1
|
Wang X, Wu H, Wong KH, Wang Y, Chen B, Feng K. Biotransformation of triterpenoid ganoderic acids from exogenous diterpene dihydrotanshinone I in the cultures of Ganoderma sessile. Microb Cell Fact 2023; 22:139. [PMID: 37507727 PMCID: PMC10375632 DOI: 10.1186/s12934-023-02156-5] [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: 04/12/2023] [Accepted: 07/20/2023] [Indexed: 07/30/2023] Open
Abstract
BACKGROUND Triterpenoids have shown a wide range of biological activities including antitumor and antiviral effects. Typically, triterpenes are synthesized through the mevalonate pathway and are extracted from natural plants and fungi. In this work, triterpenoids, ganoderic acids (GAs) were discovered to be produced via biotransformation of a diterpene, 15,16-dihydrotanshinone I (DHT) in the liquid cultured Ganoderma sessile mycelium. RESULTS Firstly, the biotransformation products, two rare GAs were isolated and purified by column chromatography, and characterized using HR-ESI-MS spectrometry and NMR spectrometry. The two compounds were Lanosta-7,9(11),24-trien-15α,22,β-diacetoxy-3β-hydroxy-26-oic acid (LTHA) and Lanosta-7,9(11),24-trien-15α,22,β-diacetoxy-3β-carbonyl-26-oic acid (LTCA). Then, transcriptome and proteome technologies were employed to measure the expression of mRNA and protein, which further confirmed that triterpenoid GAs could be transformed from exogenous diterpenoid DHT. At the molecular level, we proposed a hypothesis of the mechanism by which DHT converted to GAs in G. sessile mycelium, and the possible genes involved in biotransformation were verified by RT-qPCR. CONCLUSIONS Two rare GAs were obtained and characterized. A biosynthetic pathway of GAs from DHT was proposed. Although the synthetic route was not confirmed, this study provided important insights into omics resources and candidate genes for studying the biotransformation of diterpenes into triterpenes.
Collapse
Affiliation(s)
- Xinwei Wang
- School of Bioengineering, Zunyi Medical University, Jinwan Road No. 368, Zhuhai, 519090, Guangdong, China
| | - Haibo Wu
- School of Bioengineering, Zunyi Medical University, Jinwan Road No. 368, Zhuhai, 519090, Guangdong, China
| | - Ka Hong Wong
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, 999078, China
| | - Yixuan Wang
- School of Bioengineering, Zunyi Medical University, Jinwan Road No. 368, Zhuhai, 519090, Guangdong, China
| | - Baixiong Chen
- School of Bioengineering, Zunyi Medical University, Jinwan Road No. 368, Zhuhai, 519090, Guangdong, China
| | - Kun Feng
- School of Bioengineering, Zunyi Medical University, Jinwan Road No. 368, Zhuhai, 519090, Guangdong, China.
| |
Collapse
|
2
|
Li B, Liu L, Zhang D, Guo S. Hallmarks of Comparative Transcriptome between Rhizomorphs and Hyphae of Armillaria sp. 541 Participating in Fungal Symbiosis with Emphasis on LysM Domains. Microorganisms 2023; 11:1914. [PMID: 37630474 PMCID: PMC10458900 DOI: 10.3390/microorganisms11081914] [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: 06/14/2023] [Revised: 07/04/2023] [Accepted: 07/05/2023] [Indexed: 08/27/2023] Open
Abstract
Armillaria sp. 541, a genus of root-infecting fungi, forms a symbiosis with traditional Chinese medicine Gastrodia elata (Orchid) and Polyporus umbellatus via extensive networks of durable rhizomorphs. It is not clear the hallmarks of comparative transcriptome between the rhizomorphs and hyphae of Armillaria sp. 541. In the present study, transcriptomic analysis of Armillaria sp. 541 identified 475 differentially expressed genes (DEGs) between Armillaria rhizomorphs (AR) and hyphae (AH). Of them, 285 genes were upregulated and 190 were downregulated. Bioinformatics analyses and tests demonstrated DEGs involved in oxidoreductase activity and peptidoglycan binding were significantly enriched in this process when rhizomorph formed from hyphae. We accordingly obtained 14 gene-encoding proteins containing the LysM domain, and further consensus pattern and phylogenetic analysis indicated that their amino acid sequences were conserved and their biological functions may be peptidoglycan binding for recognition between the fungus and host. Among these genes, one, named Armillaria LysM domain recognition gene (aLDRG), was expressed significantly when rhizomorphs were differentiated from hyphae. It was located in the cortical cells of the rhizomorph by in situ hybridization. Furthermore, biolayer interferometry (BLI) assay demonstrated that aLDRG can bind specifically to chitin oligosaccharide of the fungal cell wall, including N,N',N″-Triacetylchitotriose (CO3) and N,N',N″,N'″,N″″-Pentaacetylchitopentaose (CO5). Therefore, we deduced that Armillaria sp. 541 expressed higher levels of LysM protein aLDRG for better binding of oligosaccharide after rhizomorphs were generated. This study provides functional genes for further studies on the interaction between Armillaria sp. 541 and its host.
Collapse
Affiliation(s)
- Bing Li
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China; (B.L.); (L.L.)
| | - Liu Liu
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China; (B.L.); (L.L.)
| | - Dawei Zhang
- Institute of Bioinformatics and Medical Engineering, School of Electrical and Information Engineering, Jiangsu University of Technology, Changzhou 213001, China
| | - Shunxing Guo
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China; (B.L.); (L.L.)
| |
Collapse
|
3
|
Yu W, Pei R, Zhou J, Zeng B, Tu Y, He B. Molecular regulation of fungal secondary metabolism. World J Microbiol Biotechnol 2023; 39:204. [PMID: 37209190 DOI: 10.1007/s11274-023-03649-6] [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: 04/03/2023] [Accepted: 05/15/2023] [Indexed: 05/22/2023]
Abstract
Many bioactive secondary metabolites synthesized by fungi have important applications in many fields, such as agriculture, food, medical and others. The biosynthesis of secondary metabolites is a complex process involving a variety of enzymes and transcription factors, which are regulated at different levels. In this review, we describe our current understanding on molecular regulation of fungal secondary metabolite biosynthesis, such as environmental signal regulation, transcriptional regulation and epigenetic regulation. The effects of transcription factors on the secondary metabolites produced by fungi were mainly introduced. It was also discussed that new secondary metabolites could be found in fungi and the production of secondary metabolites could be improved. We also highlight the importance of understanding the molecular regulation mechanisms to activate silent secondary metabolites and uncover their physiological and ecological functions. By comprehensively understanding the regulatory mechanisms involved in secondary metabolite biosynthesis, we can develop strategies to improve the production of these compounds and maximize their potential benefits.
Collapse
Affiliation(s)
- Wenbin Yu
- Jiangxi Key Laboratory of Bioprocess Engineering, College of Life Sciences, Jiangxi Science & Technology Normal University, Nanchang, 330013, Jiangxi, China
| | - Rongqiang Pei
- Jiangxi Key Laboratory of Bioprocess Engineering, College of Life Sciences, Jiangxi Science & Technology Normal University, Nanchang, 330013, Jiangxi, China
| | - Jingyi Zhou
- Zhanjiang Preschool Education College, Zhanjiang, 524084, Guangdong, China
| | - Bin Zeng
- Jiangxi Key Laboratory of Bioprocess Engineering, College of Life Sciences, Jiangxi Science & Technology Normal University, Nanchang, 330013, Jiangxi, China
- College of Pharmacy, Shenzhen Technology University, Shenzhen, 518000, Guangdong, China
| | - Yayi Tu
- Jiangxi Key Laboratory of Bioprocess Engineering, College of Life Sciences, Jiangxi Science & Technology Normal University, Nanchang, 330013, Jiangxi, China.
| | - Bin He
- Jiangxi Key Laboratory of Bioprocess Engineering, College of Life Sciences, Jiangxi Science & Technology Normal University, Nanchang, 330013, Jiangxi, China.
| |
Collapse
|
4
|
Li N, Li J, Chen Y, Shen Y, Wei D, Wang W. Mechanism of Zn 2+ regulation of cellulase production in Trichoderma reesei Rut-C30. BIOTECHNOLOGY FOR BIOFUELS AND BIOPRODUCTS 2023; 16:73. [PMID: 37118821 PMCID: PMC10148476 DOI: 10.1186/s13068-023-02323-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 04/18/2023] [Indexed: 04/30/2023]
Abstract
BACKGROUND Trichoderma reesei Rut-C30 is a hypercellulolytic mutant strain that degrades abundant sources of lignocellulosic plant biomass, yielding renewable biofuels. Although Zn2+ is an activator of enzymes in almost all organisms, its effects on cellulase activity in T. reesei have yet to be reported. RESULTS Although high concentrations of Zn2+ severely suppressed the extension of T. reesei mycelia, the application of 1-4 mM Zn2+ enhanced cellulase and xylanase production in the high-yielding cellulase-producing Rut-C30 strain of T. reesei. Expression of the major cellulase, xylanase, and two essential transcription activator genes (xyr1 and ace3) increased in response to Zn2+ stimulation. Transcriptome analysis revealed that the mRNA levels of plc-e encoding phospholipase C, which is involved in the calcium signaling pathway, were enhanced by Zn2+ application. The disruption of plc-e abolished the cellulase-positive influence of Zn2+ in the early phase of induction, indicating that plc-e is involved in Zn2+-induced cellulase production. Furthermore, treatment with LaCl3 (a plasma membrane Ca2+ channel blocker) and deletion of crz1 (calcineurin-responsive zinc finger transcription factor 1) indicated that calcium signaling is partially involved in this process. Moreover, we identified the zinc-responsive transcription factor zafA, the transcriptional levels of which declined in response to Zn2+ stress. Deletion of zafA indicates that this factor plays a prominent role in mediating the Zn2+-induced excessive production of cellulase. CONCLUSIONS For the first time, we have demonstrated that Zn2+ is toxic to T. reesei, although promotes a marked increase in cellulase production. This positive influence of Zn2+ is facilitated by the plc-e gene and zafA transcription factor. These findings provide insights into the role of Zn2+ in T. reesei and the mechanisms underlying signal transduction in cellulase synthesis.
Collapse
Affiliation(s)
- Ni Li
- The State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, P. O. Box 311, Shanghai, 200237, China
| | - Jing Li
- The State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, P. O. Box 311, Shanghai, 200237, China
| | - Yumeng Chen
- The State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, P. O. Box 311, Shanghai, 200237, China
| | - Yaling Shen
- The State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, P. O. Box 311, Shanghai, 200237, China
| | - Dongzhi Wei
- The State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, P. O. Box 311, Shanghai, 200237, China
| | - Wei Wang
- The State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, P. O. Box 311, Shanghai, 200237, China.
| |
Collapse
|
5
|
Wang Q, Qi P, Zhao C, Zhang Y, Wang L, Yu H. Tandem expression of Ganoderma sinense sesquiterpene synthase and IDI promotes the production of gleenol in E. coli. Appl Microbiol Biotechnol 2022; 106:7779-7791. [DOI: 10.1007/s00253-022-12248-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 10/10/2022] [Accepted: 10/15/2022] [Indexed: 11/10/2022]
|
6
|
MtTRC-1, a Novel Transcription Factor, Regulates Cellulase Production via Directly Modulating the Genes Expression of the Mthac-1 and Mtcbh-1 in Myceliophthora thermophila. Appl Environ Microbiol 2022; 88:e0126322. [PMID: 36165620 PMCID: PMC9552611 DOI: 10.1128/aem.01263-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
The thermophilic fungus Myceliophthora thermophila has been used to produce industrial enzymes and biobased chemicals. In saprotrophic fungi, the mechanisms regulating cellulase production have been studied, which revealed the involvement of multiple transcription factors. However, in M. thermophila, the transcription factors influencing cellulase gene expression and secretion remain largely unknown. In this study, we identified and characterized a novel cellulase regulator (MtTRC-1) in M. thermophila through a combination of functional genomics and genetic analyses. Deletion of Mttrc-1 resulted in significantly decreased cellulase production and activities. Transcriptome analysis revealed downregulation of not only the encoding genes of main cellulases but also the transcriptional regulator MtHAC-1 of UPR pathway after disruption of MtTRC-1 under cellulolytic induction conditions. Herein, we also characterized the ortholog of the yeast HAC1p in M. thermophila. We show that Mthac-1 mRNA undergoes an endoplasmic reticulum (ER) stress-induced splicing by removing a 23-nucleotide (nt) intron. Notably, the protein secretion on cellulose was dramatically impaired by the deletion of MtHAC-1. Moreover, the colonial growth on various carbon sources was defective in the absence of MtHAC-1. Electrophoretic mobility shift assays and chromatin immunoprecipitation assays verified MtTRC-1 regulates the transcription of Mthac-1 and the major cellulase gene Mtcbh-1 by binding directly to the promoters in vitro and in vivo. Furthermore, DNase I footprinting assays identified the putative consensus binding site (5′-GNG/C-3′). These results revealed the importance of MtTRC-1 for positively regulating cellulase production. This finding has clarified the complex regulatory pathways involved in cellulolytic enzyme production. IMPORTANCE In the present study, we characterized a novel regulator MtTRC-1 in M. thermophila, which regulated cellulase production through direct transcriptional regulation of the Mthac-1 and Mtcbh-1 genes. Our data demonstrated that MtHAC-1 is a key factor for the cellulase secretion capacity of M. thermophila. Our data indicate that this thermophilic fungus regulates cellulase production through a multilevels network, in which the protein secretory pathway is modulated by MtHAC-1-dependent UPR pathway and the cellulase gene expression is directly regulated in parallel by transcription factors. The conservation of Mttrc1 in filamentous fungi suggests this mechanism may be exploited to engineer filamentous fungal cell factories capable of producing proteins on an industrial scale.
Collapse
|
7
|
Li N, Zeng Y, Chen Y, Shen Y, Wang W. Induction of cellulase production by Sr 2+ in Trichoderma reesei via calcium signaling transduction. BIORESOUR BIOPROCESS 2022; 9:96. [PMID: 38647894 PMCID: PMC10992071 DOI: 10.1186/s40643-022-00587-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Accepted: 08/28/2022] [Indexed: 11/10/2022] Open
Abstract
Trichoderma reesei RUT-C30 is a well-known high-yielding cellulase-producing fungal strain that converts lignocellulose into cellulosic sugar for resource regeneration. Calcium is a ubiquitous secondary messenger that regulates growth and cellulase production in T. reesei. We serendipitously found that adding Sr2+ to the medium significantly increased cellulase activity in the T. reesei RUT-C30 strain and upregulated the expression of cellulase-related genes. Further studies showed that Sr2+ supplementation increased the cytosolic calcium concentration and activated the calcium-responsive signal transduction pathway of Ca2+-calcineurin-responsive zinc finger transcription factor 1 (CRZ1). Using the plasma membrane Ca2+ channel blocker, LaCl3, we demonstrated that Sr2+ induces cellulase production via the calcium signaling pathway. Supplementation with the corresponding concentrations of Sr2+ also inhibited colony growth. Sr2+ supplementation led to an increase in intracellular reactive oxygen species (ROS) and upregulated the transcriptional levels of intracellular superoxide dismutase (sod1) and catalase (cat1). We further demonstrated that ROS content was detrimental to cellulase production, which was alleviated by the ROS scavenger N-acetyl cysteine (NAC). This study demonstrated for the first time that Sr2+ supplementation stimulates cellulase production and upregulates cellulase genes via the calcium signaling transduction pathway. Sr2+ leads to an increase in intracellular ROS, which is detrimental to cellulase production and can be alleviated by the ROS scavenger NAC. Our results provide insights into the mechanistic study of cellulase synthesis and the discovery of novel inducers of cellulase.
Collapse
Affiliation(s)
- Ni Li
- The State Key Laboratory of Bioreactor Engineering, New World Institute of Biotechnology, East China University of Science and Technology, Shanghai, 200237, China
| | - Yi Zeng
- The State Key Laboratory of Bioreactor Engineering, New World Institute of Biotechnology, East China University of Science and Technology, Shanghai, 200237, China
| | - Yumeng Chen
- The State Key Laboratory of Bioreactor Engineering, New World Institute of Biotechnology, East China University of Science and Technology, Shanghai, 200237, China
| | - Yaling Shen
- The State Key Laboratory of Bioreactor Engineering, New World Institute of Biotechnology, East China University of Science and Technology, Shanghai, 200237, China
| | - Wei Wang
- The State Key Laboratory of Bioreactor Engineering, New World Institute of Biotechnology, East China University of Science and Technology, Shanghai, 200237, China.
| |
Collapse
|
8
|
Pérez-Sánchez A, Bibián ME, Barrios-González J. The Biosynthesis of Penicillin and Cephalosporin C are Regulated by ROS at Transcriptional Level. Curr Microbiol 2022; 79:243. [PMID: 35796838 DOI: 10.1007/s00284-022-02935-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Accepted: 06/14/2022] [Indexed: 11/30/2022]
Abstract
In a recent work we showed that, besides lovastatin, ROS also accumulate during the production phase in Pencillium chrysogenum and in Acremonium chrysogenum, and that these ROS regulate the biosynthesis of penicillin and cephalosporin C. In the present study, we investigated the level at which this positive regulation is exerted. Internal ROS levels were manipulated, i.e., increased or decreased, in the production phase of the respective fermentations. Penicillin production decreased by 51.2% when internal ROS concentration was diminished by 50%, while a 62% production increase was observed when ROS were increased (62%). Similarly, Cephalosporin production decreased (35%) with antioxidants and increased (54.1%) with exogenous ROS. Expression analysis of the respective pcbAB genes, encoding the non-ribosomal peptide synthetase enzymes, was performed. Results showed down regulation of these genes in fermentations with lower ROS content, and upregulation in the cultures with higher ROS content, in both species. This showed that ROS regulation of penicillin in P. chrysogenum and of cephalosporin C in A. chrysogenum, is exerted at transcriptional level. In silico analysis of the pcbAB gene promoters in both species, suggested that this regulation could be mediated by stress-response transcription factors like Yap1, SrrA and/or MsnA, and/or by the Hap complex.
Collapse
Affiliation(s)
- A Pérez-Sánchez
- Departamento de Biotecnología, Universidad Autónoma Metropolitana-Iztapalapa, Av. Rafael Atlixco No. 186. Col. Vicentina, Iztapalapa, C.P. 09340, Mexico City, Mexico
| | - M E Bibián
- Departamento de Biotecnología, Universidad Autónoma Metropolitana-Iztapalapa, Av. Rafael Atlixco No. 186. Col. Vicentina, Iztapalapa, C.P. 09340, Mexico City, Mexico
| | - J Barrios-González
- Departamento de Biotecnología, Universidad Autónoma Metropolitana-Iztapalapa, Av. Rafael Atlixco No. 186. Col. Vicentina, Iztapalapa, C.P. 09340, Mexico City, Mexico.
| |
Collapse
|
9
|
Tao N, Cheng B, Chai H, Cui X, Ma Y, Yan J, Zhao Y, Chen W. A Putative Guanosine Triphosphate Cyclohydrolase I Named CaGCH1 Is Involved in Hyphal Branching and Fruiting Development in Cyclocybe aegerita. Front Microbiol 2022; 13:870658. [PMID: 35535251 PMCID: PMC9076582 DOI: 10.3389/fmicb.2022.870658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 03/15/2022] [Indexed: 11/13/2022] Open
Abstract
Guanosine triphosphate (GTP) cyclohydrolase I (GCH1) is the limiting enzyme of the tetrahydrobiopterin (BH4) synthesis pathway. The disruption of gch1 gene may cause conditional lethality due to folic acid auxotrophy in microorganisms, although the function of gch1 in basidiomycetes has not been deciphered so far. In the present study, gch1 expression in Cyclocybe aegerita (cagch1) was downregulated using the RNAi method, which resulted in growth retardation in both solid and liquid medium, with the hyphal tips exhibiting increased branching compared to that in the wild strain. The development of fruiting bodies in the mutant strains was significantly blocked, and there were short and bottle-shaped stipes. The transcriptional profile revealed that the genes of the MAPK pathway may be involved in the regulation of these effects caused by cagch1 knockdown, which provided an opportunity to study the role of gch1 in the development process of basidiomycetes.
Collapse
Affiliation(s)
- Nan Tao
- Biotechnology and Germplasm Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, China.,Yunnan Provincial Key Lab of Agricultural Biotechnology, Kunming, China.,Key Lab of Southwestern Crop Gene Resources and Germplasm Innovation, Ministry of Agriculture, Kunming, China
| | - Bopu Cheng
- Biotechnology and Germplasm Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, China.,College of Life Sciences, Southwest Forestry University, Kunming, China
| | - Hongmei Chai
- Biotechnology and Germplasm Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, China.,Yunnan Provincial Key Lab of Agricultural Biotechnology, Kunming, China.,Key Lab of Southwestern Crop Gene Resources and Germplasm Innovation, Ministry of Agriculture, Kunming, China
| | - Xianghua Cui
- Biotechnology and Germplasm Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, China.,Yunnan Provincial Key Lab of Agricultural Biotechnology, Kunming, China.,Key Lab of Southwestern Crop Gene Resources and Germplasm Innovation, Ministry of Agriculture, Kunming, China
| | - Yuanhao Ma
- Biotechnology and Germplasm Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, China.,Yunnan Provincial Key Lab of Agricultural Biotechnology, Kunming, China.,Key Lab of Southwestern Crop Gene Resources and Germplasm Innovation, Ministry of Agriculture, Kunming, China
| | - Jinping Yan
- Life Science and Technology College, Kunming University of Science and Technology, Kunming, China
| | - Yongchang Zhao
- Biotechnology and Germplasm Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, China.,Yunnan Provincial Key Lab of Agricultural Biotechnology, Kunming, China.,Key Lab of Southwestern Crop Gene Resources and Germplasm Innovation, Ministry of Agriculture, Kunming, China
| | - Weimin Chen
- Biotechnology and Germplasm Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, China.,Yunnan Provincial Key Lab of Agricultural Biotechnology, Kunming, China.,Key Lab of Southwestern Crop Gene Resources and Germplasm Innovation, Ministry of Agriculture, Kunming, China
| |
Collapse
|
10
|
Chen M, Shen Y, Lin L, Wei W, Wei D. Mn2+ modulates the production of mMycophenolic aAcid in Penicillium brevicompactum NRRL864 via rReactive oOxygen sSpecies signaling and the investigation of pb-pho. Fungal Biol 2022; 126:461-470. [DOI: 10.1016/j.funbio.2022.04.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 04/18/2022] [Accepted: 04/22/2022] [Indexed: 11/25/2022]
|
11
|
Han X, Shangguan J, Wang Z, Li Y, Fan J, Ren A, Zhao M. Spermidine Regulates Mitochondrial Function by Enhancing eIF5A Hypusination and Contributes to Reactive Oxygen Species Production and Ganoderic Acid Biosynthesis in Ganoderma lucidum. Appl Environ Microbiol 2022; 88:e0203721. [PMID: 35108082 PMCID: PMC8939328 DOI: 10.1128/aem.02037-21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 01/24/2022] [Indexed: 11/20/2022] Open
Abstract
Spermidine, a kind of polycation and one important member of the polyamine family, is essential for survival in many kinds of organisms and participates in the regulation of cell growth and metabolism. To explore the mechanism by which spermidine regulates ganoderic acid (GA) biosynthesis in Ganoderma lucidum, the effects of spermidine on GA and reactive oxygen species (ROS) contents were examined. Our data suggested that spermidine promoted the production of mitochondrial ROS and positively regulated GA biosynthesis. Further research revealed that spermidine promoted the translation of mitochondrial complexes I and II and subsequently influenced their activity. With a reduction in eukaryotic translation initiation factor 5A (eIF5A) hypusination by over 50% in spermidine synthase gene (spds) knockdown strains, the activities of mitochondrial complexes I and II were reduced by nearly 60% and 80%, respectively, and the protein contents were reduced by over 50%, suggesting that the effect of spermidine on mitochondrial complexes I and II was mediated through its influence on eIF5A hypusination. Furthermore, after knocking down eIF5A, the deoxyhypusine synthase gene (dhs), and the deoxyhypusine hydroxylase gene (dohh), the mitochondrial ROS level was reduced by nearly 50%, and the GA content was reduced by over 40%, suggesting that eIF5A hypusination contributed to mitochondrial ROS production and GA biosynthesis. In summary, spermidine maintains mitochondrial ROS homeostasis by regulating the translation and subsequent activity of complexes I and II via eIF5A hypusination and promotes GA biosynthesis via mitochondrial ROS signaling. The present findings provide new insight into the spermidine-mediated biosynthesis of secondary metabolites. IMPORTANCE Spermidine is necessary for organism survival and is involved in the regulation of various biological processes. However, the specific mechanisms underlying the various physiological functions of spermidine are poorly understood, especially in microorganisms. In this study, we found that spermidine hypusinates eIF5A to promote the production of mitochondrial ROS and subsequently regulate secondary metabolism in microorganisms. Our study provides a better understanding of the mechanism by which spermidine regulates mitochondrial function and provides new insight into the spermidine-mediated biosynthesis of secondary metabolites.
Collapse
Affiliation(s)
- Xiaofei Han
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, Microbiology Department, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Jiaolei Shangguan
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, Microbiology Department, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Zi Wang
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, Microbiology Department, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Yu Li
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, Microbiology Department, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Junpei Fan
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, Microbiology Department, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Ang Ren
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, Microbiology Department, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Mingwen Zhao
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, Microbiology Department, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, China
| |
Collapse
|
12
|
Ahmad MF, Wahab S, Ahmad FA, Ashraf SA, Abullais SS, Saad HH. Ganoderma lucidum: A potential pleiotropic approach of ganoderic acids in health reinforcement and factors influencing their production. FUNGAL BIOL REV 2022. [DOI: 10.1016/j.fbr.2021.12.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
13
|
Chen M, Wang J, Lin L, Xu X, Wei W, Shen Y, Wei D. Synergistic Regulation of Metabolism by Ca 2+/Reactive Oxygen Species in Penicillium brevicompactum Improves Production of Mycophenolic Acid and Investigation of the Ca 2+ Channel. ACS Synth Biol 2022; 11:273-285. [PMID: 34941247 DOI: 10.1021/acssynbio.1c00413] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Although Penicillium brevicompactum is a very important industrial strain for mycophenolic acid production, there are no reports on Ca2+/reactive oxygen species (ROS) synergistic regulation and calcium channels, Cch-pb. This study initially intensified the concentration of the intracellular Ca2+ in the high yielding mycophenolic acid producing strain NRRL864 to explore the physiological role of intracellular redox state in metabolic regulation by Penicillium brevicompactum. The addition of Ca2+ in the media caused an increase of intracellular Ca2+, which was accompanied by a strong increase, 1.5 times, in the higher intracellular ROS concentration. In addition, the more intensive ROS sparked the production of an unreported pigment and increase in mycophenolic acid production. Furthermore, the Ca2+ channel, the homologous gene of Cch1, Cch-pb, was investigated to verify the relationship between Ca2+ and the intracellular ROS. The Vitreoscilla hemoglobin was overexpressed, which was bacterial hemoglobin from Vitreoscilla, reducing the intracellular ROS concentration to verify the relationship between the redox state and the yield of mycophenolic acid. The strain pb-VGB expressed the Vitreoscilla hemoglobin exhibited a lower intracellular ROS concentration, 30% lower, and decreased the yield of mycophenolic acid as 10% lower at the same time. Subsequently, with the NRRL864 fermented under 1.7 and 28 mM Ca2+, the [NADH]/[NAD+] ratios were detected and the higher [NADH]/[NAD+] ratios (4 times higher with 28 mM) meant a more robust primary metabolism which provided more precursors to produce the pigment and the mycophenolic acid. Finally, the 10 times higher calcium addition in the media resulted in 25% enhanced mycophenolic acid production to 6.7 g/L and induced pigment synthesis in NRRL864.
Collapse
Affiliation(s)
- Mianhui Chen
- State Key Laboratory of Bioreactor Engineering, Newworld Institute of Biotechnology, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
| | - Jingjing Wang
- State Key Laboratory of Bioreactor Engineering, Newworld Institute of Biotechnology, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
| | - Lin Lin
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, People’s Republic of China
- Research Laboratory for Functional Nanomaterial, National Engineering Research Center for Nanotechnology, Shanghai 200241, People’s Republic of China
| | - Xiangyang Xu
- Zaozhuang jie nuo enzyme co. ltd, Zaozhuang 277100, People’s Republic of China
| | - Wei Wei
- State Key Laboratory of Bioreactor Engineering, Newworld Institute of Biotechnology, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
| | - Yaling Shen
- State Key Laboratory of Bioreactor Engineering, Newworld Institute of Biotechnology, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
| | - Dongzhi Wei
- State Key Laboratory of Bioreactor Engineering, Newworld Institute of Biotechnology, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
| |
Collapse
|
14
|
Ping Z, Fan H, Wen C, Ji Z, Liang S. GAPDH siRNA Regulates SH-SY5Y Cell Apoptosis Induced by Exogenous α-Synuclein Protein. Neuroscience 2021; 469:91-102. [PMID: 34216695 DOI: 10.1016/j.neuroscience.2021.06.035] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 06/22/2021] [Accepted: 06/30/2021] [Indexed: 11/15/2022]
Abstract
The transport mechanism of intestinal α-synuclein to the central nervous system has become a new hot topic in Parkinson's disease (PD) research. It is worth noting that the glyceraldehyde-3-phosphate dehydrogenase (GAPDH) has been reported to be involved in the pathogenesis of PD. After silencing GAPDH expression by GAPDH siRNA, the normal human intestinal epithelial crypt-like (HIEC) and human SH-SY5Y neuroblastoma cell lines were co-cultured with Escherichia coli cells which were transfected with an α-synuclein overexpression plasmid. The levels of autophagy-related proteins (BECN1, ATG5, LC3A/B and p62) were determined by Western blot analysis. Changes in pro-apoptosis protein levels and flow cytometry analysis were used to assess cell apoptosis and relative intracellular ATP concentration was measured. Oxidative stress was assessed by measuring the levels of reactive oxygen species (ROS) using 2',7'-dichlorofluorescein diacetate (DCFH-DA), thiobarbituric acid-reactive substances (TBARS), and antioxidant capacity was assessed by measuring the glutathione (GSH) levels and superoxide dismutase (SOD) activity. The silencing of the expression of GAPDH pre-knockdown was found to reduce the intracellular levels of ROS and lipid peroxidation, enhance autophagy activity, thereby reducing the cell injury, apoptosis and necrosis induced by exogenous α-synuclein protein in SH-SY5Y cells. This study identifies a new therapeutic target of exogenous α-synuclein protein induced SH-SY5Y cell injury and improves our understanding of the pathophysiological role of GAPDH in vitro.
Collapse
Affiliation(s)
- Zhang Ping
- Department of Neurology, Jiangxi Provincial People's Hospital Affiliated to Nanchang University, Nanchang 330006, Jiangxi, China; Department of Cardiology, Jiangxi Provincial People's Hospital Affiliated to Nanchang University, Nanchang 330006, Jiangxi, China
| | - Hu Fan
- Department of Neurology, Jiangxi Provincial People's Hospital Affiliated to Nanchang University, Nanchang 330006, Jiangxi, China; Department of Cardiology, Jiangxi Provincial People's Hospital Affiliated to Nanchang University, Nanchang 330006, Jiangxi, China
| | - Chai Wen
- Department of Neurology, Jiangxi Provincial People's Hospital Affiliated to Nanchang University, Nanchang 330006, Jiangxi, China; Department of Cardiology, Jiangxi Provincial People's Hospital Affiliated to Nanchang University, Nanchang 330006, Jiangxi, China
| | - Zhang Ji
- Department of Neurology, Jiangxi Provincial People's Hospital Affiliated to Nanchang University, Nanchang 330006, Jiangxi, China; Department of Cardiology, Jiangxi Provincial People's Hospital Affiliated to Nanchang University, Nanchang 330006, Jiangxi, China
| | - Shao Liang
- Department of Neurology, Jiangxi Provincial People's Hospital Affiliated to Nanchang University, Nanchang 330006, Jiangxi, China; Department of Cardiology, Jiangxi Provincial People's Hospital Affiliated to Nanchang University, Nanchang 330006, Jiangxi, China; The people's Hospital of Yu Du County, Jiangxi, China.
| |
Collapse
|
15
|
Chen Y, Fan X, Zhao X, Shen Y, Xu X, Wei L, Wang W, Wei D. cAMP activates calcium signalling via phospholipase C to regulate cellulase production in the filamentous fungus Trichoderma reesei. BIOTECHNOLOGY FOR BIOFUELS 2021; 14:62. [PMID: 33685506 PMCID: PMC7941909 DOI: 10.1186/s13068-021-01914-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Accepted: 02/21/2021] [Indexed: 05/15/2023]
Abstract
BACKGROUND The filamentous fungus Trichoderma reesei is one of the best producers of cellulase and has been widely studied for the production of cellulosic ethanol and bio-based products. We previously reported that Mn2+ and N,N-dimethylformamide (DMF) can stimulate cellulase overexpression via Ca2+ bursts and calcium signalling in T. reesei under cellulase-inducing conditions. To further understand the regulatory networks involved in cellulase overexpression in T. reesei, we characterised the Mn2+/DMF-induced calcium signalling pathway involved in the stimulation of cellulase overexpression. RESULTS We found that Mn2+/DMF stimulation significantly increased the intracellular levels of cAMP in an adenylate cyclase (ACY1)-dependent manner. Deletion of acy1 confirmed that cAMP is crucial for the Mn2+/DMF-stimulated cellulase overexpression in T. reesei. We further revealed that cAMP elevation induces a cytosolic Ca2+ burst, thereby initiating the Ca2+ signal transduction pathway in T. reesei, and that cAMP signalling causes the Ca2+ signalling pathway to regulate cellulase production in T. reesei. Furthermore, using a phospholipase C encoding gene plc-e deletion strain, we showed that the plc-e gene is vital for cellulase overexpression in response to stimulation by both Mn2+ and DMF, and that cAMP induces a Ca2+ burst through PLC-E. CONCLUSIONS The findings of this study reveal the presence of a signal transduction pathway in which Mn2+/DMF stimulation produces cAMP. Increase in the levels of cAMP activates the calcium signalling pathway via phospholipase C to regulate cellulase overexpression under cellulase-inducing conditions. These findings provide insights into the molecular mechanism of the cAMP-PLC-calcium signalling pathway underlying cellulase expression in T. reesei and highlight the potential applications of signal transduction in the regulation of gene expression in fungi.
Collapse
Affiliation(s)
- Yumeng Chen
- State Key Lab of Bioreactor Engineering, New World Institute of Biotechnology, East China University of Science and Technology, 130 Meilong Road , P.O.B. 311, Shanghai, 200237, China
| | - Xingjia Fan
- State Key Lab of Bioreactor Engineering, New World Institute of Biotechnology, East China University of Science and Technology, 130 Meilong Road , P.O.B. 311, Shanghai, 200237, China
| | - Xinqing Zhao
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Yaling Shen
- State Key Lab of Bioreactor Engineering, New World Institute of Biotechnology, East China University of Science and Technology, 130 Meilong Road , P.O.B. 311, Shanghai, 200237, China
| | - Xiangyang Xu
- Zaozhuang Jie Nuo Enzyme Co. Ltd., Shandong, China
| | - Liujing Wei
- State Key Lab of Bioreactor Engineering, New World Institute of Biotechnology, East China University of Science and Technology, 130 Meilong Road , P.O.B. 311, Shanghai, 200237, China
| | - Wei Wang
- State Key Lab of Bioreactor Engineering, New World Institute of Biotechnology, East China University of Science and Technology, 130 Meilong Road , P.O.B. 311, Shanghai, 200237, China.
| | - Dongzhi Wei
- State Key Lab of Bioreactor Engineering, New World Institute of Biotechnology, East China University of Science and Technology, 130 Meilong Road , P.O.B. 311, Shanghai, 200237, China
| |
Collapse
|
16
|
Hydrogen peroxide and salinity stress act synergistically to enhance lipids production in microalga by regulating reactive oxygen species and calcium. ALGAL RES 2021. [DOI: 10.1016/j.algal.2020.102017] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
17
|
Wang T, Wang Y, Chen C, Ren A, Yu H, Zhao M. Effect of the heme oxygenase gene on mycelial growth and polysaccharide synthesis in Ganoderma lucidum. J Basic Microbiol 2021; 61:253-264. [PMID: 33543807 DOI: 10.1002/jobm.202000622] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 12/23/2020] [Accepted: 01/24/2021] [Indexed: 11/06/2022]
Abstract
The heme oxygenase gene has antioxidant and cytoprotective effects in organisms, but no related research has been conducted in Ganoderma lucidum. For the first time, we cloned the HMX1 gene in G. lucidum. The CDS is 1092 bp in length and encodes 363 amino acids. The HMX1 protein was prokaryotically expressed and purified, and the enzyme activity of the purified protein was measured. The value of Km was 0.699 μM, and Vm was 81.9 nmol BV h-1 nmol-1 protein. By constructing the silencing vector pAN7-dual-HMX1i, the transformants HMX1i1 and HMX1i2 were obtained. Compared with the wild-type (WT), the average growth rate of HMX1i1 and HMX1i2 decreased by 31% and 23%, respectively, and the mycelium biomass decreased by 53% and 48%, respectively. Compared with the WT, the extracellular polysaccharide content of HMX1i1 and HMX1i2 increased by 59% and 51%, and the intracellular polysaccharide content increased by 24% and 22%, respectively. These results indicate that the HMX1 gene affects mycelial growth and polysaccharide synthesis in G. lucidum.
Collapse
Affiliation(s)
- Ting Wang
- Microbiology Department, College of Life Sciences, Nanjing Agricultural University, Key Laboratory of Agricultural Environmental MicrobiologM, yinistry of Agriculture, Nanjing, Jiangsu, China
| | - Yihong Wang
- Microbiology Department, College of Life Sciences, Nanjing Agricultural University, Key Laboratory of Agricultural Environmental MicrobiologM, yinistry of Agriculture, Nanjing, Jiangsu, China
| | - Chen Chen
- Microbiology Department, College of Life Sciences, Nanjing Agricultural University, Key Laboratory of Agricultural Environmental MicrobiologM, yinistry of Agriculture, Nanjing, Jiangsu, China
| | - Ang Ren
- Microbiology Department, College of Life Sciences, Nanjing Agricultural University, Key Laboratory of Agricultural Environmental MicrobiologM, yinistry of Agriculture, Nanjing, Jiangsu, China
| | - Hanshou Yu
- Microbiology Department, College of Life Sciences, Nanjing Agricultural University, Key Laboratory of Agricultural Environmental MicrobiologM, yinistry of Agriculture, Nanjing, Jiangsu, China
| | - Mingwen Zhao
- Microbiology Department, College of Life Sciences, Nanjing Agricultural University, Key Laboratory of Agricultural Environmental MicrobiologM, yinistry of Agriculture, Nanjing, Jiangsu, China
| |
Collapse
|
18
|
Meng L, Zhang S, Chen B, Bai X, Li Y, Yang J, Wang W, Li C, Li Y, Li Z. The MADS-box transcription factor GlMADS1 regulates secondary metabolism in Ganoderma lucidum. Mycologia 2020; 113:12-19. [PMID: 33085941 DOI: 10.1080/00275514.2020.1810515] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
MADS-box transcription factors play crucial roles in regulating development processes and biosynthesis of secondary metabolites in eukaryotes. However, the role of MADS-box transcription factors vary among fungal species, and their function remains unclear in the medicinally and economically important fungus Ganoderma lucidum. In this study, we characterized a MADS-box gene, GlMADS1, in G. lucidum. Analyses using quantitative real-time polymerase chain reaction (qRT-PCR) showed that GlMADS1 expression levels were up-regulated from the mycelia to the primordia stage. In order to further evaluate the effect of MADS-box transcription factors on secondary metabolism, we utilized RNA interference (RNAi) to silence GlMADS1 in G. lucidum. Ganoderic acid (GA) and flavonoid contents were enhanced in GlMADS1-silenced strains, suggesting that GlMADS1 negatively regulates GA and flavonoid accumulation.
Collapse
Affiliation(s)
- Li Meng
- Engineering Research Center of Edible and Medicinal Fungi, Ministry of Education, Jilin Agricultural University , Changchun 130118, China.,Shandong Provincial Key Laboratory of Agricultural Microbiology, College of Plant Protection, Shandong Agricultural University , Tai'an 271018, China
| | - Shaoyan Zhang
- Shandong Provincial Key Laboratory of Agricultural Microbiology, College of Plant Protection, Shandong Agricultural University , Tai'an 271018, China
| | - Bingzhi Chen
- Mycological Research Center, Fujian Agriculture and Forestry University , Fuzhou 350002, China
| | - Xiaoran Bai
- Shandong Provincial Key Laboratory of Agricultural Microbiology, College of Plant Protection, Shandong Agricultural University , Tai'an 271018, China
| | - Yefan Li
- Shandong Provincial Key Laboratory of Agricultural Microbiology, College of Plant Protection, Shandong Agricultural University , Tai'an 271018, China
| | - Jie Yang
- Shandong Provincial Key Laboratory of Agricultural Microbiology, College of Plant Protection, Shandong Agricultural University , Tai'an 271018, China
| | - Wei Wang
- Shandong Provincial Key Laboratory of Agricultural Microbiology, College of Plant Protection, Shandong Agricultural University , Tai'an 271018, China
| | - Changtian Li
- Engineering Research Center of Edible and Medicinal Fungi, Ministry of Education, Jilin Agricultural University , Changchun 130118, China
| | - Yu Li
- Engineering Research Center of Edible and Medicinal Fungi, Ministry of Education, Jilin Agricultural University , Changchun 130118, China
| | - Zhuang Li
- Shandong Provincial Key Laboratory of Agricultural Microbiology, College of Plant Protection, Shandong Agricultural University , Tai'an 271018, China
| |
Collapse
|
19
|
Wu Z, Zheng R, Liu G, Liu R, Wu S, Sun C. Calcium protects bacteria against cadmium stress via reducing nitric oxide production and increasing iron acquisition. Environ Microbiol 2020; 23:3541-3553. [PMID: 32939902 DOI: 10.1111/1462-2920.15237] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Accepted: 09/14/2020] [Indexed: 11/26/2022]
Abstract
Cadmium (Cd) is a common toxic heavy metal in the environment, and bacteria have evolved different strategies against Cd-toxicity. Here, we found that marine bacterium Bacillus sp. 98 could significantly alleviate Cd-toxicity by recruiting calcium (Ca) for reducing excessive intracellular nitric oxide (NO) and enhancing iron acquisition. To investigate the underlying mechanisms, mass spectrometry-based proteomic analysis was applied to Bacillus sp. 98 after treated with Cd supplemented with or without Ca. Compared with bacterial cells treated with Cd only, the proteomic results showed that the expression level of NO synthase was markedly down-regulated, while the expression levels of NO dioxygenase, which is responsible for converting NO to nitrate, and proteins associated with iron uptake were profoundly enhanced when Ca was supplemented. Consistently, bacterial intracellular NO amount was dramatically increased after Bacillus sp. 98 was treated with Cd, and reversed to a normal level when Ca or iron was supplemented. Notably, Ca also protected bacteria against stresses from other heavy metals including Cu, Cr, Mn, Ni and Zn, and this self-protection strategy was adopted as well in zebrafish, which encourages us to develop Ca-associated products against heavy metals toxicity in the future.
Collapse
Affiliation(s)
- Zuodong Wu
- College of Life Sciences, Qingdao University, Qingdao, China
| | - Rikuan Zheng
- CAS Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.,Centre of Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, China
| | - Ge Liu
- CAS Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.,Centre of Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, China
| | - Rui Liu
- CAS Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.,Centre of Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, China
| | - Shimei Wu
- College of Life Sciences, Qingdao University, Qingdao, China
| | - Chaomin Sun
- CAS Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.,Centre of Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, China
| |
Collapse
|
20
|
Li H, Zhong JJ. Role of calcineurin-responsive transcription factor CRZ1 in ganoderic acid biosynthesis by Ganoderma lucidum. Process Biochem 2020. [DOI: 10.1016/j.procbio.2020.05.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
21
|
Nazir F, Fariduddin Q, Khan TA. Hydrogen peroxide as a signalling molecule in plants and its crosstalk with other plant growth regulators under heavy metal stress. CHEMOSPHERE 2020; 252:126486. [PMID: 32234629 DOI: 10.1016/j.chemosphere.2020.126486] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 02/29/2020] [Accepted: 03/12/2020] [Indexed: 05/03/2023]
Abstract
Hydrogen peroxide (H2O2) acts as a significant regulatory component interrelated with signal transduction in plants. The positive role of H2O2 in plants subjected to myriad of abiotic factors has led us to comprehend that it is not only a free radical, generated as a product of oxidative stress, but also helpful in the maintenance of cellular homeostasis in crop plants. Studies over the last two centuries has indicated that H2O2 is a key molecule which regulate photosynthesis, stomatal movement, pollen growth, fruit and flower development and leaf senescence. Exogenously-sourced H2O2 at nanomolar levels functions as a signalling molecule, facilitates seed germination, chlorophyll content, stomatal opening, and delays senescence, while at elevated levels, it triggers oxidative burst to organic molecules, which could lead to cell death. Furthermore, H2O2 is also known to interplay synergistically or antagonistically with other plant growth regulators such as auxins, gibberellins, cytokinins, abscisic acid, jasmonic acid, ethylene and salicylic acid, nitric oxide and Ca2+ (as signalling molecules), and brassinosteroids (steroidal PGRs) under myriad of environmental stresses and thus, mediate plant growth and development and reactions to abiotic factors. The purpose of this review is to specify accessible knowledge on the role and dynamic mechanisms of H2O2 in mediating growth responses and plant resilience to HM stresses, and its crosstalk with other significant PGRs in controlling various processes. More recently, signal transduction by mitogen activated protein kinases and other transcription factors which attenuate HM stresses in plants have also been dissected.
Collapse
Affiliation(s)
- Faroza Nazir
- Plant Physiology and Biochemistry Section, Department of Botany, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, 202002, India
| | - Qazi Fariduddin
- Plant Physiology and Biochemistry Section, Department of Botany, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, 202002, India.
| | - Tanveer Alam Khan
- Department of Plant Physiology and Cell Biology, Leibniz Institute of Plant Genetics and Crop Plant Research, Corrensstraße 3, D-06466, Gatersleben, Germany
| |
Collapse
|
22
|
Cui J, Yu C, Zhong DB, Zhao Y, Yu X. Melatonin and calcium act synergistically to enhance the coproduction of astaxanthin and lipids in Haematococcus pluvialis under nitrogen deficiency and high light conditions. BIORESOURCE TECHNOLOGY 2020; 305:123069. [PMID: 32114308 DOI: 10.1016/j.biortech.2020.123069] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Revised: 02/18/2020] [Accepted: 02/19/2020] [Indexed: 05/20/2023]
Abstract
This study focused on the influence of integrating melatonin (MT) and calcium (Ca2+) on the simultaneous accumulation of astaxanthin and lipids in Haematococcus pluvialis under abiotic stress conditions. Compared with the control condition, MT induction enhanced astaxanthin and lipid contents by 65.89% and 27.38%, respectively. The highest contents of astaxanthin and lipids under combined exposure to MT and Ca2+ were 3.8% and 49.53%, respectively, which were 1.13- and 1.21-fold higher than those of cells treated with MT alone. The application of MT and Ca2+ also promoted the expression of carotenogenic and lipogenic genes and increased the levels of Ca2+ and γ-aminobutyric acid (GABA) but decreased reactive oxygen species (ROS) levels. Further evidence indicated that the increased cellular Ca2+ could promote astaxanthin biosynthesis under MT induction by regulating carotenogenic gene levels and GABA and ROS signalling. The integrated strategy efficiently improved the coproduction of astaxanthin and lipids in H. pluvialis.
Collapse
Affiliation(s)
- Jing Cui
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China
| | - Chunli Yu
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China
| | - Du-Bo Zhong
- Yunnan Yunce Quality Testing Co., Ltd, Kunming 650217, China
| | - Yongteng Zhao
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China
| | - Xuya Yu
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China.
| |
Collapse
|
23
|
Penicillin and cephalosporin biosyntheses are also regulated by reactive oxygen species. Appl Microbiol Biotechnol 2020; 104:1773-1783. [PMID: 31900551 DOI: 10.1007/s00253-019-10330-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Revised: 12/10/2019] [Accepted: 12/18/2019] [Indexed: 12/12/2022]
Abstract
In an earlier work on lovastatin production by Aspergillus terreus, we found that reactive oxygen species (ROS) concentration increased to high levels precisely at the start of the production phase (idiophase) and that these levels were sustained during all idiophase. Moreover, it was shown that ROS regulate lovastatin biosynthesis. ROS regulation has also been reported for aflatoxins. It has been suggested that, due to their antioxidant activity, aflatoxins are regulated and synthesized like a second line of defense against oxidative stress. To study the possible ROS regulation of other industrially important secondary metabolites, we analyzed the relationship between ROS and penicillin biosynthesis by Penicillium chrysogenum and cephalosporin biosynthesis by Acremonium chrysogenum. Results revealed a similar ROS accumulation in idiophase in penicillin and cephalosporin fermentations. Moreover, when intracellular ROS concentrations were decreased by the addition of antioxidants to the cultures, penicillin and cephalosporin production were drastically reduced. When intracellular ROS were increased by the addition of exogenous ROS (H2O2) to the cultures, proportional increments in penicillin and cephalosporin biosyntheses were obtained. It was also shown that lovastatin, penicillin, and cephalosporin are not antioxidants. Taken together, our results provide evidence that ROS regulation is a general mechanism controlling secondary metabolism in fungi.
Collapse
|
24
|
Enhanced Ganoderic Acids Accumulation and Transcriptional Responses of Biosynthetic Genes in Ganoderma lucidum Fruiting Bodies by Elicitation Supplementation. Int J Mol Sci 2019; 20:ijms20112830. [PMID: 31185659 PMCID: PMC6600565 DOI: 10.3390/ijms20112830] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 06/06/2019] [Accepted: 06/07/2019] [Indexed: 02/07/2023] Open
Abstract
Ganoderic acids (GAs) are a type of highly oxygenated lanostane-type triterpenoids that are responsible for the pharmacological activities of Ganoderma lucidum. They have been investigated for their biological activities, including antibacterial, antiviral, antitumor, anti-HIV-1, antioxidation, and cholesterol reduction functions. Inducer supplementation is viewed as a promising technology for the production of GAs. This study found that supplementation with sodium acetate (4 mM) significantly increased the GAs content of fruiting bodies by 28.63% compared to the control. In order to explore the mechanism of ganoderic acid accumulation, the transcriptional responses of key GAs biosynthetic genes, including the acetyl coenzyme A synthase gene, and the expression levels of genes involved in calcineurin signaling and acetyl-CoA content have been analyzed. The results showed that the expression of three key GAs biosynthetic genes (hmgs, fps, and sqs) were significantly up-regulated. Analysis indicated that the acetate ion increased the expression of genes related to acetic acid assimilation and increased GAs biosynthesis, thereby resulting in the accumulation of GAs. Further investigation of the expression levels of genes involved in calcineurin signaling revealed that Na+ supplementation and the consequent exchange of Na+/Ca2+ induced GAs biosynthesis. Overall, this study indicates a feasible new approach of utilizing sodium acetate elicitation for the enhanced production of valuable GAs content in G. lucidum, and also provided the primary mechanism of GAs accumulation.
Collapse
|
25
|
Ren A, Shi L, Zhu J, Yu H, Jiang A, Zheng H, Zhao M. Shedding light on the mechanisms underlying the environmental regulation of secondary metabolite ganoderic acid in Ganoderma lucidum using physiological and genetic methods. Fungal Genet Biol 2019; 128:43-48. [PMID: 30951869 DOI: 10.1016/j.fgb.2019.03.009] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 03/13/2019] [Accepted: 03/31/2019] [Indexed: 12/23/2022]
Abstract
The secondary metabolites of fungi are often produced at very low concentrations, and until recently the regulatory mechanisms of secondary metabolite biosynthesis have been unclear. Ganoderma lucidum is a macrofungus that is widely used as a traditional Chinese medicine or medicinal mushroom: ganoderic acid (GA) is one of the main active ingredients. Here, we review research from the last decade on which and how environmental factors regulate GA biosynthesis. These environmental factors are mainly three components: a single chemical/biological or biochemical signal, physical triggers, and nutritional conditions. Because G. lucidum is a non-model Basidiomycete, a combination of physiological and genetic research is needed to determine how those environmental factors regulate GA biosynthesis. The regulation of GA biosynthesis includes ROS, Ca2+, cAMP and phospholipid signaling, and cross-talk between different signaling pathways. The regulatory mechanisms for the synthesis of this secondary metabolite, from the perspective of physiology and genetics, in G. lucidum will provide ideas for studying the regulation of fungal secondary metabolism in other non-model species, especially those fungi with limitations in genetic manipulation.
Collapse
Affiliation(s)
- Ang Ren
- Department of Microbiology, College of Life Sciences, Nanjing Agricultural University, Key Laboratory of Microbiological Engineering of Agricultural Environment, Ministry of Agriculture, Nanjing 210095, Jiangsu, PR China
| | - Liang Shi
- Department of Microbiology, College of Life Sciences, Nanjing Agricultural University, Key Laboratory of Microbiological Engineering of Agricultural Environment, Ministry of Agriculture, Nanjing 210095, Jiangsu, PR China
| | - Jing Zhu
- Department of Microbiology, College of Life Sciences, Nanjing Agricultural University, Key Laboratory of Microbiological Engineering of Agricultural Environment, Ministry of Agriculture, Nanjing 210095, Jiangsu, PR China
| | - Hanshou Yu
- Department of Microbiology, College of Life Sciences, Nanjing Agricultural University, Key Laboratory of Microbiological Engineering of Agricultural Environment, Ministry of Agriculture, Nanjing 210095, Jiangsu, PR China
| | - Ailiang Jiang
- Department of Microbiology, College of Life Sciences, Nanjing Agricultural University, Key Laboratory of Microbiological Engineering of Agricultural Environment, Ministry of Agriculture, Nanjing 210095, Jiangsu, PR China
| | - Huihua Zheng
- Jiangsu Alphay Bio-technology Co., Ltd./Key Laboratory of Edible Mushroom Processing, Ministry of Agriculture, Nantong 226009, Jiangsu, PR China
| | - Mingwen Zhao
- Department of Microbiology, College of Life Sciences, Nanjing Agricultural University, Key Laboratory of Microbiological Engineering of Agricultural Environment, Ministry of Agriculture, Nanjing 210095, Jiangsu, PR China.
| |
Collapse
|