Objective:To characterize the Entamoeba histolytica(E.histolytica)antigen(s)recognized by moribound amoebic liver abscess hamsters.Methods:Crude soluble antigen of E.histolytica was probed with sera of moribund hamste...Objective:To characterize the Entamoeba histolytica(E.histolytica)antigen(s)recognized by moribound amoebic liver abscess hamsters.Methods:Crude soluble antigen of E.histolytica was probed with sera of moribund hamsters in 1D-and 2D-Westem blot analyses.The antigenic protein was then sent for tandem mass spectrometry analysis.The corresponding gene was cloned and expressed in Escherichia coli BL21-AI to produce the recombinant E.histolytica ADP-forming acetyl-CoA synthetase(EhACS)protein.A customised ELISA was developed to evaluate the sensitivity and specificity of the recombinant protein.Results:A^75 kDa protein band with a pl value of 5.91-6.5 was found to be antigenic;and not detected by sera of hamsters in the control group.Tandem mass spectrometry analysis revealed the protein to be the 77 kDa E.histolytica ADP-forming acetyl-CoA synthetase(EhACS).The customised ELISA results revealed 100%sensitivity and 100%specificity when tested against infected(n=31)and control group hamsters(n=5)serum samples,respectively.Conclusions:This rinding suggested the significant role of EhACS as a biomarker for moribund hamsters with acute amoebic liver abscess(ALA)infection.It is deemed pertinent that future studies explore the potential roles of EhACS in better understanding the pathogenesis of ALA;and in the development of vaccine and diagnostic tests to control ALA in human populations.展开更多
The entire gene of carboxyltransferase（CT） domain of acetyl-CoA carboxylase（ACCase） from Chinese Spring wheat（CSW） plastid was cloned firstly, and the 2.3 kb gene was inserted into PET28a^＋ vector and expressed...The entire gene of carboxyltransferase（CT） domain of acetyl-CoA carboxylase（ACCase） from Chinese Spring wheat（CSW） plastid was cloned firstly, and the 2.3 kb gene was inserted into PET28a^＋ vector and expressed in E. coil in a soluble state. The （His）6 fusion protein was identified by SDS-PAGE and Western blot. The recombinant protein was purified by affinity chromatography, and the calculated molecular mass（Mr） was 88000. The results of the sequence analysis indicate that the cloned gene（GeneBank accession No. EU124675） was a supplement and revision of the reported ACCase CT partial cDNA from Chinese Spring wheat plastid. The recombinant protein will be significant for us to investigate the recognizing mechanism between ACCase and herbicides, and further to screen new herbicides.展开更多
乙酰CoA羧化酶(acetyl CoA carboxylase,ACC)是脂肪酸合成的限速酶,它催化乙酰CoA合成丙二酰CoA,对 脂肪的合成起着重要的调节作用,它与肥胖的发生及发展关系密切。ACC在体内受多种激素的调节,运动及饮食也 能通过调节ACC的活性来调节...乙酰CoA羧化酶(acetyl CoA carboxylase,ACC)是脂肪酸合成的限速酶,它催化乙酰CoA合成丙二酰CoA,对 脂肪的合成起着重要的调节作用,它与肥胖的发生及发展关系密切。ACC在体内受多种激素的调节,运动及饮食也 能通过调节ACC的活性来调节体内脂代谢过程。展开更多
Lysine acetylation is a reversible posttranslational modifcation, an epigenetic phenomenon, referred to as transfer of an acetyl group from acetyl CoA to lysine ε- amino group of targeted protein, which is modulated ...Lysine acetylation is a reversible posttranslational modifcation, an epigenetic phenomenon, referred to as transfer of an acetyl group from acetyl CoA to lysine ε- amino group of targeted protein, which is modulated by acetyltransferases (histone/ lysine (K) acetyltransferases, HATs/KATs) and deacetylases (histone/lysine (K) deacetylases, HDACs/KDACs). Lysine acetylation regulates various metabolic processes, such as fatty acid oxidation, Krebs cycle, oxidative phosphorylation, angiogenesis and so on. Thus disorders of lysine acetylation may be correlated with obesity, diabetes and cardiovascular disease, which are termed as the metabolic complication. With accumulating studies on proteomic acetylation, lysine acetylation also involves in cell immune status and degenerative diseases, for example, Alzheimer’s disease and Huntington’s disease. This review primarily summarizes the current studies of lysine acetylation in metabolism modulation and in metabolism-related diseases, such as cardiovascular disease and fat metabolism disorder.展开更多
基金Supported by Malaysia Ministry of Education Long-Term Research Grant Scheme(LRGS)No.203/PSK/6722002
文摘Objective:To characterize the Entamoeba histolytica(E.histolytica)antigen(s)recognized by moribound amoebic liver abscess hamsters.Methods:Crude soluble antigen of E.histolytica was probed with sera of moribund hamsters in 1D-and 2D-Westem blot analyses.The antigenic protein was then sent for tandem mass spectrometry analysis.The corresponding gene was cloned and expressed in Escherichia coli BL21-AI to produce the recombinant E.histolytica ADP-forming acetyl-CoA synthetase(EhACS)protein.A customised ELISA was developed to evaluate the sensitivity and specificity of the recombinant protein.Results:A^75 kDa protein band with a pl value of 5.91-6.5 was found to be antigenic;and not detected by sera of hamsters in the control group.Tandem mass spectrometry analysis revealed the protein to be the 77 kDa E.histolytica ADP-forming acetyl-CoA synthetase(EhACS).The customised ELISA results revealed 100%sensitivity and 100%specificity when tested against infected(n=31)and control group hamsters(n=5)serum samples,respectively.Conclusions:This rinding suggested the significant role of EhACS as a biomarker for moribund hamsters with acute amoebic liver abscess(ALA)infection.It is deemed pertinent that future studies explore the potential roles of EhACS in better understanding the pathogenesis of ALA;and in the development of vaccine and diagnostic tests to control ALA in human populations.
基金Supported by the National Natural Science Foundation of China(Nos. 20432010, 20672045 and 30570405)
文摘The entire gene of carboxyltransferase（CT） domain of acetyl-CoA carboxylase（ACCase） from Chinese Spring wheat（CSW） plastid was cloned firstly, and the 2.3 kb gene was inserted into PET28a^＋ vector and expressed in E. coil in a soluble state. The （His）6 fusion protein was identified by SDS-PAGE and Western blot. The recombinant protein was purified by affinity chromatography, and the calculated molecular mass（Mr） was 88000. The results of the sequence analysis indicate that the cloned gene（GeneBank accession No. EU124675） was a supplement and revision of the reported ACCase CT partial cDNA from Chinese Spring wheat plastid. The recombinant protein will be significant for us to investigate the recognizing mechanism between ACCase and herbicides, and further to screen new herbicides.
文摘Lysine acetylation is a reversible posttranslational modifcation, an epigenetic phenomenon, referred to as transfer of an acetyl group from acetyl CoA to lysine ε- amino group of targeted protein, which is modulated by acetyltransferases (histone/ lysine (K) acetyltransferases, HATs/KATs) and deacetylases (histone/lysine (K) deacetylases, HDACs/KDACs). Lysine acetylation regulates various metabolic processes, such as fatty acid oxidation, Krebs cycle, oxidative phosphorylation, angiogenesis and so on. Thus disorders of lysine acetylation may be correlated with obesity, diabetes and cardiovascular disease, which are termed as the metabolic complication. With accumulating studies on proteomic acetylation, lysine acetylation also involves in cell immune status and degenerative diseases, for example, Alzheimer’s disease and Huntington’s disease. This review primarily summarizes the current studies of lysine acetylation in metabolism modulation and in metabolism-related diseases, such as cardiovascular disease and fat metabolism disorder.
