Phage receptor binding proteins for antibacterial therapy...

C - Chemistry – Metallurgy – 07 – K

Patent

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Details

C07K 14/005 (2006.01) A23C 9/12 (2006.01) A61K 38/16 (2006.01) A61L 2/16 (2006.01) A61P 1/00 (2006.01) A61P 31/04 (2006.01) C02F 3/34 (2006.01) G01N 33/569 (2006.01)

Patent

CA 2682444

The subject invention relates in part to novel uses of bacteriophage tail spike proteins (TSPs). Some preferred uses are therapeutic uses in animals, such as chickens, against pathogenic bacteria, such as Salmonella. Fragments of the TSPs can also be used according to the subject invention, particularly protein fragments comprising the phage receptor binding domains (PRBDs), which recognize their hosts and facilitate infection. The binding domains are specific to unique surface structures on bacteria and may be used for a variety of applications according to the subject invention. We have shown that by utilizing these PRBDs, it is possible to exploit the long-established evolutionary relationship between bacteria and their viruses (ie bacteriophages) that specifically infect them. The subject invention also relates in part to novel, synthetic forms of tail spike proteins. In some preferred embodiments, these are hexamers.

La présente invention concerne, en partie, de nouvelles utilisations pour les protéines TSP (tail spike proteins) bactériophages. Certaines utilisations préférées sont à visée thérapeutique chez l'animal tel que le poulet, contre des bactéries pathogènes comme Salmonella. Des fragments de TSP peuvent également être utilisés selon la présente invention, notamment ceux comprenant les domaines de liaison aux récepteurs phagiques (PRBD), qui reconnaissent leurs hôtes et facilitent l'infection. Les domaines de liaison sont spécifiques à des structures superficielles uniques sur les bactéries et peuvent être utilisés pour toute une variété d'applications selon la présente invention. Nous avons démontré qu'en utilisant ces PRBD, il est possible d'exploiter la relation évolutive établie depuis longtemps entre les bactéries et les virus (à savoir les bactériophages) qui les infectent spécifiquement. La présente invention concerne également, en partie, de nouvelles formes synthétiques de protéines TSP. Dans certains modes de réalisation préférés, ce sont des hexamères.

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