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TitleStructure and functional analysis of the host recognition device of lactococcal phage tuc2009.
Journal, issue, pagesJ Virol, Vol. 87, Issue 15, Page 8429-8440, Year 2013
Publish dateMay 22, 2013
AuthorsBarry Collins / Cecilia Bebeacua / Jennifer Mahony / Stéphanie Blangy / François P Douillard / David Veesler / Christian Cambillau / Douwe van Sinderen /
PubMed AbstractMany phages employ a large heteropolymeric organelle located at the tip of the tail, termed the baseplate, for host recognition. Contrast electron microscopy (EM) of the lactococcal phage Tuc2009 ...Many phages employ a large heteropolymeric organelle located at the tip of the tail, termed the baseplate, for host recognition. Contrast electron microscopy (EM) of the lactococcal phage Tuc2009 baseplate and its host-binding subunits, the so-called tripods, allowed us to obtain a low-resolution structural image of this organelle. Structural comparisons between the baseplate of the related phage TP901-1 and that of Tuc2009 demonstrated that they are highly similar, except for the presence of an additional protein in the Tuc2009 baseplate (BppATuc2009), which is attached to the top of the Tuc2009 tripod structure. Recombinantly produced Tuc2009 or TP901-1 tripods were shown to bind specifically to their particular host cell surfaces and are capable of almost fully and specifically eliminating Tuc2009 or TP901-1 phage adsorption, respectively. In the case of Tuc2009, such adsorption-blocking ability was reduced in tripods that lacked BppATuc2009, indicating that this protein increases the binding specificity and/or affinity of the Tuc2009 tripod to its host receptor.
External linksJ Virol / PubMed:23698314 / PubMed Central
MethodsEM (single particle)
Resolution23.0 - 44.0 Å
Structure data

EMDB-2340:
The electron microscopy reconstruction of the baseplate of lactococcal phage Tuc2009.
Method: EM (single particle) / Resolution: 36.0 Å

EMDB-2343:
The electron microscopy reconstruction of the BppU-CtAL tripod of lactococcal phage Tuc2009.
Method: EM (single particle) / Resolution: 23.0 Å

EMDB-2345:
The electron microscopy reconstruction of the tripod of lactococcal phage Tuc2009.
Method: EM (single particle) / Resolution: 44.0 Å

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