5T3O

Crystal structure of the Phosphorybosylpyrophosphate synthetase II from Thermus thermophilus


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.229 

Starting Model: experimental
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This is version 1.2 of the entry. See complete history


Literature

Crystal structure of recombinant phosphoribosylpyrophosphate synthetase 2 from Thermus thermophilus HB27 complexed with ADP and sulfate ions.

Timofeev, V.I.Sinitsyna, E.V.Kostromina, M.A.Muravieva, T.I.Makarov, D.A.Mikheeva, O.O.Kuranova, I.P.Esipov, R.S.

(2017) Acta Crystallogr F Struct Biol Commun 73: 369-375

  • DOI: https://doi.org/10.1107/S2053230X17007488

  • PubMed Abstract: 

    Phosphoribosylpyrophosphate synthetase (PRPPS) from the thermophilic bacterial strain Thermus thermophilus HB27 catalyzes the synthesis of phosphoribosylpyrophosphate from ribose 5-phosphate and ATP, and belongs to the class I PRPPSs. The three-dimensional structure of the recombinant enzyme was solved at 2.2 Å resolution using crystals grown in microgravity from protein solution containing ATP, magnesium and sulfate ions. An ADP molecule was located in the active site of each subunit of the hexameric enzyme molecule and sulfate ions were located in both the active and allosteric sites. It was found that the catalytic loop that restricts the active-site area and is usually missing from the electron-density map of class I PRPPSs adopts different conformations in three independent subunits in T. thermophilus PRPPS. A closed conformation of the active site was found in one of subunits where the highly ordered catalytic β-hairpin delivers the Lys and Arg residues that are essential for activity directly to the ADP molecule, which occupies the ATP-binding site. A comparison of the conformations of the catalytic loop in the three independent subunits reveals a possible mode of transition from the open to the closed state of the active site during the course of the catalyzed reaction.


  • Organizational Affiliation

    Shubnikov Institute of Crystallography, Federal Scientific Research Centre `Crystallography and Photonics' of Russian Academy of Sciences, Leninsky Prospekt 59, Moscow 119333, Russian Federation.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Ribose-phosphate pyrophosphokinase
A, B, C
307Thermus thermophilusMutation(s): 0 
Gene Names: prsTTHA1637
EC: 2.7.6.1
UniProt
Find proteins for Q5SHU3 (Thermus thermophilus (strain ATCC 27634 / DSM 579 / HB8))
Explore Q5SHU3 
Go to UniProtKB:  Q5SHU3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ5SHU3
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
ADP
Query on ADP

Download Ideal Coordinates CCD File 
D [auth A],
G [auth B],
J [auth C]
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
SO4
Query on SO4

Download Ideal Coordinates CCD File 
E [auth A]
F [auth A]
H [auth B]
I [auth B]
K [auth C]
E [auth A],
F [auth A],
H [auth B],
I [auth B],
K [auth C],
L [auth C]
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.229 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 115.97α = 90
b = 115.97β = 90
c = 207.99γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
iMOSFLMdata reduction
SCALAdata scaling
BALBESphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-06-14
    Type: Initial release
  • Version 1.1: 2017-06-21
    Changes: Database references
  • Version 1.2: 2024-01-17
    Changes: Data collection, Database references, Refinement description