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        Identification and characterization of a novel light-induced promoter for recombinant protein production in Pleurotus ostreatus

        Chaomin Yin,Xiuzhi Fan,Kun Ma,Zheya Chen,Defang Shi,Fen Yao,Hong Gao,Aimin Ma 한국미생물학회 2020 The journal of microbiology Vol.58 No.1

        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 responsiveness motifs and MeJA-responsiveness motifs. To determine 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 tumefaciens. PCR and Southern blot analyses confirmed the Plpegfp- 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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