Crystal structure of phosphoribosylpyrophosphate synthetase from Mycobacterium smegmatis

Experimental Data Snapshot

  • Resolution: 2.40 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.200 

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Biochemical and structural investigations on phosphoribosylpyrophosphate synthetase from Mycobacterium smegmatis.

Donini, S.Garavaglia, S.Ferraris, D.M.Miggiano, R.Mori, S.Shibayama, K.Rizzi, M.

(2017) PLoS One 12: e0175815-e0175815

  • DOI: https://doi.org/10.1371/journal.pone.0175815
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Mycobacterium smegmatis represents one model for studying the biology of its pathogenic relative Mycobacterium tuberculosis. The structural characterization of a M. tuberculosis ortholog protein can serve as a valid tool for the development of molecules active against the M. tuberculosis target. In this context, we report the biochemical and structural characterization of M. smegmatis phosphoribosylpyrophosphate synthetase (PrsA), the ortholog of M. tuberculosis PrsA, the unique enzyme responsible for the synthesis of phosphoribosylpyrophosphate (PRPP). PRPP is a key metabolite involved in several biosynthetic pathways including those for histidine, tryptophan, nucleotides and decaprenylphosphoryl-arabinose, an essential precursor for the mycobacterial cell wall biosynthesis. Since M. tuberculosis PrsA has been validated as a drug target for the development of antitubercular agents, the data presented here will add to the knowledge of the mycobacterial enzyme and could contribute to the development of M. tuberculosis PrsA inhibitors of potential pharmacological interest.

  • Organizational Affiliation

    Department of Pharmaceutical Sciences, Università del Piemonte Orientale "A. Avogadro", Largo Donegani 2, Novara, Italy.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Ribose-phosphate pyrophosphokinaseA,
B [auth C],
C [auth B]
326Mycolicibacterium smegmatis MC2 155Mutation(s): 0 
Gene Names: prsMSMEG_5427MSMEI_5278
Find proteins for A0R3C8 (Mycolicibacterium smegmatis (strain ATCC 700084 / mc(2)155))
Explore A0R3C8 
Go to UniProtKB:  A0R3C8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0R3C8
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.40 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.200 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 85.292α = 90
b = 85.292β = 90
c = 249.791γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
SCALAdata scaling

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
EU 7th Framework ProgramItaly260872

Revision History  (Full details and data files)

  • Version 1.0: 2017-04-26
    Type: Initial release
  • Version 1.1: 2019-02-20
    Changes: Advisory, Data collection, Derived calculations
  • Version 1.2: 2022-07-13
    Changes: Database references, Structure summary
  • Version 1.3: 2024-01-17
    Changes: Data collection, Refinement description