2BJD

Sulfolobus Solfataricus Acylphosphatase. Triclinic space group


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.27 Å
  • R-Value Free: 0.171 
  • R-Value Work: 0.138 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure, Conformational Stability, and Enzymatic Properties of Acylphosphatase from the Hyperthermophile Sulfolobus Solfataricus.

Corazza, A.Rosano, C.Pagano, K.Alverdi, V.Esposito, G.Capanni, C.Bemporad, F.Plakoutsi, G.Stefani, M.Chiti, F.Zuccotti, S.Bolognesi, M.Viglino, P.

(2006) Proteins: Struct., Funct., Bioinf. 62: 64

  • DOI: 10.1002/prot.20703
  • Primary Citation of Related Structures:  
  • Also Cited By: 2GV1

  • PubMed Abstract: 
  • The structure of AcP from the hyperthermophilic archaeon Sulfolobus solfataricus has been determined by (1)H-NMR spectroscopy and X-ray crystallography. Solution and crystal structures (1.27 A resolution, R-factor 13.7%) were obtained on the full-len ...

    The structure of AcP from the hyperthermophilic archaeon Sulfolobus solfataricus has been determined by (1)H-NMR spectroscopy and X-ray crystallography. Solution and crystal structures (1.27 A resolution, R-factor 13.7%) were obtained on the full-length protein and on an N-truncated form lacking the first 12 residues, respectively. The overall Sso AcP fold, starting at residue 13, displays the same betaalphabetabetaalphabeta topology previously described for other members of the AcP family from mesophilic sources. The unstructured N-terminal tail may be crucial for the unusual aggregation mechanism of Sso AcP previously reported. Sso AcP catalytic activity is reduced at room temperature but rises at its working temperature to values comparable to those displayed by its mesophilic counterparts at 25-37 degrees C. Such a reduced activity can result from protein rigidity and from the active site stiffening due the presence of a salt bridge between the C-terminal carboxylate and the active site arginine. Sso AcP is characterized by a melting temperature, Tm, of 100.8 degrees C and an unfolding free energy, DeltaG(U-F)H2O, at 28 degrees C and 81 degrees C of 48.7 and 20.6 kJ mol(-1), respectively. The kinetic and structural data indicate that mesophilic and hyperthermophilic AcP's display similar enzymatic activities and conformational stabilities at their working conditions. Structural analysis of the factor responsible for Sso AcP thermostability with respect to mesophilic AcP's revealed the importance of a ion pair network stabilizing particularly the beta-sheet and the loop connecting the fourth and fifth strands, together with increased density packing, loop shortening and a higher alpha-helical propensity.


    Related Citations: 
    • Preliminary Characterization of Two Different Crystal Forms of Acylphosphatase from the Hyperthermophile Archaeon Sulfolobus Solfataricus
      Zuccotti, S.,Rosano, C.,Bemporad, F.,Stefani, M.,Bolognesi, M.
      (2005) Acta Crystallogr.,Sect.F 61: 144


    Organizational Affiliation

    Dipartimento di Scienze e Tecnologie Biomediche, Università di Udine, Udine, Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ACYLPHOSPHATASE
A, B
101Saccharolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2)Mutation(s): 0 
Gene Names: acyP
EC: 3.6.1.7
Find proteins for Q97ZL0 (Saccharolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2))
Go to UniProtKB:  Q97ZL0
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
CL
Query on CL

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Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
CD
Query on CD

Download SDF File 
Download CCD File 
A, B
CADMIUM ION
Cd
WLZRMCYVCSSEQC-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.27 Å
  • R-Value Free: 0.171 
  • R-Value Work: 0.138 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 26.188α = 81.97
b = 36.775β = 77.37
c = 45.984γ = 72.37
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
REFMACrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-11-23
    Type: Initial release
  • Version 1.1: 2011-05-10
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance