1DZT

RMLC FROM SALMONELLA TYPHIMURIUM


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.232 
  • R-Value Observed: 0.232 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Rmlc, the Third Enzyme of Dtdp-L-Rhamnose Pathway, is a New Class of Epimerase.

Giraud, M.F.Leonard, G.A.Field, R.A.Berlind, C.Naismith, J.H.

(2000) Nat Struct Biol 7: 398

  • DOI: 10.1038/75178
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Deoxythymidine diphosphate (dTDP)-L-rhamnose is the precursor of L-rhamnose, a saccharide required for the virulence of some pathogenic bacteria. dTDP-L-rhamnose is synthesized from glucose-1-phosphate and deoxythymidine triphosphate (dTTP) via a pat ...

    Deoxythymidine diphosphate (dTDP)-L-rhamnose is the precursor of L-rhamnose, a saccharide required for the virulence of some pathogenic bacteria. dTDP-L-rhamnose is synthesized from glucose-1-phosphate and deoxythymidine triphosphate (dTTP) via a pathway involving four distinct enzymes. This pathway does not exist in humans and the enzymes involved in dTDP-L-rhamnose synthesis are potential targets for the design of new therapeutic agents. Here, the crystal structure of dTDP-6-deoxy-D-xylo-4-hexulose 3,5 epimerase (RmlC, EC5.1.3.13) from Salmonella enterica serovar Typhimurium was determined. The third enzyme of the rhamnose biosynthetic pathway, RmlC epimerizes at two carbon centers, the 3 and 5 positions of the sugar ring. The structure was determined by multiwavelength anomalous diffraction to a resolution of 2.17 A. RmlC is a dimer and each monomer is formed mainly from two beta-sheets arranged in a beta-sandwich. The structure of a dTDP-phenol-RmlC complex shows the substrate-binding site to be located between the two beta-sheets; this site is formed from residues of both monomers. Sequence alignments of other RmlC enzymes confirm that this region is very highly conserved. The enzyme is distinct structurally from other epimerases known and thus, is the first example of a new class of carbohydrate epimerase.


    Organizational Affiliation

    Centre for Biomolecular Sciences, North Haugh, The University, St. Andrews, Fife KY16 9ST, Scotland.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DTDP-4-DEHYDRORHAMNOSE 3\,5-EPIMERASEA, B183Salmonella enterica subsp. enterica serovar TyphimuriumMutation(s): 0 
EC: 5.1.3.13
Find proteins for P26394 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Explore P26394 
Go to UniProtKB:  P26394
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
TPE
Query on TPE

Download CCD File 
A
3'-O-ACETYLTHYMIDINE-(5' DIPHOSPHATE PHENYL ESTER)
C18 H22 N2 O12 P2
FBXZTUIVKSOQAY-ARFHVFGLSA-N
 Ligand Interaction
ATY
Query on ATY

Download CCD File 
B
3'-O-ACETYLTHYMIDINE-5'-DIPHOSPHATE
C12 H18 N2 O12 P2
UWSIAAWKEICIJY-IVZWLZJFSA-N
 Ligand Interaction
SO4
Query on SO4

Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
GOL
Query on GOL

Download CCD File 
A, B
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.232 
  • R-Value Observed: 0.232 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 71.8α = 90
b = 71.8β = 90
c = 184.45γ = 120
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-04-18
    Type: Initial release
  • Version 1.1: 2011-08-17
    Changes: Atomic model, Derived calculations, Non-polymer description, Other, Refinement description, Source and taxonomy, Structure summary, Version format compliance