Crystal structure of Internalin B (InlB), a Listeria monocytogenes virulence protein containing SH3-like domains.

Experimental Data Snapshot

  • Resolution: 2.65 Å
  • R-Value Free: 0.302 
  • R-Value Work: 0.273 
  • R-Value Observed: 0.274 

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GW domains of the Listeria monocytogenes invasion protein InlB are SH3-like and mediate binding to host ligands

Marino, M.Banerjee, M.Jonquieres, R.Cossart, P.Ghosh, P.

(2002) EMBO J 21: 5623-5634

  • DOI: https://doi.org/10.1093/emboj/cdf558
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    InlB, a surface-localized protein of Listeria monocytogenes, induces phagocytosis in non-phagocytic mammalian cells by activating Met, a receptor tyrosine kinase. InlB also binds glycosaminoglycans and the protein gC1q-R, two additional host ligands implicated in invasion. We present the structure of InlB, revealing a highly elongated molecule with leucine-rich repeats that bind Met at one end, and GW domains that dissociably bind the bacterial surface at the other. Surprisingly, the GW domains are seen to resemble SH3 domains. Despite this, GW domains are unlikely to act as functional mimics of SH3 domains since their potential proline-binding sites are blocked or destroyed. However, we do show that the GW domains, in addition to binding glycosaminoglycans, bind gC1q-R specifically, and that this binding requires release of InlB from the bacterial surface. Dissociable attachment to the bacterial surface via the GW domains may be responsible for restricting Met activation to a small, localized area of the host cell and for coupling InlB-induced host membrane dynamics with bacterial proximity during invasion.

  • Organizational Affiliation

    Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla 92093-0314, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Internalin B605Listeria monocytogenesMutation(s): 5 
Gene Names: inlB
Find proteins for P0DQD2 (Listeria monocytogenes serovar 1/2a (strain ATCC BAA-679 / EGD-e))
Explore P0DQD2 
Go to UniProtKB:  P0DQD2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0DQD2
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.65 Å
  • R-Value Free: 0.302 
  • R-Value Work: 0.273 
  • R-Value Observed: 0.274 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 48.5α = 90
b = 330.9β = 90
c = 182.4γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-11-06
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-02-14
    Changes: Data collection, Database references, Derived calculations