Exploring the Effect of Conjugation Site and Chemistry on the Immunogenicity of an anti-Group B<i>Streptococcus</i>Glycoconjugate Vaccine Based on GBS67 Pilus Protein and Type V Polysaccharide
proven efficient for the site selective coupling of GBS capsular polysaccharides (PSs). Herein, we explored the effect of conjugation of typeVpolysaccharide onto predetermined lysine or tyrosine residues of the GBS67pilusprotein with the dual role of T-cell carrier for the PS and antigen. For the preparation of a conjugate at predetermined lysine residues of the protein, we investigated a two-step
A process is provided for preparing a conjugate of Formula (I-A) or (I) comprising a polypeptide containing n number of tyrosine units, where n is an integer greater than or equal to 1, dispersed within the amino acid chain
having and amino terminus end (A
1
) and an acid terminus end (A
2
) of the protein or polypeptide and having a weight average molecular weight equal to or greater than 10,000 Daltons (10 kDa), wherein the conjugate comprises a number m of tyrosine conjugates (modified tyrosine residues) as depicted in Formula (I-A) or (I), where m is at least one and is less than or equal to n:
where X, Lg, L and R are as defined herein.
A process is provided for preparing a conjugate of Formula (I-A) or (I) comprising a polypeptide containing n number of tyrosine units, where n is an integer greater than or equal to 1, dispersed within the amino acid chain
having and amino terminus end (A1) and an acid terminus end (A2) of the protein or polypeptide and having a weight average molecular weight equal to or greater than 10,000 Daltons (10 kDa), wherein the conjugate comprises a number m of tyrosine conjugates (modified tyrosine residues) as depicted in Formula (I-A) or (I), where m is at least one and is less than or equal to n:
where X, Lg, L and R are as defined herein.
[EN] TYROSINE LIGATION PROCESS<br/>[FR] PROCÉDÉ DE LIGATURE DE LA TYROSINE
申请人:NOVARTIS AG
公开号:WO2013009564A1
公开(公告)日:2013-01-17
A process is provided for preparing a conjugate of Formula (I-A) or (I) comprising a polypeptide (or a protein) containing n number of tyrosine units, where n is an integer greater than or equal to 1, dispersed within the amino acid chain having an amino terminus end (A1) and an acid terminus end (A2) of the protein or polypeptide (either the amino or acid terminus end can be the at least one tyrosine unit) and having a weight average molecular weight equal to or greater than 10,000 Daltons (10 kDa), wherein the conjugate comprises a number m of tyrosine conjugates (modified tyrosine residues) as depicted in Formula (I-A) or (I), where m is at least one and is less than or equal to n: where X, Lg, L and R are as defined herein.