6GPJ

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

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.94 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.211 

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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: 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 ...

    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: 

    Austrian Centre of Industrial Biotechnology, 8010 Graz, Austria.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
GDP-mannose 4,6 dehydrataseA,
D [auth B],
C,
B [auth D]		352Homo sapiensMutation(s): 0 
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
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAP
Query on NAP
Download Ideal Coordinates CCD File 
G [auth A],
J [auth D],
L [auth C],
P [auth B]		NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
C21 H28 N7 O17 P3
XJLXINKUBYWONI-NNYOXOHSSA-N		 Ligand Interaction
G4F
Query on G4F
Download Ideal Coordinates CCD File 
F [auth A],
I [auth D],
K [auth C],
O [auth B]		[[(2~{R},3~{S},4~{R},5~{R})-5-(2-azanyl-6-oxidanylidene-1~{H}-purin-9-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methoxy-oxidanyl-phosphoryl] [(2~{R},3~{S},4~{R},5~{S},6~{R})-5-fluoranyl-6-(hydroxymethyl)-3,4-bis(oxidanyl)oxan-2-yl] hydrogen phosphate
C16 H24 F N5 O15 P2
LDMYSLGOFVDHNN-YVXBHLEUSA-N		 Ligand Interaction
CIT
Query on CIT
Download Ideal Coordinates CCD File 
E [auth A],
N [auth B]		CITRIC ACID
C6 H8 O7
KRKNYBCHXYNGOX-UHFFFAOYSA-N		 Ligand Interaction
EDO
Query on EDO
Download Ideal Coordinates CCD File 
H [auth D],
M [auth B]		1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.94 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.211 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 92.08α = 90
b = 114.438β = 90
c = 140.536γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DIALSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-07-18
    Type: Initial release
  • Version 1.1: 2019-04-24
    Changes: Data collection, Database references