2BYO

Crystal structure of Mycobacterium tuberculosis lipoprotein LppX (Rv2945c)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.185 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Lppx is a Lipoprotein Required for the Translocation of Phthiocerol Dimycocerosates to the Surface of Mycobacterium Tuberculosis.

Sulzenbacher, G.Canaan, S.Bordat, Y.Neyrolles, O.Stadthagen, G.Roig-Zamboni, V.Rauzier, J.Maurin, D.Laval, F.Daffe, M.Cambillau, C.Gicquel, B.Bourne, Y.Jackson, M.

(2006) Embo J. 25: 1436

  • DOI: 10.1038/sj.emboj.7601048

  • PubMed Abstract: 
  • Cell envelope lipids play an important role in the pathogenicity of mycobacteria, but the mechanisms by which they are transported to the outer membrane of these prokaryotes are largely unknown. Here, we provide evidence that LppX is a lipoprotein re ...

    Cell envelope lipids play an important role in the pathogenicity of mycobacteria, but the mechanisms by which they are transported to the outer membrane of these prokaryotes are largely unknown. Here, we provide evidence that LppX is a lipoprotein required for the translocation of complex lipids, the phthiocerol dimycocerosates (DIM), to the outer membrane of Mycobacterium tuberculosis. Abolition of DIM transport following disruption of the lppX gene is accompanied by an important attenuation of the virulence of the tubercle bacillus. The crystal structure of LppX unveils an U-shaped beta-half-barrel dominated by a large hydrophobic cavity suitable to accommodate a single DIM molecule. LppX shares a similar fold with the periplasmic molecular chaperone LolA and the outer membrane lipoprotein LolB, which are involved in the localization of lipoproteins to the outer membrane of Gram-negative bacteria. Based on the structure and although an indirect participation of LppX in DIM transport cannot yet be ruled out, we propose LppX to be the first characterized member of a family of structurally related lipoproteins that carry lipophilic molecules across the mycobacterial cell envelope.


    Organizational Affiliation

    AFMB, CNRS UMR 6098, Marseille Cedex, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
LIPOPROTEIN LPPX
A
207Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)Mutation(s): 0 
Gene Names: lppX
Find proteins for P9WK65 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Go to UniProtKB:  P9WK65
Small Molecules
Ligands 6 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

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A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
ACT
Query on ACT

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A
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
MLT
Query on MLT

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A
D-MALATE
(2R)-2-HYDROXYBUTANEDIOIC ACID; 2-HYDROXY-SUCCINIC ACID
C4 H6 O5
BJEPYKJPYRNKOW-UWTATZPHSA-N
 Ligand Interaction
OAA
Query on OAA

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A
OXALOACETATE ION
C4 H3 O5
KHPXUQMNIQBQEV-UHFFFAOYSA-M
 Ligand Interaction
LNL
Query on LNL

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A
ALPHA-LINOLENIC ACID
C18 H30 O2
DTOSIQBPPRVQHS-PDBXOOCHSA-N
 Ligand Interaction
HXA
Query on HXA

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A
DOCOSA-4,7,10,13,16,19-HEXAENOIC ACID
C22 H32 O2
MBMBGCFOFBJSGT-KUBAVDMBSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.185 
  • Space Group: P 65 2 2
Unit Cell:
Length (Å)Angle (°)
a = 54.257α = 90.00
b = 54.257β = 90.00
c = 269.983γ = 120.00
Software Package:
Software NamePurpose
SCALAdata scaling
MOSFLMdata reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-03-22
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Refinement description, Version format compliance