
    Type: Initial release
  • Version 1.1: 2014-02-05
    Changes: Data collection, Database references, Derived calculations, Non-polymer description, Other, Source and taxonomy, Structure summary, Version format compliance
  • Version 1.2: 2019-07-24
    Changes: Data collection