3DNF

Structure of (E)-4-Hydroxy-3-methyl-but-2-enyl Diphosphate Reductase, the Terminal Enzyme of the Non-Mevalonate Pathway


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.194 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure of (E)-4-Hydroxy-3-methyl-but-2-enyl Diphosphate Reductase, the Terminal Enzyme of the Non-Mevalonate Pathway.

Rekittke, I.Wiesner, J.Demmer, U.Warkentin, E.Xu, W.Troschke, K.Hintz, M.No, J.H.Duin, E.C.Oldfield, E.Jomaa, H.Ermler, U.

(2008) J Am Chem Soc 

  • DOI: 10.1021/ja806668q
  • Primary Citation of Related Structures:  
    3DNF

  • PubMed Abstract: 
  • Molecular evolution has evolved two metabolic routes for isoprenoid biosynthesis: the mevalonate and the 2-C-methyl-D-erythritol-4-phosphate (MEP) pathway. The MEP pathway is used by most pathogenic bacteria and some parasitic protozoa (including the mal ...

    Molecular evolution has evolved two metabolic routes for isoprenoid biosynthesis: the mevalonate and the 2-C-methyl-D-erythritol-4-phosphate (MEP) pathway. The MEP pathway is used by most pathogenic bacteria and some parasitic protozoa (including the malaria parasite, Plasmodium falciparum) as well as by plants, but is not present in animals. The terminal reaction of the MEP pathway is catalyzed by (E)-4-hydroxy-3-methyl-but-2-enyl diphosphate (HMBPP) reductase (LytB), an enzyme that converts HMBPP into isopentenyl diphosphate (IPP) and dimethylallyl diphosphate (DMAPP). Here, we present the structure of Aquifex aeolicus LytB, at 1.65 A resolution. The protein adopts a cloverleaf or trefoil-like structure with each monomer in the dimer containing three alpha/beta domains surrounding a central [Fe3S4] cluster ligated to Cys13, Cys96, and Cys193. Two highly conserved His (His 42 and His 124) and a totally conserved Glu (Glu126) are located in the same central site and are proposed to be involved in ligand binding and catalysis. Substrate access is proposed to occur from the front-side face of the protein, with the HMBPP diphosphate binding to the two His and the 4OH of HMBPP binding to the fourth iron thought to be present in activated clusters, while Glu126 provides the protons required for IPP/DMAPP formation.


    Organizational Affiliation

    Institut für Klinische Immunologie and Transfusionsmedizin, Justus-Liebig-Universität Giessen, Langhansstrasse 7, 35385 Giessen, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
4-hydroxy-3-methylbut-2-enyl diphosphate reductase AB297Aquifex aeolicusMutation(s): 0 
Gene Names: ispHlytBaq_1739
EC: 1.17.1.2 (PDB Primary Data), 1.17.7.4 (UniProt)
Find proteins for O67625 (Aquifex aeolicus (strain VF5))
Explore O67625 
Go to UniProtKB:  O67625
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
F3S
Query on F3S

Download Ideal Coordinates CCD File 
A, B
FE3-S4 CLUSTER
Fe3 S4
FCXHZBQOKRZXKS-MZMDZPPWAW
 Ligand Interaction
GOL
Query on GOL

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.194 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 60.37α = 90
b = 87.76β = 95.13
c = 72.4γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MAR345dtbdata collection
XDSdata reduction
XDSdata scaling
SHARPphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2008-07-02 
  • Released Date: 2008-12-30 
  • Deposition Author(s): Rekittke, I.

Revision History 

  • Version 1.0: 2008-12-30
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2020-09-09
    Changes: Database references, Derived calculations