Crystal structure of ligand-free phosphoribohydroxylase lonely guy from Claviceps purpurea in complex with phosphoribose

Experimental Data Snapshot

  • Resolution: 2.50 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.216 

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The Three-Dimensional Structure of "Lonely Guy" from Claviceps Purpurea Provides Insights Into the Phosphoribohydrolase Function of Rossmann Fold-Containing Lysine Decarboxylase-Like Proteins.

Dzurova, L.Forneris, F.Savino, S.Galuszka, P.Vrabka, J.Frebort, I.

(2015) Proteins 83: 1539

  • DOI: https://doi.org/10.1002/prot.24835
  • Primary Citation of Related Structures:  
    5AJT, 5AJU

  • PubMed Abstract: 

    The recently discovered cytokinin (CK)-specific phosphoribohydrolase "Lonely Guy" (LOG) is a key enzyme of CK biosynthesis, converting inactive CK nucleotides into biologically active free bases. We have determined the crystal structures of LOG from Claviceps purpurea (cpLOG) and its complex with the enzymatic product phosphoribose. The structures reveal a dimeric arrangement of Rossmann folds, with the ligands bound to large pockets at the interface between cpLOG monomers. Structural comparisons highlight the homology of cpLOG to putative lysine decarboxylases. Extended sequence analysis enabled identification of a distinguishing LOG sequence signature. Taken together, our data suggest phosphoribohydrolase activity for several proteins of unknown function.

  • Organizational Affiliation

    The Armenise-Harvard Laboratory of Structural Biology, Department of Biology and Biotechnology, University of Pavia, Pavia, 27100, Italy.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
PHOSPHORIBOHYDROLASE LONELY GUY274Claviceps purpureaMutation(s): 0 
Find proteins for M1VUY5 (Claviceps purpurea (strain 20.1))
Explore M1VUY5 
Go to UniProtKB:  M1VUY5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupM1VUY5
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on RP5

Download Ideal Coordinates CCD File 
B [auth A]5-O-phosphono-beta-D-ribofuranose
C5 H11 O8 P
Query on SO4

Download Ideal Coordinates CCD File 
O4 S
Experimental Data & Validation

Experimental Data

  • Resolution: 2.50 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.216 
  • Space Group: I 41 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 78.97α = 90
b = 78.97β = 90
c = 144.64γ = 90
Software Package:
Software NamePurpose
iMOSFLMdata reduction
Aimlessdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-06-03
    Type: Initial release
  • Version 1.1: 2015-08-05
    Changes: Database references
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Other
  • Version 2.1: 2024-01-10
    Changes: Data collection, Database references, Refinement description, Structure summary