Light calcium carbonate improves pullulan biosynthesis by Aureobasidium pullulans under high concentration of sugar
文献类型： 外文期刊
作者： Yang, Jinyu 1 ; Li, Xiwen 1 ; Zhao, Shuangzhi 1 ; Yuan, Wei 1 ; Zhou, Qingxin 1 ; Zhang, Yanhao 1 ; Qiu, Jiying 1 ; Wang, Junhua 1 ; Zhu, Qingjun 1 ; Yang, Xiaoyu 1 ; Jiang, Xiaoxiao 1 ; Tian, Chengsen 3 ; Chen, Leilei 1 ;
作者机构： 1.Shandong Acad Agr Sci, Inst Agrofood Sci & Technol, Key Lab Agroprod Proc Technol Shandong Prov, Key Lab Novel Food Resources Proc,Minist Agr & Rur, Jinan 250100, Peoples R China
2.Shandong Normal Univ, Coll Life Sci, Jinan 250014, Peoples R China
3.Qilu Normal Univ, Sch Chem & Chem Engn, Jinan 250200, Peoples R China
4.Jiangnan Univ, Sch Biotechnol, Key Lab Ind Biotechnol, Minist Educ, Wuxi 214122, Peoples R China
5.Shandong Acad Agr Sci, Inst Agrofood Sci & Technol, 23788 Gongye Bei Rd, Jinan 250100, Peoples R China
关键词： Aureobasidium pullulans; Pullulan biosynthesis; Light CaCO 3; Osmophiles; Key biosynthetic enzymes
期刊名称：FOOD CHEMISTRY （ 影响因子：8.8； 五年影响因子：8.6 ）
ISSN： 0308-8146
年卷期： 2023 年 415 卷
页码：
收录情况： SCI
摘要： The effects of light calcium carbonate (CaCO3) on pullulan biosynthesis by Aureobasidium pullulans NCPS2016 were investigated. Light CaCO3 enhanced pullulan production by 12.4 % when added to the low concentration of fructose broth compared with K2HPO4. Pullulan production was further improved when increasing both the concentrations of light CaCO3 and fructose. Compared to K2HPO4, light CaCO3 improved the activities of UDP-glucose pyrophosphorylase, alpha-phosphoglucose mutase, UDP-glucosyltransferase, and glucosyltransferase rele-vant to pullulan biosynthesis, and the gene transcriptional levels of UDP-glucose pyrophosphorylase, alpha-phos-phoglucose mutase, UDP-glucosyltransferase, and glucose kinase were enhanced. During 30-liter fermentation, 144.3 g/L of purified pullulan was produced from 200 g/L of fructose and 15 g/L of light CaCO3 within 168 h, with the yield and productivity of 0.72 g/g and 0.86 g/L/h respectively. This is the first report that light CaCO3 improves pullulan production significantly.
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