Biological Assembly 1  

 3D View: Structure

Global Symmetry: Dihedral - D3  (3D View)
Global Stoichiometry: Homo 6-mer - A6 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 32.02 kDa 
• Atom Count: 1806 
• Residue Count: 216 
• Unique protein chains: 1

1KKU

Crystal structure of nuclear human nicotinamide mononucleotide adenylyltransferase

• DOI: 10.2210/pdb1KKU/pdb

• Classification: TRANSFERASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2001-12-10 Released: 2002-06-10 
• Deposition Author(s): Garavaglia, S., D'Angelo, I., Emanuelli, M., Carnevali, F., Pierella, F., Magni, G., Rizzi, M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free: 0.284 
• R-Value Work: 0.236 
• R-Value Observed: 0.247 

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

• PubMed: 11751893 
• DOI: 10.1074/jbc.M111589200
• Primary Citation of Related Structures:  
  1KKU


• 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 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.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
NICOTINAMIDE MONONUCLEOTIDE ADENYLYLTRANSFERASE	A	279	Homo sapiens	Mutation(s): 0  Gene Names: NMNAT1, NMNAT EC: 2.7.7.1 (PDB Primary Data), 2.7.7.18 (UniProt)
Find proteins for Q9HAN9 (Homo sapiens) Explore Q9HAN9  Go to UniProtKB:  Q9HAN9
NIH Common Fund Data Resources
PHAROS:  Q9HAN9 GTEx:  ENSG00000173614

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free: 0.284 
• R-Value Work: 0.236 
• R-Value Observed: 0.247 
• Space Group: P 6₃ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 147.459	α = 90
b = 147.459	β = 90
c = 61.71	γ = 120

Software Package:

Software Name	Purpose
SHELXS	phasing
REFMAC	refinement
MOSFLM	data reduction
CCP4	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2001-12-10 
• Released Date: 2002-06-10 
Deposition Author(s): Garavaglia, S., D'Angelo, I., Emanuelli, M., Carnevali, F., Pierella, F., Magni, G., Rizzi, M.

Revision History 

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