8TFA

Diphosphoinositol polyphosphate phosphohydrolase 1 (DIPP1/NUDT3) in complex with myo-5-PP-IP4, produced upon myo-(2OH)-IP5 phosphorylation by TvIPK

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

  • Deposited: 2023-07-09 Released: 2023-11-15 
  • Deposition Author(s): Zong, G., Wang, H., Shears, S.B.
  • Funding Organization(s): National Institutes of Health/National Institute of Environmental Health Sciences (NIH/NIEHS)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.40 Å
  • R-Value Free: 0.169 
  • R-Value Work: 0.154 
  • R-Value Observed: 0.155 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Biochemical and structural characterization of an inositol pyrophosphate kinase from a giant virus.

Zong, G.Desfougeres, Y.Portela-Torres, P.Kwon, Y.U.Saiardi, A.Shears, S.B.Wang, H.

(2024) EMBO J 43: 462-480

  • DOI: https://doi.org/10.1038/s44318-023-00005-0
  • Primary Citation of Related Structures:  
    8T8U, 8T8V, 8T8W, 8T8X, 8T8Y, 8T8Z, 8T90, 8T91, 8T92, 8T93, 8T95, 8T96, 8T97, 8T98, 8T99, 8TF9, 8TFA

  • PubMed Abstract: 

    Kinases that synthesize inositol phosphates (IPs) and pyrophosphates (PP-IPs) control numerous biological processes in eukaryotic cells. Herein, we extend this cellular signaling repertoire to viruses. We have biochemically and structurally characterized a minimalist inositol phosphate kinase (i.e., TvIPK) encoded by Terrestrivirus, a nucleocytoplasmic large ("giant") DNA virus (NCLDV). We show that TvIPK can synthesize inositol pyrophosphates from a range of scyllo- and myo-IPs, both in vitro and when expressed in yeast cells. We present multiple crystal structures of enzyme/substrate/nucleotide complexes with individual resolutions from 1.95 to 2.6 Å. We find a heart-shaped ligand binding pocket comprising an array of positively charged and flexible side chains, underlying the observed substrate diversity. A crucial arginine residue in a conserved "G-loop" orients the γ-phosphate of ATP to allow substrate pyrophosphorylation. We highlight additional conserved catalytic and architectural features in TvIPK, and support their importance through site-directed mutagenesis. We propose that NCLDV inositol phosphate kinases may have assisted evolution of inositol pyrophosphate signaling, and we discuss the potential biogeochemical significance of TvIPK in soil niches.


  • Organizational Affiliation

    Inositol Signaling Group, Signal Transduction Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC, 27709, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Diphosphoinositol polyphosphate phosphohydrolase 1148Homo sapiensMutation(s): 0 
Gene Names: NUDT3DIPPDIPP1
EC: 3.6.1.52 (PDB Primary Data), 3.6.1 (PDB Primary Data), 3.6.1.62 (UniProt), 3.6.1.61 (UniProt), 3.6.1.59 (UniProt), 3.6.1.10 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for O95989 (Homo sapiens)
Explore O95989 
Go to UniProtKB:  O95989
PHAROS:  O95989
GTEx:  ENSG00000272325 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO95989
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
U6J (Subject of Investigation/LOI)
Query on U6J

Download Ideal Coordinates CCD File 
B [auth A](1r,2R,3S,4r,5R,6S)-4-hydroxy-2,3,5,6-tetrakis(phosphonooxy)cyclohexyl trihydrogen diphosphate
C6 H18 O24 P6
FFZGWHDHUIRNPY-KXXVROSKSA-N
CL (Subject of Investigation/LOI)
Query on CL

Download Ideal Coordinates CCD File 
F [auth A]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
MG (Subject of Investigation/LOI)
Query on MG

Download Ideal Coordinates CCD File 
C [auth A],
D [auth A],
E [auth A]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
F (Subject of Investigation/LOI)
Query on F

Download Ideal Coordinates CCD File 
G [auth A]FLUORIDE ION
F
KRHYYFGTRYWZRS-UHFFFAOYSA-M
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.40 Å
  • R-Value Free: 0.169 
  • R-Value Work: 0.154 
  • R-Value Observed: 0.155 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 45.304α = 90
b = 59.64β = 90
c = 62.698γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
SCALEPACKdata scaling
DENZOdata reduction
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Environmental Health Sciences (NIH/NIEHS)United States1ZIAES080046-31

Revision History  (Full details and data files)

  • Version 1.0: 2023-11-15
    Type: Initial release
  • Version 1.1: 2024-01-24
    Changes: Database references
  • Version 1.2: 2024-02-14
    Changes: Database references