采用数据独立采集蛋白质组学技术分析4℃冷藏6 d的原料乳差异蛋白质组成及其生物学功能。冷藏过程中,共鉴定到902种蛋白质。其中,冷藏前期(d 0 vs d 3)和冷藏后期(d 3 vs d 6)分别筛选出70种和71种差异表达蛋白。生物信息学分析发现冷...采用数据独立采集蛋白质组学技术分析4℃冷藏6 d的原料乳差异蛋白质组成及其生物学功能。冷藏过程中,共鉴定到902种蛋白质。其中,冷藏前期(d 0 vs d 3)和冷藏后期(d 3 vs d 6)分别筛选出70种和71种差异表达蛋白。生物信息学分析发现冷藏前期差异蛋白具有对神经生长因子的刺激反应和细胞组织的调控等功能,主要参与了细胞的生物学过程;冷藏后期差异蛋白具有碳水化合物代谢过程和RNA代谢过程的调节等功能,主要参与了糖代谢途径。蛋白-蛋白互作网络分析表明,细胞分裂控制蛋白42同源物(CDC42)是两个冷藏阶段共有的关键节点蛋白,该蛋白与细胞的吞噬作用密切相关。上述结果揭示了冷藏过程中的蛋白质组成差异和功能的多样性,为原料乳的冷藏提供了理论依据,对原料乳的质量控制具有重要意义。展开更多
为探究原料乳在4℃冷藏过程中的脂质变化,从而指导乳及乳制品的后期加工,该研究采用超高效液相色谱-三重四级杆复合线性离子阱质谱技术分别对冷藏第0、2、3、4、6天的原料乳脂质进行绝对定性定量分析。结果表明,原料乳共检出20种脂质亚...为探究原料乳在4℃冷藏过程中的脂质变化,从而指导乳及乳制品的后期加工,该研究采用超高效液相色谱-三重四级杆复合线性离子阱质谱技术分别对冷藏第0、2、3、4、6天的原料乳脂质进行绝对定性定量分析。结果表明,原料乳共检出20种脂质亚类、880种脂质分子,其中甘油三脂、磷脂酰乙醇胺、磷脂酰胆碱亚类含量最高;以P值<0.05,变量重要性投影(variable importance projection,VIP)>1为标准共筛选出420种显著性差异脂质代谢物,以P值<0.01,VIP>1为标准共筛选出98种极显著性差异脂质代谢物。整个冷藏过程中,极显著性差异脂质分子含量呈下降趋势,其中第3天与第4天对比组(D3 vs D4)脂质变化最为明显,冷藏3~4 d是原料乳脂质变化的关键阶段。对D3vs D4组的极显著差异脂质进行京都基因与基因组百科全书(kyoto encyclopedia of genes and genomes,KEGG)通路分析,10种脂质分子被注释到6条代谢途径中,其中磷脂酰胆碱、磷脂酰乙醇胺、磷脂酰肌醇、磷脂酰基丝氨酸被注释到甘油磷脂代谢及神经酰胺、鞘磷脂被注释到鞘脂代谢是该阶段的主要代谢途径。研究结果为探明原料乳冷藏过程中的脂质变化、划定脂肪水解的关键期提供理论依据,进而为后期乳制品的加工提供数据参考。展开更多
The transient receptor potential vanilloid 4(TRPV4),another Ca^2+entry channel,belongs to the vanilloid subfamily and responds to a number of different physical and chemical stimuli and exists widely in mammals.Howeve...The transient receptor potential vanilloid 4(TRPV4),another Ca^2+entry channel,belongs to the vanilloid subfamily and responds to a number of different physical and chemical stimuli and exists widely in mammals.However,our understanding of the TRPV4 in fish remains poor.Therefore,we studied the TRPV4 gene from Cynoglossus semilaevis,named CsTRPV4 that encodes a putative protein of 870 amino acids common in structure and characteristic of mammalian TRPV4,including the domains of ANK repeats,six TM,TRP domain,and CaMBD.The CsTRPV4 was expressed ubiquitously in examined tissues:higher expression in the heart,spleen,testis,and eye,but lower expression in kidney and liver.Surprisingly,the expression of CsTRPV4 in lateral line was significantly higher than in many other tissues as the CsTRPV4 was expressed significantly in the free neuromasts.In addition,CsTRPV4 in the free neuromast from the larval fish was significantly expressed in the hair cells of the free neuromasts.Therefore,the free neuromasts can act as a mechano-sensor to the mechanical stimulation in molecular level in C.semilaevis,which lays a foundation for further study of the functions of the free neuromasts.展开更多
文摘采用数据独立采集蛋白质组学技术分析4℃冷藏6 d的原料乳差异蛋白质组成及其生物学功能。冷藏过程中,共鉴定到902种蛋白质。其中,冷藏前期(d 0 vs d 3)和冷藏后期(d 3 vs d 6)分别筛选出70种和71种差异表达蛋白。生物信息学分析发现冷藏前期差异蛋白具有对神经生长因子的刺激反应和细胞组织的调控等功能,主要参与了细胞的生物学过程;冷藏后期差异蛋白具有碳水化合物代谢过程和RNA代谢过程的调节等功能,主要参与了糖代谢途径。蛋白-蛋白互作网络分析表明,细胞分裂控制蛋白42同源物(CDC42)是两个冷藏阶段共有的关键节点蛋白,该蛋白与细胞的吞噬作用密切相关。上述结果揭示了冷藏过程中的蛋白质组成差异和功能的多样性,为原料乳的冷藏提供了理论依据,对原料乳的质量控制具有重要意义。
文摘为探究原料乳在4℃冷藏过程中的脂质变化,从而指导乳及乳制品的后期加工,该研究采用超高效液相色谱-三重四级杆复合线性离子阱质谱技术分别对冷藏第0、2、3、4、6天的原料乳脂质进行绝对定性定量分析。结果表明,原料乳共检出20种脂质亚类、880种脂质分子,其中甘油三脂、磷脂酰乙醇胺、磷脂酰胆碱亚类含量最高;以P值<0.05,变量重要性投影(variable importance projection,VIP)>1为标准共筛选出420种显著性差异脂质代谢物,以P值<0.01,VIP>1为标准共筛选出98种极显著性差异脂质代谢物。整个冷藏过程中,极显著性差异脂质分子含量呈下降趋势,其中第3天与第4天对比组(D3 vs D4)脂质变化最为明显,冷藏3~4 d是原料乳脂质变化的关键阶段。对D3vs D4组的极显著差异脂质进行京都基因与基因组百科全书(kyoto encyclopedia of genes and genomes,KEGG)通路分析,10种脂质分子被注释到6条代谢途径中,其中磷脂酰胆碱、磷脂酰乙醇胺、磷脂酰肌醇、磷脂酰基丝氨酸被注释到甘油磷脂代谢及神经酰胺、鞘磷脂被注释到鞘脂代谢是该阶段的主要代谢途径。研究结果为探明原料乳冷藏过程中的脂质变化、划定脂肪水解的关键期提供理论依据,进而为后期乳制品的加工提供数据参考。
基金Supported by the Earmarked Fund for Modern Agro-Industry Technology Research System(No.CARS-47-G01)the AoShan Talents Cultivation Program supported by Qingdao National Laboratory for Marine Science and Technology(No.2017ASTCP-OS04)the Qingdao Natural Science Foundation(No.12-1-4-12-(1)-jch)
文摘The transient receptor potential vanilloid 4(TRPV4),another Ca^2+entry channel,belongs to the vanilloid subfamily and responds to a number of different physical and chemical stimuli and exists widely in mammals.However,our understanding of the TRPV4 in fish remains poor.Therefore,we studied the TRPV4 gene from Cynoglossus semilaevis,named CsTRPV4 that encodes a putative protein of 870 amino acids common in structure and characteristic of mammalian TRPV4,including the domains of ANK repeats,six TM,TRP domain,and CaMBD.The CsTRPV4 was expressed ubiquitously in examined tissues:higher expression in the heart,spleen,testis,and eye,but lower expression in kidney and liver.Surprisingly,the expression of CsTRPV4 in lateral line was significantly higher than in many other tissues as the CsTRPV4 was expressed significantly in the free neuromasts.In addition,CsTRPV4 in the free neuromast from the larval fish was significantly expressed in the hair cells of the free neuromasts.Therefore,the free neuromasts can act as a mechano-sensor to the mechanical stimulation in molecular level in C.semilaevis,which lays a foundation for further study of the functions of the free neuromasts.