Viral peptides with structural homology to protein g of...

C - Chemistry – Metallurgy – 07 – K

Patent

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C07K 14/135 (2006.01) A61K 39/155 (2006.01) A61K 39/42 (2006.01) C07K 16/10 (2006.01) G01N 33/569 (2006.01) A61K 38/00 (2006.01)

Patent

CA 2257943

This invention relates to compounds having structural homology to a contiguous sequence of amino acids within the sequence representing residues 149-197 of the G protein of respiratory syncytial virus, in which a) no oligosaccharide is linked to potential serine, threonine or asparagine attachment sites; b) four cysteine residues are involved in disulphide linkages; and c) the pattern of disulphide linkage is Cys 173 linked to Cys 186, and Cys 176 linked to Cys 182, and in which said compounds possess a biological activity of respiratory syncytial virus G protein, and also encompass biologically-active peptidomimetic and other analogues of these compounds, and antibodies thereto. The compounds of the invention are useful as therapeutic, diagnostic, and screening agents in relation to Pneumoviruses, especially respiratory syncytial virus.

La présente invention concerne des composés présentant une homologie structurelle avec une séquence contiguë d'acides aminés à l'intérieur de la séquence représentant les radicaux 149-197 de la protéine G du virus respiratoire syncytial bovin. Dans de tels composés: a) aucun oligosaccharide n'est lié à des sites d'attachement potentiels de la sérine, de la thréonine ou de l'asparagine; b) quatre radicaux de la cystéine sont impliqués dans des liaisons bisulfure; et c) la liaison bisulfure se fait d'un Cys 173 à un Cys 186 et d'un Cys 176 à un Cys 182. L'activité biologique de tels composants s'apparente à celle de la protéine G du virus respiratoire syncytial bovin. En outre, ces composés englobent un peptidomimétique biologiquement actif et d'autres analogues de ces composés, ainsi que les anticorps correspondants. Les composés de l'invention conviennent comme agents thérapeutiques, comme agents de diagnostic et comme agents de sélection dans le cas des Pneumovirus, et particulièrement du virus respiratoire syncytial bovin.

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