Insulin-like growth factor binding protein-3 variants

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 15/12 (2006.01) C07K 14/47 (2006.01) C12N 15/62 (2006.01)

Patent

CA 2336295

The invention relates to variants of native insulin-like growth factor binding protein 3(IGFBP-3). Variant IGFBP-3s are disclosed which are modified to be resistant to hydrolysis. Also disclosed are variant IGFBP-3s where the nuclear localization signal (NLS) in native IGFBP-3 is altered. Additionally, amino- terminally extended IGFBP-3s are disclosed which include a variety of N- terminal extensions, including peptide and nucleotide binding domains, specific binding members such as ligand binding domains from receptors or antigen binding domains from immunoglobins, and peptide and protein hormones and growth factors. N-terminally extended IGFBP-3s may comprise hydrolysis- resistant or NLS variant IGFBP-3s.

L'invention porte sur des variantes de la protéine 3 de liaison native du facteur de croissance insulinoïde (IGFBP-3). Ces variantes sont modifiées de façon à résister à l'hydrolyse. L'invention porte également sur des variantes d'IGFBP-3 dans lesquelles le signal de localisation nucléaire est modifié dans IGFBP-3 native. L'invention porte, de plus, sur des IGFBP-3 allongées, à terminaison amino, qui comprennent une variété d'extensions à extrémité N terminale telles que des domaines de liaison peptidiques et nucléotidiques, des éléments de liaison spécifiques tels que des domaines de liaison de ligands à partir de récepteurs ou des domaines de liaison d'antigènes à partir d'immunoglobines, des hormones peptidiques et protéiniques et des facteurs de croissance. Les IGFBP-3 à extension N-terminal peuvent présenter une résistance à l'hydrolyse ou des variantes à signal de localisation nucléaire.

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