6H6N

UbiJ-SCP2 Ubiquinone synthesis protein


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.12 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.198 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

A Soluble Metabolon Synthesizes the Isoprenoid Lipid Ubiquinone.

Hajj Chehade, M.Pelosi, L.Fyfe, C.D.Loiseau, L.Rascalou, B.Brugiere, S.Kazemzadeh, K.Vo, C.D.Ciccone, L.Aussel, L.Coute, Y.Fontecave, M.Barras, F.Lombard, M.Pierrel, F.

(2019) Cell Chem Biol 26: 482-492.e7

  • DOI: 10.1016/j.chembiol.2018.12.001
  • Primary Citation of Related Structures:  
    6H6O, 6H6N, 6H6P

  • PubMed Abstract: 
  • Ubiquinone (UQ) is a polyprenylated lipid that is conserved from bacteria to humans and is crucial to cellular respiration. How the cell orchestrates the efficient synthesis of UQ, which involves the modification of extremely hydrophobic substrates by multiple sequential enzymes, remains an unresolved issue ...

    Ubiquinone (UQ) is a polyprenylated lipid that is conserved from bacteria to humans and is crucial to cellular respiration. How the cell orchestrates the efficient synthesis of UQ, which involves the modification of extremely hydrophobic substrates by multiple sequential enzymes, remains an unresolved issue. Here, we demonstrate that seven Ubi proteins form the Ubi complex, a stable metabolon that catalyzes the last six reactions of the UQ biosynthetic pathway in Escherichia coli. The SCP2 domain of UbiJ forms an extended hydrophobic cavity that binds UQ intermediates inside the 1-MDa Ubi complex. We purify the Ubi complex from cytoplasmic extracts and demonstrate that UQ biosynthesis occurs in this fraction, challenging the current thinking of a membrane-associated biosynthetic process. Collectively, our results document a rare case of stable metabolon and highlight how the supramolecular organization of soluble enzymes allows the modification of hydrophobic substrates in a hydrophilic environment.


    Organizational Affiliation

    Univ. Grenoble Alpes, CNRS, Grenoble INP, TIMC-IMAG, 38000 Grenoble, France. Electronic address: fabien.pierrel@univ-grenoble-alpes.fr.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Ubiquinone biosynthesis protein UbiJA, B131Escherichia coli K-12Mutation(s): 0 
Gene Names: ubiJyigPb3834JW3811
UniProt
Find proteins for P0ADP7 (Escherichia coli (strain K12))
Explore P0ADP7 
Go to UniProtKB:  P0ADP7
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.12 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.198 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 48.3α = 90
b = 67.93β = 90
c = 73.08γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
Aimlessdata scaling
SHELXCDphasing

Structure Validation

View Full Validation Report




Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
France--

Revision History  (Full details and data files)

  • Version 1.0: 2019-02-13
    Type: Initial release
  • Version 1.1: 2019-05-01
    Changes: Data collection, Database references