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|Title:||Human growth hormone|
|Abstract:||Described are methods and means for the construction and microbial expression of quasi-synthetic genes arising from the combination of organic synthesis and enzymatic reverse transcription from messenger RNA sequences incomplete from the standpoint of the desired protein product. Preferred products of expression lack bio-inactivating leader sequences common in eukaryotic expression products but problematic with regard to microbial cleavage to yield bioactive material. Illustrative is a preferred embodiment in which a gene coding for human growth hormone (useful in, e.g., treatment of hypopituitary dwarfism) is constructed and expressed.|
|Inventor(s):||Goeddel; David V. (Burlingame, CA), Heyneker; Herbert L. (Burlingame, CA)|
|Assignee:||Genentech, Inc. (South San Francisco, CA)|
|Filing Date:||May 27, 1994|
|Claims:||1. A method of producing a protein consisting essentially of amino acids 1-191 of human growth hormone comprising: |
(a) expressing in a transformant bacterium, DNA coding for a human growth hormone conjugate protein, which conjugate protein consists essentially of amino acids 1-191 of human growth hormone as set forth in confined FIGS. 1 and 3 unaccompanied by the leader sequence of human growth hormone or other extraneous protein bound thereto and an additional amino acid sequence which is specifically cleaveable by enzymatic action, and
(b) cleaving extracellularly sid conjugate protein by enzymatic action to produce said protein consisting essentially of amino acids 1-191 of human growth hormone.
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