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Chen S, Yang H, Chen M, Liu W, Tian S, Mu R, Jia F, Liu C, Ma G, Sun X, Chen G. Inhibition of Monilinia fructicola sporulation and pathogenicity through eucalyptol-mediated targeting of MfCat2 by Streptomyces lincolnensis strain JCP1-7. MOLECULAR PLANT PATHOLOGY 2024; 25:e13484. [PMID: 38973095 PMCID: PMC11227988 DOI: 10.1111/mpp.13484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Revised: 04/05/2024] [Accepted: 05/17/2024] [Indexed: 07/09/2024]
Abstract
Peach brown rot, attributed to Monilinia fructicola, presents a significant threat to postharvest peach cultivation, causing losses of up to 80%. With an increasing number of countries, spearheaded by the European Union, imposing bans on chemical agents in fruit production, there is a growing interest in mining highly active antibacterial compounds from biological control strains for postharvest disease management. In this study, we highlight the unique ability of Streptomyces lincolnensis strain JCP1-7 to inhibit M. fructicola sporulation, despite its limited antimicrobial efficacy. Through GC-MS analysis, eucalyptol was identified as the key compound. Fumigation of diseased fruits with eucalyptol at a concentration of 0.0335 μg cm-3 demonstrated an in vivo inhibition rate against M. fructicola of 93.13%, completely suppressing spore formation. Transcriptome analysis revealed the impact of eucalyptol on multiple pathogenesis-related pathways, particularly through the inhibition of catalase 2 (Cat2) expression. Experiments with a MfCat2 knockout strain (ΔMfCat2) showed reduced pathogenicity and sensitivity to JCP1-7 and eucalyptol, suggesting MfCat2 as a potential target of JCP1-7 and eucalyptol against M. fructicola. Our findings elucidate that eucalyptol produced by S. lincolnensis JCP1-7 inhibits M. fructicola sporulation by regulating MfCat2, thereby effectively reducing postharvest peach brown rot occurrence. The use of fumigation of eucalyptol offers insights into peach brown rot management on a large scale, thus making a significant contribution to agricultural research.
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Affiliation(s)
- Shan Chen
- Chongqing Key Laboratory of Plant Disease Biology, College of Plant ProtectionSouthwest UniversityChongqingChina
| | - Haorong Yang
- Chongqing Key Laboratory of Plant Disease Biology, College of Plant ProtectionSouthwest UniversityChongqingChina
| | - Meijun Chen
- Chongqing Key Laboratory of Plant Disease Biology, College of Plant ProtectionSouthwest UniversityChongqingChina
- Key Scientific Research Base of Pest and Mold Control of Heritage CollectionChongqing China Three Gorges Museum, State Administration of Cultural HeritageChongqingChina
| | - Weina Liu
- Chongqing Key Laboratory of Plant Disease Biology, College of Plant ProtectionSouthwest UniversityChongqingChina
- Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze RiverMinistry of EducationChongqingChina
| | - Shaorui Tian
- Chongqing Key Laboratory of Plant Disease Biology, College of Plant ProtectionSouthwest UniversityChongqingChina
- Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze RiverMinistry of EducationChongqingChina
| | - Rong Mu
- Chongqing Key Laboratory of Plant Disease Biology, College of Plant ProtectionSouthwest UniversityChongqingChina
| | - Fan Jia
- Chongqing Key Laboratory of Plant Disease Biology, College of Plant ProtectionSouthwest UniversityChongqingChina
| | - Changyun Liu
- Chongqing Key Laboratory of Plant Disease Biology, College of Plant ProtectionSouthwest UniversityChongqingChina
- Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze RiverMinistry of EducationChongqingChina
| | - Guanhua Ma
- Chongqing Key Laboratory of Plant Disease Biology, College of Plant ProtectionSouthwest UniversityChongqingChina
| | - Xianchao Sun
- Chongqing Key Laboratory of Plant Disease Biology, College of Plant ProtectionSouthwest UniversityChongqingChina
- Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze RiverMinistry of EducationChongqingChina
| | - Guokang Chen
- Chongqing Key Laboratory of Plant Disease Biology, College of Plant ProtectionSouthwest UniversityChongqingChina
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Zheng R, Chen Q, Yang Q, Gong T, Hu CY, Meng Y. Engineering a Carotenoid Cleavage Oxygenase for Coenzyme-Free Synthesis of Vanillin from Ferulic Acid. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:12209-12218. [PMID: 38751167 DOI: 10.1021/acs.jafc.4c01688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
One-pot biosynthesis of vanillin from ferulic acid without providing energy and cofactors adds significant value to lignin waste streams. However, naturally evolved carotenoid cleavage oxygenase (CCO) with extreme catalytic conditions greatly limited the above pathway for vanillin bioproduction. Herein, CCO from Thermothelomyces thermophilus (TtCCO) was rationally engineered for achieving high catalytic activity under neutral pH conditions and was further utilized for constructing a one-pot synthesis system of vanillin with Bacillus pumilus ferulic acid decarboxylase. TtCCO with the K192N-V310G-A311T-R404N-D407F-N556A mutation (TtCCOM3) was gradually obtained using substrate access channel engineering, catalytic pocket engineering, and pocket charge engineering. Molecular dynamics simulations revealed that reducing the site-blocking effect in the substrate access channel, enhancing affinity for substrates in the catalytic pocket, and eliminating the pocket's alkaline charge contributed to the high catalytic activity of TtCCOM3 under neutral pH conditions. Finally, the one-pot synthesis of vanillin in our study could achieve a maximum rate of up to 6.89 ± 0.3 mM h-1. Therefore, our study paves the way for a one-pot biosynthetic process of transforming renewable lignin-related aromatics into valuable chemicals.
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Affiliation(s)
- Rong Zheng
- Engineering Research Center for High-Valued Utilization of Fruit Resources in Western China, Ministry of Education; National Research & Development Center of Apple Processing Technology; College of Food Engineering and Nutritional Science, Shaanxi Normal University, 620 West Changan Avenue, Xian 710119, Shaanxi, P. R. China
| | - Qihang Chen
- Engineering Research Center for High-Valued Utilization of Fruit Resources in Western China, Ministry of Education; National Research & Development Center of Apple Processing Technology; College of Food Engineering and Nutritional Science, Shaanxi Normal University, 620 West Changan Avenue, Xian 710119, Shaanxi, P. R. China
| | - Qingbo Yang
- Engineering Research Center for High-Valued Utilization of Fruit Resources in Western China, Ministry of Education; National Research & Development Center of Apple Processing Technology; College of Food Engineering and Nutritional Science, Shaanxi Normal University, 620 West Changan Avenue, Xian 710119, Shaanxi, P. R. China
| | - Tian Gong
- Engineering Research Center for High-Valued Utilization of Fruit Resources in Western China, Ministry of Education; National Research & Development Center of Apple Processing Technology; College of Food Engineering and Nutritional Science, Shaanxi Normal University, 620 West Changan Avenue, Xian 710119, Shaanxi, P. R. China
| | - Ching Yuan Hu
- Engineering Research Center for High-Valued Utilization of Fruit Resources in Western China, Ministry of Education; National Research & Development Center of Apple Processing Technology; College of Food Engineering and Nutritional Science, Shaanxi Normal University, 620 West Changan Avenue, Xian 710119, Shaanxi, P. R. China
- Department of Human Nutrition, Food and Animal Sciences, College of Tropical Agriculture and Human Resources, University of Hawaii at Manoa, 1955 East-West Road, AgSci. 415J, Honolulu, Hawaii 96822, United States
| | - Yonghong Meng
- Engineering Research Center for High-Valued Utilization of Fruit Resources in Western China, Ministry of Education; National Research & Development Center of Apple Processing Technology; College of Food Engineering and Nutritional Science, Shaanxi Normal University, 620 West Changan Avenue, Xian 710119, Shaanxi, P. R. China
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Dong T, Zhang L, Hao S, Yang J, Peng Y. Interspecies cooperation-driven photogenerated electron transfer processes and efficient multi-pathway nitrogen removal in the g-C 3N 4-anammox consortia biohybrid system. WATER RESEARCH 2024; 255:121532. [PMID: 38564893 DOI: 10.1016/j.watres.2024.121532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Revised: 03/18/2024] [Accepted: 03/26/2024] [Indexed: 04/04/2024]
Abstract
Photocatalytic materials-microbial biohybrid systems pave the way for solar-driven wastewater nitrogen removal. In this study, interspecies cooperation in photogenerated electron transfer and efficient nitrogen removal mechanism in the g-C3N4-anammox consortia biohybrid system were first deciphered. The results indicated that the essential extracellular electron carriers (cytochrome c and flavin) for anammox genomes were provided by associated bacteria (BACT3 and CHLO2). This cooperation, regulated by the ArcAB system and electron transfer flavoprotein, made anammox bacteria the primary photogenerated electron sink. Furthermore, an efficient photogenerated electron harness was used to construct a reductive glycine pathway (rGlyP) in anammox bacteria inventively, which coexisted with the Wood-Ljungdahl pathway (WLP), constituting a dual-pathway carbon fixation model, rGlyP-WLP. Carbon fixation products efficiently contributed to the tricarboxylic acid cycle, while inhibiting electron diversion in anabolism. Photogenerated electrons were targeted channeled into nitrogen metabolism-available electron carriers, enhancing anammox and dissimilatory nitrate reduction to ammonium (DNRA) processes. Moreover, ammonia assimilation by the glycine cleavage system in rGlyP established an alternative ammonia removal route. Ultimately, multi-pathway nitrogen removal involving anammox, DNRA, and rGlyP achieved 100 % ammonia removal and 94.25 % total nitrogen removal efficiency. This study has expanded understanding of anammox metabolic diversity, enhancing its potential application in carbon-neutral wastewater treatment.
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Affiliation(s)
- Tingjun Dong
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing, 100124, China
| | - Li Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing, 100124, China.
| | - Shiwei Hao
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing, 100124, China
| | - Jiachun Yang
- China Coal Technology & Engineering Group Co. Ltd., Tokyo, 100-0011, Japan
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing, 100124, China
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Noda S, Fujiwara R, Mori Y, Dainin M, Shirai T, Kondo A. Styrene Production in Genetically Engineered Escherichia coli in a Two-Phase Culture. BIOTECH 2024; 13:2. [PMID: 38247732 PMCID: PMC10801462 DOI: 10.3390/biotech13010002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 12/13/2023] [Accepted: 01/09/2024] [Indexed: 01/23/2024] Open
Abstract
Styrene is an important industrial chemical. Although several studies have reported microbial styrene production, the amount of styrene produced in batch cultures can be increased. In this study, styrene was produced using genetically engineered Escherichia coli. First, we evaluated five types of phenylalanine ammonia lyases (PALs) from Arabidopsis thaliana (AtPAL) and Brachypodium distachyon (BdPAL) for their ability to produce trans-cinnamic acid (Cin), a styrene precursor. AtPAL2-expressing E. coli produced approximately 700 mg/L of Cin and we found that BdPALs could convert Cin into styrene. To assess styrene production, we constructed an E. coli strain that co-expressed AtPAL2 and ferulic acid decarboxylase from Saccharomyces cerevisiae. After a biphasic culture with oleyl alcohol, styrene production and yield from glucose were 3.1 g/L and 26.7% (mol/mol), respectively, which, to the best of our knowledge, are the highest values obtained in batch cultivation. Thus, this strain can be applied to the large-scale industrial production of styrene.
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Affiliation(s)
- Shuhei Noda
- Graduate School of Science, Technology and Innovation, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan;
- PRESTO, Japan Science and Technology Agency (JST), Kawaguchi 332-0012, Saitama, Japan
| | - Ryosuke Fujiwara
- Center for Sustainable Resource Science, RIKEN, 1-7-22, Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan; (R.F.); (T.S.)
| | - Yutaro Mori
- Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan;
| | - Mayumi Dainin
- Center for Sustainable Resource Science, RIKEN, 1-7-22, Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan; (R.F.); (T.S.)
| | - Tomokazu Shirai
- Center for Sustainable Resource Science, RIKEN, 1-7-22, Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan; (R.F.); (T.S.)
| | - Akihiko Kondo
- Graduate School of Science, Technology and Innovation, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan;
- Center for Sustainable Resource Science, RIKEN, 1-7-22, Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan; (R.F.); (T.S.)
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