Abstract:
:In production of porcine interferon α (pIFN-α) by Pichia pastoris, improper glycerol feeding strategy leads to ethanol accumulation in the last stage of growth phase. In the present study, taking two runs with low ethanol accumulation under 2 g/L as control group, effects of long-term (>4 h) and instantaneous high ethanol concentration (>10 g/L) on pIFN-α production, and activities of key enzymes in carbon metabolism were discussed. As a result, compared with control group, pIFN-α expression level was decreased about 4~12 folds under long-term high ethanol concentration, from the level above 3 g/L to the level under 1 g/L; pIFN-α expression level was decreased about 8 folds under instantaneous high ethanol concentration, reaching to the low level of 0.42 g/L. The low production of pIFN-α was caused by the severe inhibitory effect of ethanol on these enzymes.
journal_name
Appl Biochem Biotechnoljournal_title
Applied biochemistry and biotechnologyauthors
Ding J,Gao M,Hou G,Liang Kdoi
10.1007/s12010-015-1693-0subject
Has Abstractpub_date
2015-08-01 00:00:00pages
1964-74issue
7eissn
0273-2289issn
1559-0291journal_volume
176pub_type
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