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Heterologous Biosynthesis of Hyaluronic Acid Using a New Hyaluronic Acid Synthase Derived from the Probiotic Streptococcus thermophilus
被引:3
作者:
Zhong, Qian
[1
,2
]
Ma, Yanqin
[2
]
Xu, Delei
[3
]
Lei, Peng
[2
]
Li, Sha
[2
]
Xu, Hong
[2
]
Qiu, Yibin
[1
,2
]
机构:
[1] Qilu Univ Technol, Shandong Acad Sci, State Key Lab Biobased Mat & Green Papermaking, Jinan 250353, Peoples R China
[2] Nanjing Tech Univ, Coll Food Sci & Light Ind, State Key Lab Mat Oriented Chem Engn, Nanjing 211816, Peoples R China
[3] Changshu Inst Technol, Coll Biol & Food Engn, Changshu 215500, Peoples R China
来源:
FERMENTATION-BASEL
|
2023年
/
9卷
/
06期
基金:
中国国家自然科学基金;
关键词:
hyaluronic acid;
cell factory;
hyaluronic acid synthetase;
Streptococcus thermophilus;
synthetic biology;
BACILLUS-SUBTILIS;
MOLECULAR-WEIGHT;
GENES;
D O I:
10.3390/fermentation9060510
中图分类号:
Q81 [生物工程学(生物技术)];
Q93 [微生物学];
学科分类号:
071005 ;
0836 ;
090102 ;
100705 ;
摘要:
Hyaluronic acid (HA) is a natural linear polysaccharide extensively used in many fields, including the food, medicine, and cosmetics industries. Currently, species that produce HA synthetase (HAS) from microbial sources are relatively small and mainly pathogenic, such as Streptococcus pyogenes and Pasteurella multicide. Moreover, there is limited research on the safe microbial sources of HAS. Thus, we characterized SthasA, a HAS derived from the probiotic Streptococcus thermophilus, and used it for the de novo synthesis of HA in a chassis strain of Bacillus amyloliquefaciens. Metabolic engineering of the precursor supply modules suggested that hasB (encoding UDPG dehydrogenase), which was derived from Corynebacterium glutamicum ATCC 13032, effectively promoted the accumulation of HA products. Furthermore, by combining the expression of the global regulatory factor CcpA, HA yield from the recombinant strain reached 3.20 g/L. Finally, we obtained a yield of 5.57 g/L HA with a molecular weight of 1.7 x 10(6) Da using various process optimization strategies in a 5 L bioreactor. This study enriches our understanding of obtaining HAS from non-pathogenic bacteria and provides a safe and effective process for producing HA, which has the potential to promote the industrial applications of HA further.
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页数:17
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