3F6Z

Crystal structure of Pseudomonas aeruginosa MliC in complex with hen egg white lysozyme


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.238 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural basis for the recognition of lysozyme by MliC, a periplasmic lysozyme inhibitor in Gram-negative bacteria.

Yum, S.Kim, M.J.Xu, Y.Jin, X.L.Yoo, H.Y.Park, J.W.Gong, J.H.Choe, K.M.Lee, B.L.Ha, N.C.

(2009) Biochem.Biophys.Res.Commun. 378: 244-248

  • DOI: 10.1016/j.bbrc.2008.11.039

  • PubMed Abstract: 
  • Lysozymes are an important component of the innate immune system of animals that hydrolyze peptidoglycan, the major bacterial cell wall constituent. Many bacteria have contrived various means of dealing with this bactericidal enzyme, one of which is ...

    Lysozymes are an important component of the innate immune system of animals that hydrolyze peptidoglycan, the major bacterial cell wall constituent. Many bacteria have contrived various means of dealing with this bactericidal enzyme, one of which is to produce lysozyme inhibitors. Recently, a novel family of bacterial lysozyme inhibitors was identified in various Gram-negative bacteria, named MliC (membrane bound lysozyme inhibitor of C-type lysozyme). Here, we report the crystal structure of Pseudomonas aeruginosa MliC in complex with chicken egg white lysozyme. Combined with mutational study, the complex structure demonstrates that the invariant loop of MliC plays a crucial role in the inhibition of the lysozyme by its insertion to the active site cleft of the lysozyme, where the loop forms hydrogen and ionic bonds with the catalytic residues. Since MliC family members have been implicated as putative colonization or virulence factors, the structures and mechanism of action of MliC will be of relevance to the control of bacterial growth in animal hosts.


    Organizational Affiliation

    College of Pharmacy and Research Institute for Drug Development, Pusan National University, Room #311, Pharmacy Building, Jangjeon-dong Geumjeong-gu, Busan 609-735, Republic of Korea.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Lysozyme C
A, C
129Gallus gallusGene Names: LYZ
EC: 3.2.1.17
Find proteins for P00698 (Gallus gallus)
Go to Gene View: LYZ
Go to UniProtKB:  P00698
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Putative uncharacterized protein
B, D
101Pseudomonas aeruginosa (strain ATCC 15692 / PAO1 / 1C / PRS 101 / LMG 12228)Gene Names: mliC
Find proteins for Q9I574 (Pseudomonas aeruginosa (strain ATCC 15692 / PAO1 / 1C / PRS 101 / LMG 12228))
Go to UniProtKB:  Q9I574
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.238 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 175.970α = 90.00
b = 90.960β = 98.17
c = 49.730γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
SCALAdata scaling
ADSCdata collection
MOSFLMdata reduction
CNSrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2008-11-07 
  • Released Date: 2008-12-23 
  • Deposition Author(s): Ha, N.C., Yum, S.

Revision History 

  • Version 1.0: 2008-12-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance