ISDA

Deposition Date 2001-11-08

Release Date 2003-03-11

Last Version Date 2024-11-06

Entry Detail

PDB ID:

1GPQ

Keywords:

HYDROLASE/INHIBITOR

Title:

Structure of ivy complexed with its target, HEWL

Biological Source:

Source Organism:

ESCHERICHIA COLI (Taxon ID: 83333)
GALLUS GALLUS (Taxon ID: 9031)

Host Organism:

ESCHERICHIA COLI

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.60 Å

R-Value Free:

0.21

R-Value Work:

0.18

R-Value Observed:

0.18

Space Group:

P 1 21 1

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:INHIBITOR OF VERTEBRATE LYSOZYME
Chain IDs:A, B
Chain Length:135
Number of Molecules:2
Biological Source:ESCHERICHIA COLI

UniProt ID:P0AD59 Pfam ID:PF08816

Protein Blast

Polymer Type:polypeptide(L)
Molecule:LYSOZYME C
Gene (Uniprot):LYZ
Chain IDs:C, D
Chain Length:129
Number of Molecules:2
Biological Source:GALLUS GALLUS

UniProt ID:P00698 Pfam ID:PF00062 EC:3.2.1.17

Primary Citation

Structure and Evolution of the Ivy Protein Family, Unexpected Lysozyme Inhibitors in Gram-Negative Bacteria.

Abergel, C, Monchois, V, Byrne, D, Chenivesse, S, Lembo, F, Lazzaroni, J, Claverie, J, Monchois, V, Abergel, C, Sturgis, J, Jeudy, S, Claverie, J.-M, Abergel, C, Monchois, V, Chenivesse, S, Jeudy, S, Claverie, J.-M.Show

Proc.Natl.Acad.Sci.USA 104 6394 ? (2007)

PMID: 17405861 DOI: 10.1073/PNAS.0611019104

Abstact

Part of an ancestral bactericidal system, vertebrate C-type lysozyme targets the peptidoglycan moiety of bacterial cell walls. We report the crystal structure of a protein inhibitor of C-type lysozyme, the Escherichia coli Ivy protein, alone and in complex with hen egg white lysozyme. Ivy exhibits a novel fold in which a protruding five-residue loop appears essential to its inhibitory effect. This feature guided the identification of Ivy orthologues in other Gram-negative bacteria. The structure of the evolutionary distant Pseudomonas aeruginosa Ivy orthologue was also determined in complex with hen egg white lysozyme, and its antilysozyme activity was confirmed. Ivy expression protects porous cell-wall E. coli mutants from the lytic effect of lysozyme, suggesting that it is a response against the permeabilizing effects of the innate vertebrate immune system. As such, Ivy acts as a virulence factor for a number of Gram-negative bacteria-infecting vertebrates.

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