6Q94

Crystal structure of human GDP-D-mannose 4,6-dehydratase (S156D) in complex with GDP-Man


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.189 

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Ligand Structure Quality Assessment 


This is version 1.1 of the entry. See complete history


Literature

A Parsimonious Mechanism of Sugar Dehydration by Human GDP-Mannose-4,6-dehydratase.

Pfeiffer, M.Johansson, C.Krojer, T.Kavanagh, K.L.Oppermann, U.Nidetzky, B.

(2019) ACS Catal 9: 2962-2968

  • DOI: https://doi.org/10.1021/acscatal.9b00064
  • Primary Citation of Related Structures:  
    6GPJ, 6GPK, 6GPL, 6Q94

  • PubMed Abstract: 

    Biosynthesis of 6-deoxy sugars, including l-fucose, involves a mechanistically complex, enzymatic 4,6-dehydration of hexose nucleotide precursors as the first committed step. Here, we determined pre- and postcatalytic complex structures of the human GDP-mannose 4,6-dehydratase at atomic resolution. These structures together with results of molecular dynamics simulation and biochemical characterization of wildtype and mutant enzymes reveal elusive mechanistic details of water elimination from GDP-mannose C5″ and C6″, coupled to NADP-mediated hydride transfer from C4″ to C6″. We show that concerted acid-base catalysis from only two active-site groups, Tyr 179 and Glu 157 , promotes a syn 1,4-elimination from an enol (not an enolate) intermediate. We also show that the overall multistep catalytic reaction involves the fewest position changes of enzyme and substrate groups and that it proceeds under conserved exploitation of the basic (minimal) catalytic machinery of short-chain dehydrogenase/reductases.


  • Organizational Affiliation

    Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, NAWI Graz, 8010 Graz, Austria.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
GDP-mannose 4,6 dehydratase352Homo sapiensMutation(s): 1 
Gene Names: GMDS
EC: 4.2.1.47
UniProt & NIH Common Fund Data Resources
Find proteins for O60547 (Homo sapiens)
Explore O60547 
Go to UniProtKB:  O60547
PHAROS:  O60547
GTEx:  ENSG00000112699 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO60547
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
NAP
Query on NAP

Download Ideal Coordinates CCD File 
I [auth B]
K [auth A]
M [auth C]
O [auth D]
S [auth E]
I [auth B],
K [auth A],
M [auth C],
O [auth D],
S [auth E],
V [auth F],
W [auth G],
Z [auth H]
NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
C21 H28 N7 O17 P3
XJLXINKUBYWONI-NNYOXOHSSA-N
GDD
Query on GDD

Download Ideal Coordinates CCD File 
AA [auth H]
J [auth B]
L [auth A]
N [auth C]
P [auth D]
AA [auth H],
J [auth B],
L [auth A],
N [auth C],
P [auth D],
T [auth E],
U [auth F],
X [auth G]
GUANOSINE-5'-DIPHOSPHATE-ALPHA-D-MANNOSE
C16 H25 N5 O16 P2
MVMSCBBUIHUTGJ-GDJBGNAASA-N
EDO
Query on EDO

Download Ideal Coordinates CCD File 
BA [auth H],
Q [auth D],
R [auth D],
Y [auth G]
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.189 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 101.62α = 90
b = 231.06β = 90
c = 383.89γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2019-04-24
    Type: Initial release
  • Version 1.1: 2024-05-15
    Changes: Data collection, Database references