3R2J

Crystal Structure of PnC1 from L. infantum in complex with nicotinate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.68 Å
  • R-Value Free: 0.298 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.218 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

The Leishmania nicotinamidase is essential for NAD(+) production and parasite proliferation.

Gazanion, E.Garcia, D.Silvestre, R.Gerard, C.Guichou, J.F.Labesse, G.Seveno, M.Cordeiro-Da-Silva, A.Ouaissi, A.Sereno, D.Vergnes, B.

(2011) Mol Microbiol 82: 21-38

  • DOI: 10.1111/j.1365-2958.2011.07799.x
  • Primary Citation of Related Structures:  
    3R2J

  • PubMed Abstract: 
  • NAD+ is a central cofactor that plays important roles in cellular metabolism and energy production in all living cells. Genomics-based reconstruction of NAD+ metabolism revealed that Leishmania protozoan parasites are NAD+ auxotrophs. Consequently, these parasites require assimilating NAD+ precursors (nicotinamide, nicotinic acid, nicotinamide riboside) from their host environment to synthesize NAD+ by a salvage pathway ...

    NAD+ is a central cofactor that plays important roles in cellular metabolism and energy production in all living cells. Genomics-based reconstruction of NAD+ metabolism revealed that Leishmania protozoan parasites are NAD+ auxotrophs. Consequently, these parasites require assimilating NAD+ precursors (nicotinamide, nicotinic acid, nicotinamide riboside) from their host environment to synthesize NAD+ by a salvage pathway. Nicotinamidase is a key enzyme of this salvage pathway that catalyses conversion of nicotinamide (NAm) to nicotinic acid (Na), and that is absent in higher eukaryotes. We present here the biochemical and functional characterizations of the Leishmania infantum nicotinamidase (LiPNC1). Generation of Lipnc1 null mutants leads to a decrease in NAD+ content, associated with a metabolic shutdown-like phenotype with an extensive lag phase of growth. Both phenotypes could be rescued by an add-back construct or by addition of exogenous Na. In addition, Lipnc1 null mutants were unable to establish a sustained infection in a murine experimental model. Altogether, these results illustrate that NAD+ homeostasis is a fundamental component of Leishmania biology and virulence, and that NAm constitutes its main NAD+ source in the mammalian host. The crystal structure of LiPNC1 we solved allows now the design of rational inhibitors against this new promising therapeutic target.


    Organizational Affiliation

    MIVEGEC (UM1-CNRS 5290-IRD 224), Institut de Recherche pour le Développement (IRD), BP 64501, 34394 Montpellier Cedex 5, France.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Alpha/beta-hydrolase-like protein ABCD227Leishmania infantumMutation(s): 0 
Gene Names: LinJ01.0460LINF_010009600LINJ_01_0470
EC: 3.5.1.19
Find proteins for A4HRG8 (Leishmania infantum)
Explore A4HRG8 
Go to UniProtKB:  A4HRG8
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.68 Å
  • R-Value Free: 0.298 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.218 
  • Space Group: P 4 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 123.386α = 90
b = 123.386β = 90
c = 114.993γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
MOLREPphasing
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-08-24
    Type: Initial release
  • Version 1.1: 2011-10-12
    Changes: Database references