Expression of modified glycoproteins and glycopeptides
US10457970B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 31, 2017 |
| Grant date | Oct 29, 2019 |
| Priority date | — |
| Expiry date | Oct 31, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07K2317/41
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
The present invention provides recombinant cells that contain a modification causing altered expression or function of at least one mannosyl transferase enzyme. As a result of the modification the cells produce a glycoprotein or glycopeptide that has an N-linked glycan profile that is simplified or humanized. The glycoprotein or glycopeptide can have at least 25% fewer high mannose structures on than the glycoprotein or glycopeptide produced by a cell that does not have the modification. In some embodiments the modification is a deletion, knock out, or disruption of a gene encoding a mannosyl transferase, which can be in an Alg3 gene. Therefore, the proteins produced avoid many of the problems associated with the therapeutic use of glycoproteins from species having foreign or plant-like patterns of glycosylation. The invention also provides compositions of the glycoproteins or glycopeptides and methods of making them.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.