2GRV

Crystal Structure of LpqW


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.217 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Hijacking of a Substrate-binding Protein Scaffold for use in Mycobacterial Cell Wall Biosynthesis

Marland, Z.Beddoe, T.Zaker-Tabrizi, L.Lucet, I.S.Brammananth, R.Whisstock, J.C.Wilce, M.C.Coppel, R.L.Crellin, P.K.Rossjohn, J.

(2006) J Mol Biol 359: 983-997

  • DOI: 10.1016/j.jmb.2006.04.012
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The waxy cell wall is crucial to the survival of mycobacteria within the infected host. The cell wall is a complex structure rich in unusual molecules that includes two related lipoglycans, the phosphatidylinositol mannosides (PIMs) and lipoarabinoma ...

    The waxy cell wall is crucial to the survival of mycobacteria within the infected host. The cell wall is a complex structure rich in unusual molecules that includes two related lipoglycans, the phosphatidylinositol mannosides (PIMs) and lipoarabinomannans (LAMs). Many proteins implicated in the PIM/LAM biosynthetic pathway, while attractive therapeutic targets, are poorly defined. The 2.4A resolution crystal structure of an essential lipoprotein, LpqW, implicated in LAM biosynthesis is reported here. LpqW adopts a scaffold reminiscent of the distantly related, promiscuous substrate-binding proteins of the ATP-binding cassette import system. Nevertheless, the unique closed conformation of LpqW suggests that mycobacteria and other closely related pathogens have hijacked this scaffold for use in key processes of cell wall biosynthesis. In silico docking provided a plausible model in which the candidate PIM ligand binds within a marked electronegative region located on the surface of LpqW. We suggest that LpqW represents an archetypal lipoprotein that channels intermediates from a pathway for mature PIM production into a pathway for LAM biosynthesis, thus controlling the relative abundance of these two important components of the cell wall.


    Organizational Affiliation

    The Protein Crystallography Unit, Department of Biochemistry and Molecular Biology, School of Biomedical Sciences, Monash University, Clayton, Vic. 3800, Australia.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
LpqW
A, B, C
621Mycolicibacterium smegmatis MC2 155Mutation(s): 0 
Gene Names: lpqWMSMEG_5130MSMEI_5002
Find proteins for A0R2I8 (Mycolicibacterium smegmatis (strain ATCC 700084 / mc(2)155))
Go to UniProtKB:  A0R2I8
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.217 
  • Space Group: C 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 188.572α = 90
b = 312.035β = 90
c = 104.145γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
ADSCdata collection
DENZOdata reduction
SCALEPACKdata scaling
MLPHAREphasing
DMphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-07-18
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-18
    Changes: Advisory, Refinement description