Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Dihedral - D2  (3D View)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 1 assigned by authors and generated by PISA,PQS (software)

Macromolecule Content

• Total Structure Weight: 58.51 kDa 
• Atom Count: 3789 
• Residue Count: 425 
• Unique protein chains: 1

1NUQ

CRYSTAL STRUCTURE OF HUMAN CYTOSOLIC NMN/NaMN ADENYLYLTRANSFERASE COMPLEXED WITH NaAD

• DOI: 10.2210/pdb1NUQ/pdb

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


• Deposited: 2003-02-01 Released: 2003-06-03 
• Deposition Author(s): Zhang, X., Kurnasov, O.V., Karthikeyan, S., Grishin, N.V., Osterman, A.L., Zhang, H.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.248 
• R-Value Work: 0.204 
• R-Value Observed: 0.204 

Literature

STRUCTURAL CHARACTERIZATION OF A HUMAN CYTOSOLIC NMN/NaMN ADENYLYLTRANSFERASE AND IMPLICATION IN HUMAN NAD BIOSYNTHESIS

ZHANG, X., KURNASOV, O.V., KARTHIKEYAN, S., GRISHIN, N.V., OSTERMAN, A.L., ZHANG, H.

(2003) J Biol Chem 278: 13503-13511

• PubMed: 12574164 
• DOI: 10.1074/jbc.M300073200
• Primary Citation of Related Structures:  
  1NUU, 1NUT, 1NUS, 1NUR, 1NUQ, 1NUP


• PubMed Abstract: 
  

Pyridine dinucleotides (NAD and NADP) are ubiquitous cofactors involved in hundreds of redox reactions essential for the energy transduction and metabolism in all living cells. In addition, NAD also serves as a substrate for ADP-ribosylation of a number of nuclear proteins, for silent information regulator 2 (Sir2)-like histone deacetylase that is involved in gene silencing regulation, and for cyclic ADP ribose (cADPR)-dependent Ca(2+) signaling. Pyridine nucleotide adenylyltransferase (PNAT) is an indispensable central enzyme in the NAD biosynthesis pathways catalyzing the condensation of pyridine mononucleotide (NMN or NaMN) with the AMP moiety of ATP to form NAD (or NaAD). Here we report the identification and structural characterization of a novel human PNAT (hsPNAT-3) that is located in the cytoplasm and mitochondria. Its subcellular localization and tissue distribution are distinct from the previously identified human nuclear PNAT-1 and PNAT-2. Detailed structural analysis of PNAT-3 in its apo form and in complex with its substrate(s) or product revealed the catalytic mechanism of the enzyme. The characterization of the cytosolic human PNAT-3 provided compelling evidence that the final steps of NAD biosynthesis pathways may exist in mammalian cytoplasm and mitochondria, potentially contributing to their NAD/NADP pool.

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Related Citations: 

• STRUCTURE OF HUMAN NICOTINAMIDE/NICOTONIC ACID MONONUCLEOTIDE ADENYLYLTRANSFERASE BASIS FOR THE DUAL SUBSTRATE SPECIFICITY AND ACTIVATION OF THE ONCOLYTIC AGENT TIAZOFURIN
  ZHOU, T., KURNASOV, O., TOMCHICK, D.R., BINNS, D.D., GRISHIN, N.V., MARQUEZ, V.E., OSTERMAN, A.L., ZHANG, H.
  (2002) J Biol Chem 277: 13148

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Organizational Affiliation: 

Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA. [e-mail]

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
FKSG76	A, B	252	Homo sapiens	Mutation(s): 0  Gene Names: FKSG76, NMNAT3 EC: 2.7.7.18 (UniProt), 2.7.7.1 (UniProt)
Find proteins for Q96T66 (Homo sapiens) Explore Q96T66  Go to UniProtKB:  Q96T66
NIH Common Fund Data Resources
PHAROS:  Q96T66 GTEx:  ENSG00000163864

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
DND	A, B	NICOTINIC ACID ADENINE DINUCLEOTIDE C21 H27 N6 O15 P2 SENPVEZBRZQVST-HISDBWNOSA-O
SO4	A, B	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.248 
• R-Value Work: 0.204 
• R-Value Observed: 0.204 
• Space Group: P 4₃ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 79.309	α = 90
b = 79.309	β = 90
c = 147.508	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2003-02-01 
• Released Date: 2003-06-03 
Deposition Author(s): Zhang, X., Kurnasov, O.V., Karthikeyan, S., Grishin, N.V., Osterman, A.L., Zhang, H.

Revision History 

• Version 1.0: 2003-06-03
  Type: Initial release
  
• Version 1.1: 2008-04-29
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Derived calculations, Version format compliance
• Version 1.3: 2011-11-16
  Changes: Atomic model, Non-polymer description
• Version 2.0: 2019-10-23
  Changes: Advisory, Atomic model, Data collection, Derived calculations, Non-polymer description, Structure summary