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Xu H, Nakazawa T, Zhang Y, Oh M, Bao D, Kawauchi M, Sakamoto M, Honda Y. Introducing multiple-gene mutations in Pleurotus ostreatus using a polycistronic tRNA and CRISPR guide RNA strategy. FEMS Microbiol Lett 2022; 369:6776014. [PMID: 36302144 DOI: 10.1093/femsle/fnac102] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 08/26/2022] [Accepted: 10/25/2022] [Indexed: 12/13/2022] Open
Abstract
The white-rot fungus Pleurotus ostreatus is an agaricomycete that is frequently used in molecular genetics studies as many useful tools are applicable to the fungus. In particular, efficient gene targeting using homologous recombination and CRISPR/Cas9 enables the introduction of a mutation in the gene of interest for functional analysis. Multiple genes encoding various lignocellulose-degrading enzymes are predicted to be present in the genome; therefore, analyses of multiple-gene mutants are required to elucidate the mechanisms underlying lignocellulose degradation by P. ostreatus. Conventional tools for generating multiple-gene mutations in P. ostreatus are laborious and time-consuming. Therefore, more efficient and practical methods are needed. In this study, we introduced CRISPR/Cas9-assisted multiple-gene mutations using a polycistronic tRNA and CRISPR guide RNA approach. The frequency (triple-gene mutation in fcy1, vp2, and 62347) was only 3.3% when a tetracistronic tRNA-sgRNA containing four different sgRNAs targeting fcy1, vp2, vp3, or 62347 was expressed. It increased to 20% (triple-gene mutation in vp1, vp2, and vp3) after a tricistronic tRNA-sgRNA was expressed with replaced/modulated promoter and tRNA sequences. This study demonstrated, for the first time, the applicability of a strategy to induce multiple-gene mutations in P. ostreatus in a transformation experiment.
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Affiliation(s)
- Haibo Xu
- Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | - Takehito Nakazawa
- Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | - Yufan Zhang
- Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | - Minji Oh
- Mushroom division, National Institute of Horticultural and Herbal Science, Rural Development Administration, Bisan-ro, Eumseong-gun, Chungcheongbuk-do 22709, Republic of Korea
| | - Dapeng Bao
- Institute of Edible Fungi, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
| | - Moriyuki Kawauchi
- Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | - Masahiro Sakamoto
- Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | - Yoichi Honda
- Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
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Yin C, Fan X, Ma K, Chen Z, Shi D, Yao F, Gao H, Ma A. Identification and characterization of a novel light-induced promoter for recombinant protein production in Pleurotus ostreatus. J Microbiol 2019; 58:39-45. [PMID: 31686390 DOI: 10.1007/s12275-020-9230-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 09/26/2019] [Accepted: 09/29/2019] [Indexed: 11/30/2022]
Abstract
A lectin gene (plectin) with a high level of expression was previously identified by comparative transcriptome analysis of Pleurotus ostreatus. In this study, we cloned a 733-bp DNA fragment from the start codon of the plectin gene. Sequence analysis showed that the plectin promoter (Plp) region contained several eukaryotic transcription factor binding motifs, such as the TATA-box, four possible CAAT-box, light respon-siveness motifs and MeJA-responsiveness motifs. To deter-mine whether the Plp promoter was a light-regulated promoter, we constructed an expression vector with the fused egfp-hph fragment under the control of the Plp promoter and transformed P. ostreatus mycelia via Agrobacterium tunte-faciens. PCR and Southern blot analyses confirmed the Plp-egfp-hph fragment was integrated into the chromosomal DNA of transformants. qRT-PCR, egfp visualization, and intracellular egfp determination experiments showed the Plp promoter could be a light-induced promoter that may be suitable for P. ostreatus genetic engineering. This study lays the foundation for gene homologous expression in P. ostreatus.
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Affiliation(s)
- Chaomin Yin
- Institute of Agro-Products Processing and Nuclear-Agricultural Technology, Hubei Academy of Agricultural Sciences, Wuhan, 430064, P. R. China. .,National Research and Development Center for Edible Fungi Processing (Wuhan), Wuhan, 430064, P. R. China.
| | - Xiuzhi Fan
- Institute of Agro-Products Processing and Nuclear-Agricultural Technology, Hubei Academy of Agricultural Sciences, Wuhan, 430064, P. R. China
| | - Kun Ma
- Institute of Agro-Products Processing and Nuclear-Agricultural Technology, Hubei Academy of Agricultural Sciences, Wuhan, 430064, P. R. China
| | - Zheya Chen
- Institute of Agro-Products Processing and Nuclear-Agricultural Technology, Hubei Academy of Agricultural Sciences, Wuhan, 430064, P. R. China
| | - Defang Shi
- Institute of Agro-Products Processing and Nuclear-Agricultural Technology, Hubei Academy of Agricultural Sciences, Wuhan, 430064, P. R. China
| | - Fen Yao
- Institute of Agro-Products Processing and Nuclear-Agricultural Technology, Hubei Academy of Agricultural Sciences, Wuhan, 430064, P. R. China
| | - Hong Gao
- Institute of Agro-Products Processing and Nuclear-Agricultural Technology, Hubei Academy of Agricultural Sciences, Wuhan, 430064, P. R. China.,National Research and Development Center for Edible Fungi Processing (Wuhan), Wuhan, 430064, P. R. China
| | - Aimin Ma
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan, 430070, P. R. China.
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Martani F, Beltrametti F, Porro D, Branduardi P, Lotti M. The importance of fermentative conditions for the biotechnological production of lignin modifying enzymes from white-rot fungi. FEMS Microbiol Lett 2017; 364:3888816. [DOI: 10.1093/femsle/fnx134] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 06/23/2017] [Indexed: 01/04/2023] Open
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Garrido-Bazán V, Téllez-Téllez M, Herrera-Estrella A, Díaz-Godínez G, Nava-Galicia S, Villalobos-López MÁ, Arroyo-Becerra A, Bibbins-Martínez M. Effect of textile dyes on activity and differential regulation of laccase genes from Pleurotus ostreatus grown in submerged fermentation. AMB Express 2016; 6:93. [PMID: 27718214 PMCID: PMC5055507 DOI: 10.1186/s13568-016-0263-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Accepted: 09/28/2016] [Indexed: 09/01/2023] Open
Abstract
This research was conducted to extend the knowledge on the differential regulation of laccase genes in response to dyes. In order to accomplish this, we analyzed both, the expression of five laccase genes by real time RT-qPCR, and also the laccase activity and isoforms patterns during the time-course of a Pleurotus ostreatus submerged fermentation supplemented with either acetyl yellow G (AYG) or remazol brilliant blue R (RBBR) dyes. For the purpose of obtaining a stable reference gene for optimal normalization of RT-quantitative PCR gene expression assays, we tested four candidate reference genes. As a result of this analysis, gpd was selected as reference index for data normalization. The addition of dyes had an induction effect on the enzymatic activity and also modified the zymogram profile. Fermentation with RBBR showed the highest laccase activity and number of isoforms along the course of the fermentation. Laccase gene expression profiles displayed up/down regulation along the fermentation time in four laccase genes (pox4, pox3, poxa1b and pox2), while pox1 was not expressed in either of the fermentation conditions. AYG addition caused the highest induction and repression levels for genes pox3 and poxa1b respectively. The expression level for all genes in the presence of RBBR were lower than in AYG, being in both conditions this response growth time dependent. These results show the influence of the nature of dyes on the induction level of laccase activity and on the differential regulation of the laccase genes expression in P. ostreatus.
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Effects of calmodulin on expression of lignin-modifying enzymes in Pleurotus ostreatus. Curr Genet 2014; 61:127-40. [DOI: 10.1007/s00294-014-0460-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Revised: 10/26/2014] [Accepted: 10/29/2014] [Indexed: 01/28/2023]
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