Recombinant DNA molecules and expression vectors for tissue plasminogen activator
First Claim
1. A recombinant DNA molecule adapted for expression of tissue plasminogen activator, comprising a nucleic acid molecule encoding mammalian tissue plasminogen activator, an expression control sequence operatively linked thereto and at least one human apolipoprotein B scaffold attachment region (SAR) element wherein the SAR element is other than a 5'"'"' proximal apolipoprotein B SAR element.
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Abstract
A recombinant DNA molecule adapted for transfection of a host cell comprising a nucleic acid molecule encoding mammalian erythropoietin or tissue plasminogen activator, an expression control sequence operatively linked thereto and at least one SAR element. The invention also relates to expression vectors having the recombinant DNA molecule and to mammalian cells transformed with the expression vector. The mammalian cells lack multiple copies of an amplified amplification gene and are capable of expressing recombinant EPO or tPA in vitro at levels of at least 1,500 u or 500 u/106 cells in 24 hours respectively. The invention further relates to a method of expressing recombinant mammalian EPO or tPA using the expression vectors and to a transgenic non-human animal or embryo whose germ cells and somatic cells contain a DNA construct having the recombinant DNA molecule of the invention.
24 Citations
19 Claims
- 1. A recombinant DNA molecule adapted for expression of tissue plasminogen activator, comprising a nucleic acid molecule encoding mammalian tissue plasminogen activator, an expression control sequence operatively linked thereto and at least one human apolipoprotein B scaffold attachment region (SAR) element wherein the SAR element is other than a 5'"'"' proximal apolipoprotein B SAR element.
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18. An expression vector comprising a nucleic acid molecule encoding tissue plasminogen activator having the sequence shown in SEQ ID NO:
- 39 under the control of a promoter wherein said nucleic acid molecule and promoter are flanked by 5'"'"' distal and 3'"'"' human apolipoprotein B scaffold attachment region (SAR) elements.
- View Dependent Claims (19)
Specification