TAO Peng,LIU Ying,TANG Ziwei,et al.Transcriptome-based Screening and Validation of Key Enzyme Genes for Polygonatum Polysaccharide Metabolism[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(12):157-167.
TAO Peng,LIU Ying,TANG Ziwei,et al.Transcriptome-based Screening and Validation of Key Enzyme Genes for Polygonatum Polysaccharide Metabolism[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(12):157-167. DOI: 10.13422/j.cnki.syfjx.20230414.
Transcriptome-based Screening and Validation of Key Enzyme Genes for Polygonatum Polysaccharide Metabolism增强出版
To screen and validate key enzyme genes affecting the polysaccharide content in different
Polygonatum
species and perform in-depth amino acid sequence analysis by transcriptomic analysis of
P. zanlanscianense
,
P. kingianum
, and
P. cyrtonema
rhizomes to enrich the transcriptome data of
Polygonatum
plants and provide references for polysaccharide biosynthesis mechanism and genetic improvement.
Method
2
The
Polygonatum
transcriptome was sequenced and analyzed using the Illumina NovaSeq high-throughput sequencing platform, and the differences in the transcriptomes of the three
Polygonatum
species were compared and according to the annotations of Nr, Gene Ontology (GO), and Kyoto Encyclopedia of Genes and Genomes (KEGG) databases. The key enzymes in the polysaccharide metabolism pathway were screened, and the expression of key enzyme genes was clustered and correlated with the polysaccharide content. Finally, Real-time polymerase chain reaction (Real-time PCR) was performed to validate the eight key enzyme genes, and the key genes of polysaccharide biosynthesis were further screened for homologous gene sequence analysis in combination with sequencing results, followed by constructing phylogenetic trees, predicting motifs, conserved structural domains, protein sequence isoelectric points, and molecular weights, and constructing 3D protein structures by using homology modeling method.
Result
2
The annotation of the Nr database revealed that three
Polygonatum
species had the highest gene homology with
Asparagus officinalis
. GO database annotation results showed that three
Polygonatum
species differed significantly in binding, catalytic activity, metabolic processes, and cellular components, while the KEGG pathway annotation results indicated that three
Polygonatum
species differed significantly in the starch and sucrose metabolic pathway and galactose metabolic pathway. According to clustering analysis, correlation analysis, Real-time PCR, expression profiles, and structural and functional predictions of amino acid sequences, the key enzyme significantly affecting the polysaccharide content in different
Polygonatum
species was inferred to be
β
-fructofuranosidase (sacA).
Conclusion
2
SacA may be the main influencing factor for the difference in polysaccharide content of
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Related Author
QIN Yingying
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CHEN Sha
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CHENG Jintang
XU Qingxia
WANG Guohua
ZHOU Jing
Related Institution
School of Chinese Materia Medica,Chongqing University of Chinese Medicine
School of Basic Science,Shanxi Key Laboratory for Modernization of Traditional Chinese Veterinary Medicine,Shanxi Agricultural University
Institute of Chinese Materia Medica,China Academy of Chinese Medical Sciences
Hunan Traditional Chinese Medicine Piece Standardization and Function Technology Research Center
Key Laboratory of Traditional Chinese Medicine Modernization Research in General Colleges and Universities of Hunan Province