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您的检索式：作者名="Mingdong Si"
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| 1 | Enhanced Poly(ethylene terephthalate)Hydrolase Activity by Protein Engineering显示文摘Poly(ethylene terephthalate)hydrolase(PETase)from Ideonella sakaiensis exhibits a strong ability to degrade poly(ethylene terephthalate)(PET)at room temperature,and is thus regarded as a potential tool to solve the issue of polyester plastic pollution.Therefore,we explored the interaction between PETase and the substrate(a dimer of the PET monomer ethylene terephthalate,2PET),using a model of PETase and its substrate.In this study,we focused on six key residues around the substrate-binding groove in order to create novel high-efficiency PETase mutants through protein engineering.These PETase mutants were designed and tested.The enzymatic activities of the R61A,L88F,and I179F mutants,which were obtained with a rapid cell-free screening system,exhibited 1.4 fold,2.1 fold,and 2.5 fold increases,respectively,in comparison with wild-type PETase.The I179F mutant showed the highest activity,with the degradation rate of a PET film reaching 22.5 mg perμmol·L^-1 PETase per day.Thus,this study has created enhanced artificial PETase enzymes through the rational protein engineering of key hydrophobic sites,and has further illustrated the potential of biodegradable plastics. | Yuan Ma Mingdong Yao Bingzhi Li Mingzhu Ding Bo He Si Chen Xiao Zhou Yingjin Yuan | 2018 | Engineering2018，4，6： | 10 |
| 2 | Exploration of Hanshi Zufei prescription for treatment of COVID-19 based on network pharmacology显示文摘Objective:Network pharmacology combines drug and disease targets with biological information networks based on the integrity and systematicness of the interactions between drugs and disease targets.This study aims to explore the molecular basis of Hanshi Zufei formula for treatment of COVID-19 based on network pharmacology and molecular docking techniques.Methods:Using TCMSP,the chemical constituents and molecular targets of Atractylodis Rhizoma,Citri Reticulatae Pericarpium,Magnoliae Officinalis Cortex,Pogostemonis Herba,Tsaoko Fructus,Ephedrae Herba,Notopterygii Rhizoma et Radix,Zingiberis Rhizoma Recens,and Arecae Semen were investigated.The predicted targets of novel coronavirus were screened using the NCBI and Gene Cards databases.To further screen the drug-disease core targets network,the corresponding target proteins were queried using multiple databases(Biogrid,DIP,and HPRD),a protein interaction network graph was constructed,and the network topology was analyzed.The molecular docking studies were also performed between the network’s top 15 compounds and the coronavirus(SARS-Co V-2)3 CL hydrolytic enzyme and angiotensin conversion enzymeⅡ(ACE2).Results:The herb-active ingredient-target network contained nine drugs,86 compounds,and 49 drugdisease targets.Gene ontology(GO)enrichment analysis resulted in 1566 GO items(P<0.05),among which 1438 were biological process items,35 were cell composition items,and 93 were molecular function items.Fourteen signal pathways were obtained by enrichment screening of the KEGG pathway database(P<0.05).The molecular docking results showed that the affinity of the core active compounds with the SARS-CoV-23 CL hydrolase was better than for the other compounds.Conclusion:Several core compounds can regulate multiple signaling pathways by binding with 3 CL hydrolase and ACE2,which might contribute to the treatment of COVID-19. | Xinrui Li Zishuai Wen Mingdong Si Yuxin Jia Huixian Liu Yuguang Zheng Donglai Ma | 2022 | Chinese Herbal Medicines2022，14，2： | 0 |
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