1NUQ

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


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 

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history


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

  • 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 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.


    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

    Organizational Affiliation

    Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA. zhang@chop.swmed.edu



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
FKSG76 AB252Homo sapiensMutation(s): 0 
Gene Names: FKSG76NMNAT3
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
Protein Feature View
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  • Reference Sequence
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 = 79.309α = 90
b = 79.309β = 90
c = 147.508γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • 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