1K4K

Crystal structure of E. coli Nicotinic acid mononucleotide adenylyltransferase

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.210 

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This is version 1.3 of the entry. See complete history. 


Literature

Crystal structures of E. coli nicotinate mononucleotide adenylyltransferase and its complex with deamido-NAD.

Zhang, H., Zhou, T., Kurnasov, O., Cheek, S., Grishin, N.V., Osterman, A.

(2002) Structure 10: 69-79

  • DOI: 10.1016/s0969-2126(01)00693-1
  • Primary Citation of Related Structures:  
    1K4M, 1K4K

  • PubMed Abstract: 

    • Nicotinamide/Nicotinate mononucleotide (NMN/NaMN) adenylyltransferase is an indispensable enzyme in both de novo biosynthesis and salvage of NAD+ and NADP+. In prokaryotes, it is absolutely required for cell survival, thus representing an attractive ...

    Nicotinamide/Nicotinate mononucleotide (NMN/NaMN) adenylyltransferase is an indispensable enzyme in both de novo biosynthesis and salvage of NAD+ and NADP+. In prokaryotes, it is absolutely required for cell survival, thus representing an attractive target for the development of new broad-spectrum antibacteria inhibitors. The crystal structures of E. coli NaMN adenylyltransferase (NMNAT) and its complex with deamido-NAD (NaAD) revealed that ligand binding causes large conformational changes in several loop regions around the active site. The enzyme specifically recognizes the deamidated pyridine nucleotide through interactions between nicotinate carboxylate with several protein main chain amides and a positive helix dipole. Comparison of E. coli NMNAT with those from archaeal organisms revealed extensive differences in the active site architecture, enzyme-ligand interaction mode, and bound dinucleotide conformations. The bacterial NaMN adenylyltransferase structures described here provide a foundation for structure-based design of specific inhibitors that may have therapeutic potential.

    Organizational Affiliation: 

    Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA. zhang@chop.swmed.edu



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Nicotinic acid mononucleotide adenylyltransferaseA, B, C, D213Escherichia coliMutation(s): 0 
Gene Names: nadD
EC: 2.7.7.18
Find proteins for P0A752 (Escherichia coli (strain K12))
Explore P0A752 
Go to UniProtKB:  P0A752
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.210 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.435α = 72.68
b = 66.528β = 88.77
c = 72.855γ = 69.55
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
CNSrefinement
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-10-08
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-01-31
    Changes: Experimental preparation