4MNN

The crystal structure of Sso1120 from Sulfolobus solfataricus


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.193 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Sulfolobus solfataricus thiol redox puzzle: characterization of an atypical protein disulfide oxidoreductase.

Limauro, D.De Simone, G.Pirone, L.Bartolucci, S.D'Ambrosio, K.Pedone, E.

(2014) Extremophiles 18: 219-228

  • DOI: 10.1007/s00792-013-0607-8

  • PubMed Abstract: 
  • Protein disulfide oxidoreductases (PDOs) are proteins involved in disulfide bond formation playing a crucial role in adaptation to extreme environment. This paper reports the functional and structural characterization of Sso1120, a PDO from the hyper ...

    Protein disulfide oxidoreductases (PDOs) are proteins involved in disulfide bond formation playing a crucial role in adaptation to extreme environment. This paper reports the functional and structural characterization of Sso1120, a PDO from the hyperthermophilic archaeon Sulfolobus solfataricus. The protein was expressed in Escherichia coli and purified to homogeneity. The functional characterization showed that the enzyme has reductase activity, as tested by insulin assay, but differently from the other PDOs, it does not present isomerase activity. In addition it is able to form a redox couple with the thioredoxin reductase that could be used in undiscovered pathways. The protein revealed a melting point of around 90 °C in CD spectroscopy-monitored thermal denaturation and high denaturant resistance. The X-ray crystallographic structure was solved at 1.80 Å resolution, showing differences with respect to other PDOs and an unexpected similarity with the N-terminal domain of the alkyl hydroperoxide reductase F component from Salmonella typhimurium. On the basis of the reported data and of bioinformatics and phylogenetic analyses, a possible involvement of this atypical PDO in a new antioxidant system of S. solfataricus has been proposed.


    Organizational Affiliation

    Dipartimento di Biologia, Università degli Studi di Napoli ''Federico II'', Complesso Universitario Monte S. Angelo, Via Cinthia, 80126, Naples, Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Glutaredoxin related protein
A
179Saccharolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2)Mutation(s): 0 
Find proteins for Q97Z21 (Saccharolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2))
Go to UniProtKB:  Q97Z21
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download SDF File 
Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.193 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 68.909α = 90.00
b = 79.725β = 90.00
c = 67.650γ = 90.00
Software Package:
Software NamePurpose
CNSphasing
CNSrefinement
HKL-2000data scaling
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-01-01
    Type: Initial release
  • Version 1.1: 2014-03-19
    Type: Database references