1KC3

Crystal structure of dTDP-6-deoxy-L-lyxo-4-hexulose reductase (RmlD) in complex with NADPH and dTDP-L-rhamnose

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.196 

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This is version 1.2 of the entry. See complete history. 


Literature

Variation on a theme of SDR. dTDP-6-deoxy-L- lyxo-4-hexulose reductase (RmlD) shows a new Mg2+-dependent dimerization mode.

Blankenfeldt, W., Kerr, I.D., Giraud, M.F., McMiken, H.J., Leonard, G., Whitfield, C., Messner, P., Graninger, M., Naismith, J.H.

(2002) Structure 10: 773-786

  • DOI: 10.1016/s0969-2126(02)00770-0
  • Primary Citation of Related Structures:  
    1KBZ, 1KC3, 1KC1, 1N2S

  • PubMed Abstract: 

    • dTDP-6-deoxy-L-lyxo-4-hexulose reductase (RmlD) catalyzes the final step in the conversion of dTDP-D-glucose to dTDP-L-rhamnose in an NAD(P)H- and Mg2+-dependent reaction. L-rhamnose biosynthesis is an antibacterial target. The structure of RmlD from Salmonella enterica serovar Typhimurium has been determined, and complexes with NADH, NADPH, and dTDP-L-rhamnose are reported ...

    dTDP-6-deoxy-L-lyxo-4-hexulose reductase (RmlD) catalyzes the final step in the conversion of dTDP-D-glucose to dTDP-L-rhamnose in an NAD(P)H- and Mg2+-dependent reaction. L-rhamnose biosynthesis is an antibacterial target. The structure of RmlD from Salmonella enterica serovar Typhimurium has been determined, and complexes with NADH, NADPH, and dTDP-L-rhamnose are reported. RmlD differs from other short chain dehydrogenases in that it has a novel dimer interface that contains Mg2+. Enzyme catalysis involves hydride transfer from the nicotinamide ring of the cofactor to the C4'-carbonyl group of the substrate. The substrate is activated through protonation by a conserved tyrosine. NAD(P)H is bound in a solvent-exposed cleft, allowing facile replacement. We suggest a novel role for the conserved serine/threonine residue of the catalytic triad of SDR enzymes.

    Related Citations: 
    • Overexpression, purification, crystallisation and preliminary structural study of dTDP-6-deoxy-lyxo-4-reductase (RmlD) the fourth enzyme of the dTDP-rhanose synthesis pathway,from Salmonella entrica serovar Typhimurim
      Giraud, M.F., McMiken, H.J., Leonard, G.A., Messner, P., Whitfield, C., Naismith, J.H.
      (1999) Acta Crystallogr D Biol Crystallogr 55: 2043
    • The rhamnose pathway
      Giraud, M.F., Naismith, J.H.
      (2000) Curr Opin Struct Biol 10: 687
    Organizational Affiliation: 

    The Centre for Biomolecular Sciences, The University, St. Andrews, KY16 9ST, Scotland, United Kingdom.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
dTDP-glucose oxidoreductase A299Salmonella enterica subsp. enterica serovar TyphimuriumMutation(s): 0 
Gene Names: rfbA
EC: 1.1.1.133
Find proteins for P26392 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Explore P26392 
Go to UniProtKB:  P26392
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NDP
Query on NDP
Download Ideal Coordinates CCD File 
A
NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
C21 H30 N7 O17 P3
ACFIXJIJDZMPPO-NNYOXOHSSA-N		 Ligand Interaction
TRH
Query on TRH
Download Ideal Coordinates CCD File 
A
2'-DEOXY-THYMIDINE-BETA-L-RHAMNOSE
C16 H26 N2 O15 P2
ZOSQFDVXNQFKBY-CGAXJHMRSA-N		 Ligand Interaction
MG
Query on MG
Download Ideal Coordinates CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.196 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 47.98α = 90
b = 72.261β = 90
c = 82.682γ = 90
Software Package:
Software NamePurpose
SOLVEphasing
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-06-28
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance