Two new aequorin genes,aeqxm and aeqxxm,were isolated from jellyfish Aequorea macrodactyla and Aequorea parva respectively,which are commonly found in the warmer waters on the coastal region of the East China Sea.The ...Two new aequorin genes,aeqxm and aeqxxm,were isolated from jellyfish Aequorea macrodactyla and Aequorea parva respectively,which are commonly found in the warmer waters on the coastal region of the East China Sea.The DNA sequences of the two genes have no introns and each one contains an ORF of 585 bp in full-length encoding a 195-aa protein.The two genes of aeqxm and aeqxxm share nucleotide homologies of 80.7%and 85.1%with AEVAQ440X respectively,and the corresponding proteins share amino acid homologies of 84.7%and 84.2%with AEVAQ440X.High amino acid homology was found between apoaeqxm and apoaeqxxm.The two genes were cloned into expression vector pTO-T7 respectively,and the expression yields amounted to 40%of the total protein in E.coli BL21.The activities of the two photoproteins were reconstituted by incubating the expressed apoproteins with coelenterazine f.In the presence of Ca ion,both of the regenerated aeqxm and aeqxxm exhibited an emission peak at the wave length of 470 nm.展开更多
Chickenpox(varicella) is caused by primary infection with varicella zoster virus(VZV), which can establish long-term latency in the host ganglion. Once reactivated, the virus can cause shingles(zoster) in the host. VZ...Chickenpox(varicella) is caused by primary infection with varicella zoster virus(VZV), which can establish long-term latency in the host ganglion. Once reactivated, the virus can cause shingles(zoster) in the host. VZV has a typical herpesvirus virion structure consisting of an inner DNA core, a capsid, a tegument, and an outer envelope. The tegument is an amorphous layer enclosed between the nucleocapsid and the envelope, which contains a variety of proteins. However, the types and functions of VZV tegument proteins have not yet been completely determined. In this review, we describe the current knowledge on the multiple roles played by VZV tegument proteins during viral infection. Moreover, we discuss the VZV tegument protein-protein interactions and their impact on viral tissue tropism in SCID-hu mice. This will help us develop a better understanding of how the tegument proteins aid viral DNA replication, evasion of host immune response, and pathogenesis.展开更多
Vaccination is one of the most powerful tools to extend the average lifespan of humans.Vaccination has successfully eradicated smallpox and significantly reduced the morbidity and mortality of several infectious disea...Vaccination is one of the most powerful tools to extend the average lifespan of humans.Vaccination has successfully eradicated smallpox and significantly reduced the morbidity and mortality of several infectious diseases,such as poliomyelitis[1].It is currently one of the most effective measures to control infectious diseases[1].The health benefits brought by widespread vaccination are beyond doubt,whether for public health or individuals.展开更多
基金This work was supported in parts by Hi-tech Research and Development Programme of China("863"Programme)under contract No.819-Q-06the National Natural Science Foundation of China under contract No.C01040101 and the Natural Science Foundation of Fujian of China under cotract No.C0010001
文摘Two new aequorin genes,aeqxm and aeqxxm,were isolated from jellyfish Aequorea macrodactyla and Aequorea parva respectively,which are commonly found in the warmer waters on the coastal region of the East China Sea.The DNA sequences of the two genes have no introns and each one contains an ORF of 585 bp in full-length encoding a 195-aa protein.The two genes of aeqxm and aeqxxm share nucleotide homologies of 80.7%and 85.1%with AEVAQ440X respectively,and the corresponding proteins share amino acid homologies of 84.7%and 84.2%with AEVAQ440X.High amino acid homology was found between apoaeqxm and apoaeqxxm.The two genes were cloned into expression vector pTO-T7 respectively,and the expression yields amounted to 40%of the total protein in E.coli BL21.The activities of the two photoproteins were reconstituted by incubating the expressed apoproteins with coelenterazine f.In the presence of Ca ion,both of the regenerated aeqxm and aeqxxm exhibited an emission peak at the wave length of 470 nm.
基金supported by the Fujian Technological Innovation Platform Fund(2014Y2101)the Xiamen City Municipal Platform Fund(3502Z201410045,3502Z20131001)
文摘Chickenpox(varicella) is caused by primary infection with varicella zoster virus(VZV), which can establish long-term latency in the host ganglion. Once reactivated, the virus can cause shingles(zoster) in the host. VZV has a typical herpesvirus virion structure consisting of an inner DNA core, a capsid, a tegument, and an outer envelope. The tegument is an amorphous layer enclosed between the nucleocapsid and the envelope, which contains a variety of proteins. However, the types and functions of VZV tegument proteins have not yet been completely determined. In this review, we describe the current knowledge on the multiple roles played by VZV tegument proteins during viral infection. Moreover, we discuss the VZV tegument protein-protein interactions and their impact on viral tissue tropism in SCID-hu mice. This will help us develop a better understanding of how the tegument proteins aid viral DNA replication, evasion of host immune response, and pathogenesis.
文摘Vaccination is one of the most powerful tools to extend the average lifespan of humans.Vaccination has successfully eradicated smallpox and significantly reduced the morbidity and mortality of several infectious diseases,such as poliomyelitis[1].It is currently one of the most effective measures to control infectious diseases[1].The health benefits brought by widespread vaccination are beyond doubt,whether for public health or individuals.
