Download MendeleyX-ray structure of a superinfection exclusion lipoprotein from phage TP-J34 and identification of the tape measure protein as its target.
Bebeacua, C., Lorenzo Fajardo, J.C., Blangy, S., Spinelli, S., Bollmann, S., Neve, H., Cambillau, C., Heller, K.J.(2013) Mol Microbiol 89: 152-165
- PubMed: 23692331
- DOI: https://doi.org/10.1111/mmi.12267
- Primary Citation of Related Structures:
4EQQ - PubMed Abstract:
Lipoproteins of temperate phage are a broad family of membrane proteins encoded in the lysogeny module of temperate phages. Expression of the ltp(TP-J34) gene of temperate Streptococcus thermophilus phage TP-J34 interferes with phage infection at the stage of triggering DNA release and injection into the cell. Here, we report the first structure of a superinfection exclusion protein. We have expressed and determined the X-ray structure of Ltp(TP-J34). The soluble domain of Ltp(TP-J34) is composed of a tandem of three-helix helix-turn-helix (HTH) domains exhibiting a highly negatively charged surface. By isolating mutants of lactococcal phage P008wt with reduced sensitivities to Ltp(TP-J34) and by genome sequencing of such mutants we obtained evidence supporting the notion that Ltp(TP-J34) targets the phage's tape measure protein (TMP) and blocks its insertion into the cytoplasmic membrane.
Organizational Affiliation:
Architecture et Fonction des Macromolecules Biologiques, UMR 7257, CNRS and Aix-Marseille University, Case 932, 163 Avenue de Luminy, 13288, Marseille, Cedex 09, France.
