1KKU

Crystal structure of nuclear human nicotinamide mononucleotide adenylyltransferase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.236 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of human NMN adenylyltransferase. A key nuclear enzyme for NAD homeostasis.

Garavaglia, S.D'Angelo, I.Emanuelli, M.Carnevali, F.Pierella, F.Magni, G.Rizzi, M.

(2002) J.Biol.Chem. 277: 8524-8530

  • DOI: 10.1074/jbc.M111589200

  • PubMed Abstract: 
  • Nicotinamide mononucleotide adenylyltransferase (NMNAT), a member of the nucleotidyltransferase alpha/beta-phosphodiesterases superfamily, catalyzes a universal step (NMN + ATP = NAD + PP(i)) in NAD biosynthesis. Localized within the nucleus, the act ...

    Nicotinamide mononucleotide adenylyltransferase (NMNAT), a member of the nucleotidyltransferase alpha/beta-phosphodiesterases superfamily, catalyzes a universal step (NMN + ATP = NAD + PP(i)) in NAD biosynthesis. Localized within the nucleus, the activity of the human enzyme is greatly altered in tumor cells, rendering it a promising target for cancer chemotherapy. By using a combination of single isomorphous replacement and density modification techniques, the human NMNAT structure was solved by x-ray crystallography to a 2.5-A resolution, revealing a hexamer that is composed of alpha/beta-topology subunits. The active site topology of the enzyme, analyzed through homology modeling and structural comparison with other NMNATs, yielded convincing evidence for a substrate-induced conformational change. We also observed remarkable structural conservation in the ATP-recognition motifs GXXXPX(T/H)XXH and SXTXXR, which we take to be the universal signature for NMNATs. Structural comparison of human and prokaryotic NMNATs may also lead to the rational design of highly selective antimicrobial drugs.


    Organizational Affiliation

    Department of Genetics and Microbiology A. Buzzati Traverso, University of Pavia, Via Ferrata 1, 27100 Pavia, Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
NICOTINAMIDE MONONUCLEOTIDE ADENYLYLTRANSFERASE
A
279Homo sapiensMutation(s): 0 
Gene Names: NMNAT1 (NMNAT)
EC: 2.7.7.1, 2.7.7.18
Find proteins for Q9HAN9 (Homo sapiens)
Go to Gene View: NMNAT1
Go to UniProtKB:  Q9HAN9
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.236 
  • Space Group: P 63 2 2
Unit Cell:
Length (Å)Angle (°)
a = 147.459α = 90.00
b = 147.459β = 90.00
c = 61.710γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SHELXSphasing
CCP4data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-06-10
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance