Abstract
We have studied the expression of a bovine chymosin cDNA in Trichoderma ree- sei to test the ability of this novel fungal host vector system to express and secrete heterologous gene products. Four different expression plasmids were constructed to determine the optimum manner to fuse the chymosin cDNA to the promoter and the terminator of the major T. reesei cellu- lase gene, cellobiohydrolase I (cbhl). All four constructions, when transformed into Trichoderma, determined the secretion of a polypeptide corresponding in size to prochymosin and reacting with antichy- mosin antiserum. This polypeptide had a molecular weight indistinguishable from chymosin and showed milk clotting activity. In preliminary fermentation studies, one transformant secreted as much as 40 mg/1 of active chymosin.
| Original language | English |
|---|---|
| Pages (from-to) | 596-603 |
| Number of pages | 8 |
| Journal | Bio/Technology |
| Volume | 7 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 1 Jan 1989 |
| MoE publication type | A1 Journal article-refereed |
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A novel fungal expression sys1em : Secretion of active calf chymosin from the filamentous fungus trichoderma reesei. / Harkki, A.; Uusitalo, J.; Bailey, M.; Penttila, M.; Knowles, J. K.C.
In: Bio/Technology, Vol. 7, No. 6, 01.01.1989, p. 596-603.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - A novel fungal expression sys1em
T2 - Secretion of active calf chymosin from the filamentous fungus trichoderma reesei
AU - Harkki, A.
AU - Uusitalo, J.
AU - Bailey, M.
AU - Penttila, M.
AU - Knowles, J. K.C.
PY - 1989/1/1
Y1 - 1989/1/1
N2 - We have studied the expression of a bovine chymosin cDNA in Trichoderma ree- sei to test the ability of this novel fungal host vector system to express and secrete heterologous gene products. Four different expression plasmids were constructed to determine the optimum manner to fuse the chymosin cDNA to the promoter and the terminator of the major T. reesei cellu- lase gene, cellobiohydrolase I (cbhl). All four constructions, when transformed into Trichoderma, determined the secretion of a polypeptide corresponding in size to prochymosin and reacting with antichy- mosin antiserum. This polypeptide had a molecular weight indistinguishable from chymosin and showed milk clotting activity. In preliminary fermentation studies, one transformant secreted as much as 40 mg/1 of active chymosin.
AB - We have studied the expression of a bovine chymosin cDNA in Trichoderma ree- sei to test the ability of this novel fungal host vector system to express and secrete heterologous gene products. Four different expression plasmids were constructed to determine the optimum manner to fuse the chymosin cDNA to the promoter and the terminator of the major T. reesei cellu- lase gene, cellobiohydrolase I (cbhl). All four constructions, when transformed into Trichoderma, determined the secretion of a polypeptide corresponding in size to prochymosin and reacting with antichy- mosin antiserum. This polypeptide had a molecular weight indistinguishable from chymosin and showed milk clotting activity. In preliminary fermentation studies, one transformant secreted as much as 40 mg/1 of active chymosin.
UR - http://www.scopus.com/inward/record.url?scp=0024348312&partnerID=8YFLogxK
U2 - 10.1038/nbt0689-596
DO - 10.1038/nbt0689-596
M3 - Article
AN - SCOPUS:0024348312
VL - 7
SP - 596
EP - 603
JO - Nature Biotechnology
JF - Nature Biotechnology
SN - 1087-0156
IS - 6
ER -