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北京中医药大学 中药学院,北京 102488
Received:15 October 2020,
Published Online:11 November 2020,
Published:20 June 2021
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孙一帆,任广喜,李平等.甘草UGDH1基因的克隆、生物信息学及表达分析[J].中国实验方剂学杂志,2021,27(12):133-140.
SUN Yi-fan,REN Guang-xi,LI Ping,et al.Cloning,Bioinformatics and Expression Analysis of UGDH1 Gene in Glycyrrhiza uralensis[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(12):133-140.
孙一帆,任广喜,李平等.甘草UGDH1基因的克隆、生物信息学及表达分析[J].中国实验方剂学杂志,2021,27(12):133-140. DOI: 10.13422/j.cnki.syfjx.20210246.
SUN Yi-fan,REN Guang-xi,LI Ping,et al.Cloning,Bioinformatics and Expression Analysis of UGDH1 Gene in Glycyrrhiza uralensis[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(12):133-140. DOI: 10.13422/j.cnki.syfjx.20210246.
目的
2
对甘草尿苷二磷酸葡萄糖脱氢酶(
UGDH
)基因进行克隆、生物信息学及表达分析。
方法
2
提取6周龄乌拉尔甘草幼苗根、茎、叶的总RNA,通过逆转录-聚合酶链式反应(RT-PCR)克隆
GuUGDH
1基因(Gu表示甘草)互补脱氧核糖核酸(cDNA)序列,测序并进行生物信息学分析,采用实时荧光定量PCR(Real-time PCR)技术进行组织特异性分析。
结果
2
克隆所得
GuUGDH
1基因的开放阅读框(ORF)全长1 443 bp,编码480个氨基酸残基(GenBank登录号MT968993);生物信息学分析显示,GuUGDH1属于稳定的酸性亲水蛋白,相对分子质量53.056 kDa,等电点5.89,不含信号肽,不含跨膜螺旋且都在膜外;含有3个典型的保守结构域,属于尿苷二磷酸(UDP)-葡萄糖/鸟苷二磷酸(GDP)-甘露糖脱氢酶家族;系统进化分析表明,
GuUGDH
1基因与豆科植物大豆
Glycine max
,密花豆
Spatholobus suberectus
的亲缘关系较近;Real-time PCR检测结果表明,在6周龄甘草幼苗的根、茎、叶中都能检测到
GuUGDH
1基因的表达,根的表达量显著高于茎和叶。
结论
2
本研究克隆得到了甘草
UGDH
1基因并对其蛋白序列特征进行了系统分析,可为进一步研究UGDH1蛋白的催化功能提供理论依据。
Objective
2
To clone uridine diphosphate (UDP)-glucose dehydrogenase (
UGDH
) gene of
Glycyrrhiza uralensis
and analyze its bioinformatics and expression.
Method
2
Total RNA was extracted from roots, stems, and leaves of 6-week-old seedlings of
G. uralensis
, the complementary deoxyribonucleic acid (cDNA) sequence of
GuUGDH
1 gene (Gu was short for
G. uralensis
) was cloned by reverse transcription polymerase chain reaction (RT-PCR), then sequencing and bioinformatic analysis were performed, and the specificity of the tissue was analyzed by real-time fluorescence quantitative PCR (Real-time PCR).
Result
2
The open reading frame(ORF)of
GuUGDH
1 gene was 1 443 bp in length and encoded 480 amino acid residues (GenBank accession number of MT968993). Bioinformatics analysis showed that GuUGDH1 was a stable acidic hydrophilic protein with a relative molecular weight of 53.056 kDa, an isoelectric point of 5.89, no signal peptide and no transmembrane helix, and all of them were outside the membrane. There were three typical conserved domains, which belonged to the UDP-glucose/guanosine diphosphate (GDP)-mannose dehydrogenase family. Phylogenetic analysis showed that the
GuUGDH
1 gene was closely related to
Glycine max
and
Spatholobus suberectus
. The results of Real-time PCR showed that the expression of
GuUGDH
1 gene could be detected in the roots, stems, and leaves of 6-week-old seedlings of
G. uralensis
, and the expression level in the roots was significantly higher than that in the stems and leaves.
Conclusion
2
In this study, the
UGDH
1 gene of
G. uralensis
was cloned and its protein sequence characteristics were systematically analyzed, which can provide theoretical basis for further research on the catalytic function of UGDH1 protein.
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