Inventors:
Robert J. Desnick - New York NY
David F. Bishop - New York NY
Yiannis A. Ioannou - New York NY
Assignee:
Mount Sinai School of Medicine of the City of New York - New York NY
International Classification:
C12N 940, C12N 1500, C12N 500, C12N 120
Abstract:
The present invention involves the production of large quantities of human. alpha. -Gal A by cloning and expressing the. alpha. -Gal A coding sequence in eukaryotic host cell expression systems. The eukaryotic expression systems, and in particular the mammalian host cell expression system described herein provide for the appropriate cotranslational and posttranslational modifications required for proper processing, e. g. , glycosylation, phosphorylation, etc. and sorting of the expression product so that an glycosylation, phosphorylation, etc. and sorting of the expression product so that an active enzyme is produced. In addition, the expression of fusion proteins which simplify purification is described.
Using the methods described herein, the recombinant. alpha. -Gal A is secreted by the engineered host cells so that it is recovered from the culture medium in good yield. The. alpha.