TY - JOUR
T1 - Use of ambr®250 to assess mucic acid production in fed-batch cultures of a marine Trichoderma sp. D-221704
AU - Tamminen, Anu
AU - Turunen, Rosaliina
AU - Barth, Dorothee
AU - Vidgren, Virve
AU - Wiebe, Marilyn G.
N1 - Funding Information:
This research was supported by the Academy of Finland, funding decision 280955.
PY - 2022
Y1 - 2022
N2 - Mucic acid, a diacid with potential use in the food, cosmetic, chemical and pharmaceutical industries, can be produced by microbial conversion of D-galacturonic acid, which is abundant in pectin. Using the ambr®250 bioreactor system, we found that a recently generated transformant (D-221704, formerly referred to as T2) of a marine Trichoderma species produced up to 53 g L−1 mucic acid in glucose-limited fed-batch culture with D-galacturonic acid in the feed at pH 4, with a yield of 0.99 g mucic acid per g D-galacturonic acid consumed. Yeast extract was not essential for high production, but increased the initial production rate. Reducing the amount of glucose as the co-substrate reduced the amount of mucic acid produced to 31 g L−1. Mucic acid could also be produced at pH values less than 4.0 (3.5 and 3.0), but the amount produced was less than at pH 4.0. Furthermore, the yield of mucic acid on D-galacturonic acid at the end of the cultivations (0.5 to 0.7 g g−1) at these low pH levels suggested that recovery may be more difficult at lower pH on account of the high level of crystal formation. Another strain engineered to produce mucic acid, Trichoderma reesei D-161646, produced only 31 g L−1 mucic acid under the conditions used with D-221704.
AB - Mucic acid, a diacid with potential use in the food, cosmetic, chemical and pharmaceutical industries, can be produced by microbial conversion of D-galacturonic acid, which is abundant in pectin. Using the ambr®250 bioreactor system, we found that a recently generated transformant (D-221704, formerly referred to as T2) of a marine Trichoderma species produced up to 53 g L−1 mucic acid in glucose-limited fed-batch culture with D-galacturonic acid in the feed at pH 4, with a yield of 0.99 g mucic acid per g D-galacturonic acid consumed. Yeast extract was not essential for high production, but increased the initial production rate. Reducing the amount of glucose as the co-substrate reduced the amount of mucic acid produced to 31 g L−1. Mucic acid could also be produced at pH values less than 4.0 (3.5 and 3.0), but the amount produced was less than at pH 4.0. Furthermore, the yield of mucic acid on D-galacturonic acid at the end of the cultivations (0.5 to 0.7 g g−1) at these low pH levels suggested that recovery may be more difficult at lower pH on account of the high level of crystal formation. Another strain engineered to produce mucic acid, Trichoderma reesei D-161646, produced only 31 g L−1 mucic acid under the conditions used with D-221704.
KW - Ambr®250
KW - D-galacturonic acid
KW - Galactaric acid
KW - Marine fungi
KW - Mucic acid
KW - Trichoderma
UR - http://www.scopus.com/inward/record.url?scp=85134237278&partnerID=8YFLogxK
U2 - 10.1186/s13568-022-01436-4
DO - 10.1186/s13568-022-01436-4
M3 - Article
C2 - 35831483
AN - SCOPUS:85134237278
SN - 2191-0855
VL - 12
JO - AMB Express
JF - AMB Express
M1 - 90
ER -