1WXG

E.coli NAD Synthetase, DND


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.199 

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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Structures of Escherichia coli NAD Synthetase with Substrates and Products Reveal Mechanistic Rearrangements

Jauch, R.Humm, A.Huber, R.Wahl, M.C.

(2005) J Biol Chem 280: 15131-15140

  • DOI: 10.1074/jbc.M413195200
  • Primary Citation of Related Structures:  
    1WXI, 1WXH, 1WXG, 1WXF, 1WXE

  • PubMed Abstract: 
  • Nicotinamide adenine dinucleotide synthetases (NADS) catalyze the amidation of nicotinic acid adenine dinucleotide (NAAD) to yield the enzyme cofactor nicotinamide adenine dinucleotide (NAD). Here we describe the crystal structures of the ammonia-dependent homodimeric NADS from Escherichia coli alone and in complex with natural substrates and with the reaction product NAD ...

    Nicotinamide adenine dinucleotide synthetases (NADS) catalyze the amidation of nicotinic acid adenine dinucleotide (NAAD) to yield the enzyme cofactor nicotinamide adenine dinucleotide (NAD). Here we describe the crystal structures of the ammonia-dependent homodimeric NADS from Escherichia coli alone and in complex with natural substrates and with the reaction product NAD. The structures disclosed two NAAD/NAD binding sites at the dimer interface and an adenosine triphosphate (ATP) binding site within each subunit. Comparison with the Bacillus subtilis NADS showed pronounced chemical differences in the NAAD/NAD binding sites and less prominent differences in the ATP binding pockets. In addition, the E. coli NADS structures revealed unexpected dynamical rearrangements in the NAAD/NAD binding pocket upon NAAD-to-NAD conversion, which define a catalysis state and a substrate/product exchange state. The two states are adopted by concerted movement of the nicotinysyl moieties of NAAD and NAD, Phe-170, and residues 224-228, which may be triggered by differential coordination of a magnesium ion to NAAD and NAD. Phylogenetic structure comparisons suggest that the present results are relevant for designing species-specific antibiotics.


    Organizational Affiliation

    Max-Planck-Institut für Biophysikalische Chemie, Abteilung Molekulare Entwicklungsbiologie, Am Fassberg 11, D-37077 Göttingen, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
NH(3)-dependent NAD(+) synthetaseA275Escherichia coliMutation(s): 0 
EC: 6.3.1.5
UniProt
Find proteins for P18843 (Escherichia coli (strain K12))
Explore P18843 
Go to UniProtKB:  P18843
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
DND (Subject of Investigation/LOI)
Query on DND

Download Ideal Coordinates CCD File 
C [auth A]NICOTINIC ACID ADENINE DINUCLEOTIDE
C21 H27 N6 O15 P2
SENPVEZBRZQVST-HISDBWNOSA-O
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
B [auth A]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.199 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 92.366α = 90
b = 67.792β = 104.4
c = 48.18γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
CNSrefinement

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-02-15
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance