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Transcriptome analysis reveals reasons for the low tolerance of Clostridium tyrobutyricum to furan derivatives.
Suo, Yukai; Li, Wenyi; Wan, Liqiong; Luo, Linshuang; Liu, Shuang; Qin, Shiwen; Wang, Jufang.
Afiliación
  • Suo Y; Key Laboratory of Natural Products Synthetic Biology of Ethnic Medicinal Endophytes, State Ethnic Affairs Commission, Yunnan Minzu University, Kunming, 650504, China.
  • Li W; Key Laboratory of Chemistry in Ethnic Medicinal Resources, State Ethnic Affairs Commission and Ministry of Education, Yunnan Minzu University, Kunming, 650504, China.
  • Wan L; Key Laboratory of Natural Products Synthetic Biology of Ethnic Medicinal Endophytes, State Ethnic Affairs Commission, Yunnan Minzu University, Kunming, 650504, China.
  • Luo L; Key Laboratory of Chemistry in Ethnic Medicinal Resources, State Ethnic Affairs Commission and Ministry of Education, Yunnan Minzu University, Kunming, 650504, China.
  • Liu S; Key Laboratory of Natural Products Synthetic Biology of Ethnic Medicinal Endophytes, State Ethnic Affairs Commission, Yunnan Minzu University, Kunming, 650504, China.
  • Qin S; Key Laboratory of Natural Products Synthetic Biology of Ethnic Medicinal Endophytes, State Ethnic Affairs Commission, Yunnan Minzu University, Kunming, 650504, China.
  • Wang J; Institute of Resource Plants, Yunnan University, Kunming, 650500, China.
Appl Microbiol Biotechnol ; 107(1): 327-339, 2023 Jan.
Article en En | MEDLINE | ID: mdl-36418543
Lignocellulosic biomass is considered the most abundant and renewable feedstock for biobased butyric acid production. However, the furan derivatives (FAs, mainly furfural and 5-hydroxymethylfurfural) generated from the pretreatment of lignocellulose severely inhibit the growth of Clostridium tyrobutyricum, which is the best strain for producing butyric acid. The tolerance mechanism of C. tyrobutyricum to FAs has not been investigated thus far. Here, the response of C. tyrobutyricum ATCC 25755 to FA challenge was first evaluated by using comprehensive transcriptional analysis. The results indicated that the genes related to membrane transport, heat shock proteins, and transcriptional regulation were upregulated under FA stress. However, the expression of almost all genes encoding reductases was not changed, and only the ad gene CTK_RS02625 and the bud gene CTK_RS07810 showed a significant increase of ~ 1.05-fold. Then, the enzyme activity assays indicated that BUD could catalyze the reduction of FAs with relatively low activity and that AD could not participate in the conversion of FAs, indicating that the inability to rapidly convert FAs to their low-toxicity alcohols may be the main reason for the low FA tolerance of C. tyrobutyricum. This research provides insights into the development of FA-tolerant strains, thereby enhancing the bioconversion of lignocellulosic biomass to butyric acid. KEY POINTS: • The response of C. tyrobutyricum to FAs was evaluated for the first time. • Genes encoding membrane transporters and heat shock proteins were triggered by FAs. • A lack of effective FA reductases leads to low FA tolerance in C. tyrobutyricum.
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Texto completo: 1 Bases de datos: MEDLINE Asunto principal: Clostridium tyrobutyricum Idioma: En Revista: Appl Microbiol Biotechnol Año: 2023 Tipo del documento: Article País de afiliación: China

Texto completo: 1 Bases de datos: MEDLINE Asunto principal: Clostridium tyrobutyricum Idioma: En Revista: Appl Microbiol Biotechnol Año: 2023 Tipo del documento: Article País de afiliación: China