热休克蛋白70(heat shock protein 70, HSP70)在生物细胞或组织免受热或氧化应激等方面起着关键作用,是已知高度保守的蛋白质之一。由于全球环境持续升温,珊瑚大面积白化、死亡,珊瑚如何应对持续升温的抗逆机制是科学研究热点。本研究...热休克蛋白70(heat shock protein 70, HSP70)在生物细胞或组织免受热或氧化应激等方面起着关键作用,是已知高度保守的蛋白质之一。由于全球环境持续升温,珊瑚大面积白化、死亡,珊瑚如何应对持续升温的抗逆机制是科学研究热点。本研究从高温胁迫短指软珊瑚测序蛋白序列数据库分析鉴定出了28个HSP70蛋白家族成员,均为酸性亲水蛋白,大部分蛋白质结构较为稳定。亚细胞定位表明HSP70蛋白主要分布在珊瑚细胞核、细胞质中,在线粒体、内质网上也有少量分布。信号肽预测表明, 28个HSP70蛋白成员中26个没有信号肽,大部分不属于分泌蛋白,不存在跨膜结构。系统进化树结果表明短指软珊瑚HSP70蛋白家族成员聚成5大类。短指软珊瑚HSP70蛋白家族结构和保守基序分析中预测到了10条保守基序motif分为5个亚族。短指软珊瑚HSP70蛋白家族二级结构主要以α-螺旋和无规则卷曲为主,α-螺旋的含量占比大。28个HSP70家族蛋白中有25个预测到了N-糖基化位点,且位点个数在1~9范围内。28个HSP70家族蛋白均预测到磷酸化位点和O-糖基化位点,总个数分别在41~96和1~23范围内。本研究HSP70家族蛋白结果为今后珊瑚在应对全球升温胁迫中的适应机制等方面研究奠定了基础。展开更多
Objective To observe the expression of HSP70 mRNA in the rat induced by glutamine.Methods ①Twenty four healthy Sprague-Dawley rats were randomly divided into four groups(n=6 in each group): groupⅠ received saline ...Objective To observe the expression of HSP70 mRNA in the rat induced by glutamine.Methods ①Twenty four healthy Sprague-Dawley rats were randomly divided into four groups(n=6 in each group): groupⅠ received saline i.v.;group Ⅱ received glutamine(Gln) 0.15 g·kg-1 i.v.;group Ш received Gln 0.45 g·kg-1 i.v.;group Ⅳ received Gln 0.75 g·kg-1 i.v..All rats were killed after 4 h administration of Gln.HSP70 mRNA from heart、liver、lung and aorta as well as GAPDH mRNA were measured by reverse transcription polymerase chain reaction(RT-PCR).② Thirty healthy Sprague-Dawley rats were randomly divided into five groups(n=6 in each group).They were killed at 1 h(group 1 h)、6 h(group 6 h)、12 h(group 12 h)、24 h(group 24 h) and 48 h(group 48 h) after administration of Gln(0.75 g·kg-1).HSP70 mRNA from heart、liver、lung and aorta as well as GAPDH mRNA were measured by reverse transcription polymerase chain reaction(RT-PCR).Results ① The expression of HSP70 mRNA in group Ⅱ、Ш and Ⅳ were higher than groupⅠ(P<0.05),and the expression in groupⅡ、Ш and Ⅳ increased gradually.②The expression of HSP70 mRNA in group 1 h、 6 h and 12 h was higher than that in 24 h and 48h(P<0.05).Conclusion Glutamine induces the expression of HSP70 mRNA in rats,and it occurs with the manner of dose and time dependent.展开更多
文摘Objective To observe the expression of HSP70 mRNA in the rat induced by glutamine.Methods ①Twenty four healthy Sprague-Dawley rats were randomly divided into four groups(n=6 in each group): groupⅠ received saline i.v.;group Ⅱ received glutamine(Gln) 0.15 g·kg-1 i.v.;group Ш received Gln 0.45 g·kg-1 i.v.;group Ⅳ received Gln 0.75 g·kg-1 i.v..All rats were killed after 4 h administration of Gln.HSP70 mRNA from heart、liver、lung and aorta as well as GAPDH mRNA were measured by reverse transcription polymerase chain reaction(RT-PCR).② Thirty healthy Sprague-Dawley rats were randomly divided into five groups(n=6 in each group).They were killed at 1 h(group 1 h)、6 h(group 6 h)、12 h(group 12 h)、24 h(group 24 h) and 48 h(group 48 h) after administration of Gln(0.75 g·kg-1).HSP70 mRNA from heart、liver、lung and aorta as well as GAPDH mRNA were measured by reverse transcription polymerase chain reaction(RT-PCR).Results ① The expression of HSP70 mRNA in group Ⅱ、Ш and Ⅳ were higher than groupⅠ(P<0.05),and the expression in groupⅡ、Ш and Ⅳ increased gradually.②The expression of HSP70 mRNA in group 1 h、 6 h and 12 h was higher than that in 24 h and 48h(P<0.05).Conclusion Glutamine induces the expression of HSP70 mRNA in rats,and it occurs with the manner of dose and time dependent.