PLP City Range项目坐落在曼谷通罗地区一个宁静的高档社区内,是一座为尖端高尔夫模拟中心建造的创新性混合用途建筑。引人注目的建筑立面,采用曲面预制混凝土板正反向拼贴组合而成,兼具美学和功能性。这些造型独特的混凝土模块在自然...PLP City Range项目坐落在曼谷通罗地区一个宁静的高档社区内,是一座为尖端高尔夫模拟中心建造的创新性混合用途建筑。引人注目的建筑立面,采用曲面预制混凝土板正反向拼贴组合而成,兼具美学和功能性。这些造型独特的混凝土模块在自然光下形成光影交织的效果,巧妙地呼应了高尔夫运动挥杆时的优雅弧线,在视觉上呈现这项运动独特的魅力。展开更多
为原核表达副猪嗜血杆菌Plp4蛋白,本研究通过PCR方法扩增Plp4全长基因并克隆于pET-28a(+)载体中,将重组质粒转化BL21(DE3)感受态中,采用0.4 mM IPTG经22℃诱导表达了35 ku的重组蛋白。经western blot试验证明Plp4蛋白具有良好的反应原性...为原核表达副猪嗜血杆菌Plp4蛋白,本研究通过PCR方法扩增Plp4全长基因并克隆于pET-28a(+)载体中,将重组质粒转化BL21(DE3)感受态中,采用0.4 mM IPTG经22℃诱导表达了35 ku的重组蛋白。经western blot试验证明Plp4蛋白具有良好的反应原性,免疫6周龄昆明小鼠制备免疫血清,ELISA检测表明制备的抗血清效价在1∶15 000以上,表明Plp4蛋白具有良好的免疫原性。展开更多
目的分析并确定一个遗传性痉挛性截瘫2型(spastic paraplegia 2,SPG2)家系蛋白脂蛋白1(proteolipid protein 1,PLP1)基因突变与遗传学特征。方法收集先证者及其家系成员临床资料,采用聚合酶链反应和DNA直接测序方法进行PLP1基因突变检测...目的分析并确定一个遗传性痉挛性截瘫2型(spastic paraplegia 2,SPG2)家系蛋白脂蛋白1(proteolipid protein 1,PLP1)基因突变与遗传学特征。方法收集先证者及其家系成员临床资料,采用聚合酶链反应和DNA直接测序方法进行PLP1基因突变检测,确定基因突变位点,分析基因型与表型的关系。结果本家系先证者临床符合SPG2诊断。测序结果显示先证者PLP1基因第3外显子c.388C>T(p.His130Tyr)半合子改变,先证者之母为本位点的杂合改变。结论本家系SPG2先证者为PLP1基因半合子突变致病,遗传自表型正常携带者的母亲。本研究明确了本家系PLP1基因突变与遗传特征,为准确的遗传咨询和进一步的产前诊断打下了基础。展开更多
Infections by coronaviruses such as severe acute respiratory syndrome （SARS） coronavirus （SCoV） and mouse hepatitis virus A59 （MHV-A59） result in very little type I interferon （IFN） production by host cells, w...Infections by coronaviruses such as severe acute respiratory syndrome （SARS） coronavirus （SCoV） and mouse hepatitis virus A59 （MHV-A59） result in very little type I interferon （IFN） production by host cells, which is potentially responsible for the rapid viral growth and severe immunopathology associated with SARS. However, the molecular mechanisms for the low IFN production in cells infected with coronaviruses remain unclear. Here, we provide evidence that Papain-like protease domain 2 （PLP2）, a catalytic domain of the nonstructural protein 3 （nsp3） of MHV-A59, can bind to IRF3, cause its deubiquitination and prevent its nuclear translocation. As a consequence, co-expression of PLP2 strongly inhibits CARDIF-, TBK1- and IRF3-mediated IFNp reporter activities. In addition, we show that wild-type PLP2 but not the mutant PLP2 lacking the deubiquitinase （DUB） activity can reduce IFN induction and promote viral growth in cells infected with VSV. Thus, our study uncovered a viral DUB which coronaviruses may use to escape from the host innate antiviral responses.展开更多
文摘PLP City Range项目坐落在曼谷通罗地区一个宁静的高档社区内,是一座为尖端高尔夫模拟中心建造的创新性混合用途建筑。引人注目的建筑立面,采用曲面预制混凝土板正反向拼贴组合而成,兼具美学和功能性。这些造型独特的混凝土模块在自然光下形成光影交织的效果,巧妙地呼应了高尔夫运动挥杆时的优雅弧线,在视觉上呈现这项运动独特的魅力。
文摘目的分析并确定一个遗传性痉挛性截瘫2型(spastic paraplegia 2,SPG2)家系蛋白脂蛋白1(proteolipid protein 1,PLP1)基因突变与遗传学特征。方法收集先证者及其家系成员临床资料,采用聚合酶链反应和DNA直接测序方法进行PLP1基因突变检测,确定基因突变位点,分析基因型与表型的关系。结果本家系先证者临床符合SPG2诊断。测序结果显示先证者PLP1基因第3外显子c.388C>T(p.His130Tyr)半合子改变,先证者之母为本位点的杂合改变。结论本家系SPG2先证者为PLP1基因半合子突变致病,遗传自表型正常携带者的母亲。本研究明确了本家系PLP1基因突变与遗传特征,为准确的遗传咨询和进一步的产前诊断打下了基础。
基金These authors contributed equally to this work. We thank Drs S Vaidya and E Chow （University of California Los Angeles, USA） for their help in setting up critical experimental systems. We greatly thank Dr K Holmes （University of Colorado Health Sciences Center, USA） for sharing with us 17C1-1 cell line and helping to optimize the protocol to produce high titered MHV-A59 virus stock. We also thank Drs R Baric and L Su （University of North Carolina, USA） for the gift of MHV-A59 and guidance of virus infection. We thank Dr K Lim （National Neuroscience Institute, Singapore） for the gift of Ubi plasmids. We thank Dr M Wathelet （University of Cincinnati College of Medicine, USA） for sharing the nsp3 construct. Also we thank Dr G Gao （Institute of Biophysics, CAS） for providing us with VSV. This research was partly supported by grants from the National Natural Science Foundation of China （30728006） to Genhong Cheng and the National Basic Research Program of MOST （2004BA519A61, 2006CB504300, 2007DFC30190） to Hong Tang.
文摘Infections by coronaviruses such as severe acute respiratory syndrome （SARS） coronavirus （SCoV） and mouse hepatitis virus A59 （MHV-A59） result in very little type I interferon （IFN） production by host cells, which is potentially responsible for the rapid viral growth and severe immunopathology associated with SARS. However, the molecular mechanisms for the low IFN production in cells infected with coronaviruses remain unclear. Here, we provide evidence that Papain-like protease domain 2 （PLP2）, a catalytic domain of the nonstructural protein 3 （nsp3） of MHV-A59, can bind to IRF3, cause its deubiquitination and prevent its nuclear translocation. As a consequence, co-expression of PLP2 strongly inhibits CARDIF-, TBK1- and IRF3-mediated IFNp reporter activities. In addition, we show that wild-type PLP2 but not the mutant PLP2 lacking the deubiquitinase （DUB） activity can reduce IFN induction and promote viral growth in cells infected with VSV. Thus, our study uncovered a viral DUB which coronaviruses may use to escape from the host innate antiviral responses.
