山韭蒜氨酸酶基因(AsALy1)全長cDNA的克隆及表達分析
[Abstract]:Chinese chive is a perennial wild Allium plant of Liliaceae. It is a traditional Chinese medicine. Its effective medicinal ingredients are anti-pathogenic microorganism, anti-oxidation, anti-tumor, lowering blood pressure, lowering blood lipid, lowering blood sugar. Antiplatelet aggregation and liver protection and other physiological functions, and this medicinal ingredient is mainly allicin. Alliin is one of the organic sulfides produced by the reaction of alliinase with alliinic acid. Therefore, cloning and analyzing alliinase gene not only provides a theoretical basis for further study of alliinase, but also provides a theoretical basis for further study of alliinase. In this study, the cDNA sequence of alliinase gene (tentatively named AsALy1) was cloned, expressed and bioinformatics were analyzed. Methods: the conserved regions of AsALy1 gene and actin gene were cloned by RT-PCR. The unknown and ORF sequences of As ALy1 gene were cloned by RACE technique, and the full-length cDNA sequence of AsALy1 gene was obtained by electronic splicing, and the expression of AsALy1 gene in different tissues was analyzed by real-time fluorescence quantitative PCR technique. The amino acid sequence of As ALy1 gene was analyzed by bioinformatics. Results: the length of the conserved region of the cloned AsALy1 gene was 862 bp;. The full-length cDNA; of the AsALy1 gene with the length of 1655 bp was obtained by RACE technique. The analysis of bioinformatics software showed that the open reading frame (ORF) length was 1440 bp, and the relative molecular weight was 54950.82 Da, theoretical isoelectric point was 8.75; It is predicted that the As ALy1 protein has a transmembrane region between the amino acids of 13 and 32, and the secondary structure is mainly composed of 偽 helix, random crimp and 尾 -fold chain. The predicted alliinase has superfamily domain of aspartate aminotransferase, catalytic domain of C-terminal, epidermal growth factor domain and aspartate / methionine / tyrosine transaminase domain. It was predicted that the protein had three phosphorylation sites, serine, threonine and tyrosine, and N-glycosylation sites. The length of the conserved fragment of actin gene was 386 bp;. The results of real-time fluorescence quantitative PCR showed that the expression of AsALy1 gene in stem was 0.7 times, 36 times and 157 times as much as that in flower, leaf and seed, while AsALy1 gene was almost not expressed in root, which indicated that AsALy1 gene was alliinase in bulb.
【學位授予單位】:內(nèi)蒙古師范大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:Q943.2;S567.239
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