Abbott Laboratories Corporation

Robert George Hards

Pradip Mukerji

Jennifer M Thurmond

Lennart Hansson

Jeffrey Harris Baxter

Amanda Eun-Yeong Leonard

The subject invention relates to methods of processing and producing recombinant proteins in vivo, for example, recombinant phosphorylated beta-casein. The subject invention also relates to the proteins produced by these methods as well as to uses of these proteins.

Methods of producing a recombinant protein

The present invention provides a plasmid containing a promoter sequence, a nucleotide sequence encoding an exogenous protein, and a nucleotide sequence encoding an enzyme capable of modifying the exogenous protein. In a specific embodiment of the invention the encoded exogenous protein is human .beta.-casein and the encoded enzyme is a human kinase capable of phosphorylating recombinant .beta.-casein in a bacterial system. Phosphorylated recombinant human .beta.-casein synthesized using the plasmid of the invention is shown to have the same bioactivity as native human .beta.-casein.

Phosphorylated recombinant human .beta.-casein expressed in a bacterial

The present invention provides a method of producing phophorylated, recombinant human .beta.-casein having 3 to 5 phosphates in a bacterial cell using a single vector containing in tandem both the nucleotide sequence encoding .beta.-casein and a sequence encoding the enzyme CKII .beta..alpha. which is capable of phosphorylating human .beta.-casein.

Method for expressing phosphorylated recombinant human .beta.-casein in

The present invention provides a plasmid containing a promoter sequence, a nucleotide sequence encoding an exogenous protein, and a nucleotide sequence encoding an enzyme capable of modifying the exogenous protein. In a specific embodiment of the invention the encoded exogenous protein is human .beta.-casein and the encoded enzyme is a human kinase capable of phosphorylating recombinant .beta.-casein in a bacterial system. Phosphorylated recombinant human .beta.-casein having 3 or more phosphate groups and synthesized using the plasmid of the invention is shown to have the same bioactivity as native human .beta.-casein.

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Delaware, OH, United States of America

Robert George Hards