6XXI

Crystal Structure of Human Deoxyhypusine Synthase in complex with NAD

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.68 Å
  • R-Value Free: 0.166 
  • R-Value Work: 0.154 
  • R-Value Observed: 0.154 

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Literature

Half Way to Hypusine-Structural Basis for Substrate Recognition by Human Deoxyhypusine Synthase.

Wator, E., Wilk, P., Grudnik, P.

(2020) Biomolecules 10

  • DOI: 10.3390/biom10040522
  • Primary Citation of Related Structures:  
    6XXH, 6XXI, 6XXJ, 6XXK, 6XXL, 6XXM

  • PubMed Abstract: 

    • Deoxyhypusine synthase (DHS) is a transferase enabling the formation of deoxyhypusine, which is the first, rate-limiting step of a unique post-translational modification: hypusination. DHS catalyses the transfer of a 4-aminobutyl moiety of polyamine spermidine to a specific lysine of eukaryotic translation factor 5A (eIF5A) precursor in a nicotinamide adenine dinucleotide (NAD)-dependent manner ...

    Deoxyhypusine synthase (DHS) is a transferase enabling the formation of deoxyhypusine, which is the first, rate-limiting step of a unique post-translational modification: hypusination. DHS catalyses the transfer of a 4-aminobutyl moiety of polyamine spermidine to a specific lysine of eukaryotic translation factor 5A (eIF5A) precursor in a nicotinamide adenine dinucleotide (NAD)-dependent manner. This modification occurs exclusively on one protein, eIF5A, and it is essential for cell proliferation. Malfunctions of the hypusination pathway, including those caused by mutations within the DHS encoding gene, are associated with conditions such as cancer or neurodegeneration. Here, we present a series of high-resolution crystal structures of human DHS. Structures were determined as the apoprotein, as well as ligand-bound states at high-resolutions ranging from 1.41 to 1.69 Å. By solving DHS in complex with its natural substrate spermidine (SPD), we identified the mode of substrate recognition. We also observed that other polyamines, namely spermine (SPM) and putrescine, bind DHS in a similar manner as SPD. Moreover, we performed activity assays showing that SPM could to some extent serve as an alternative DHS substrate. In contrast to previous studies, we demonstrate that no conformational changes occur in the DHS structure upon spermidine-binding. By combining mutagenesis and a light-scattering approach, we show that a conserved "ball-and-chain" motif is indispensable to assembling a functional DHS tetramer. Our study substantially advances our knowledge of the substrate recognition mechanism by DHS and may aid the design of pharmacological compounds for potential applications in cancer therapy.

    Organizational Affiliation: 

    Malopolska Centre of Biotechnology, Jagiellonian University, ul. Gronostajowa 7a, 30-387 Krakow, Poland.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Deoxyhypusine synthaseA, B369Homo sapiensMutation(s): 0 
Gene Names: DHPS, DS
EC: 2.5.1.46
UniProt & NIH Common Fund Data Resources
Find proteins for P49366 (Homo sapiens)
Explore P49366 
Go to UniProtKB:  P49366
PHAROS:  P49366
GTEx:  ENSG00000095059
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 6 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAD (Subject of Investigation/LOI)
Query on NAD
Download Ideal Coordinates CCD File 
G [auth A], HA [auth B]NICOTINAMIDE-ADENINE-DINUCLEOTIDE
C21 H27 N7 O14 P2
BAWFJGJZGIEFAR-NNYOXOHSSA-N		 Ligand Interaction
MRD
Query on MRD
Download Ideal Coordinates CCD File 
GA [auth B](4R)-2-METHYLPENTANE-2,4-DIOL
C6 H14 O2
SVTBMSDMJJWYQN-RXMQYKEDSA-N		 Ligand Interaction
BME
Query on BME
Download Ideal Coordinates CCD File 
H [auth A], I [auth A], IA [auth B], J [auth A]BETA-MERCAPTOETHANOL
C2 H6 O S
DGVVWUTYPXICAM-UHFFFAOYSA-N		 Ligand Interaction
EDO
Query on EDO
Download Ideal Coordinates CCD File 
BA [auth B] , D [auth A] , EA [auth B] , FA [auth B] , MA [auth B] , NA [auth B] , O [auth A] , OA [auth B] , 
BA [auth B], D [auth A], EA [auth B], FA [auth B], MA [auth B], NA [auth B], O [auth A], OA [auth B], P [auth A], PA [auth B], Q [auth A], R [auth A], S [auth A], T [auth A], U [auth A], V [auth A], W [auth A], Y [auth B]
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N		 Ligand Interaction
ACT
Query on ACT
Download Ideal Coordinates CCD File 
AA [auth B] , C [auth A] , CA [auth B] , DA [auth B] , E [auth A] , F [auth A] , JA [auth B] , K [auth A] , 
AA [auth B], C [auth A], CA [auth B], DA [auth B], E [auth A], F [auth A], JA [auth B], K [auth A], KA [auth B], L [auth A], LA [auth B], M [auth A], N [auth A], Z [auth B]
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M		 Ligand Interaction
FMT
Query on FMT
Download Ideal Coordinates CCD File 
X [auth A]FORMIC ACID
C H2 O2
BDAGIHXWWSANSR-UHFFFAOYSA-N		 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CSS
Query on CSS		A, BL-PEPTIDE LINKINGC3 H7 N O2 S2CYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.68 Å
  • R-Value Free: 0.166 
  • R-Value Work: 0.154 
  • R-Value Observed: 0.154 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 104.819α = 90
b = 104.819β = 90
c = 160.499γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
XSCALEdata scaling
PDB_EXTRACTdata extraction
XDSdata reduction
PHENIXphasing

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Polish National Science CentrePolandUMO-2019/33/B/NZ1/01839

Revision History  (Full details and data files)

  • Version 1.0: 2020-04-15
    Type: Initial release