目的:利用基于荧光差异凝胶电泳(DIGE)技术的差异蛋白质组学的方法筛选心肌缺血血瘀证小型猪血浆差异表达的蛋白,以期发现心肌缺血血瘀证特征性的差异蛋白质或蛋白质群。方法:对模型动物施行冠脉Ameroid环缩术,通过动态观察,综合评价,...目的:利用基于荧光差异凝胶电泳(DIGE)技术的差异蛋白质组学的方法筛选心肌缺血血瘀证小型猪血浆差异表达的蛋白,以期发现心肌缺血血瘀证特征性的差异蛋白质或蛋白质群。方法:对模型动物施行冠脉Ameroid环缩术,通过动态观察,综合评价,明确术后4周动物表现为冠心病(心肌缺血)血瘀证稳定的时间点。4周时前腔静脉取血,枸橼酸钠抗凝并加入蛋白酶抑制剂,血样处理后进行荧光双向差异凝胶电泳(2D-DIGE),运用Decyder软件分析得到差异蛋白点,进行MALDI-TOF/TOF分析,获取蛋白样品的肽质量指纹图。结果:共筛选出31个差异表达蛋白质点,其中17个蛋白质点在4周模型组中下调,14个蛋白点上调。对其中15个蛋白点采用质谱技术成功鉴定。白蛋白、血红素蛋白、烟酸受体在4周模型组中低表达,CH4 and secrete domain of Swine IgM、mutated immunoglobulin heavy chain、肌球蛋白、磷脂酶C、白细胞抗原相关酪蛋白磷酸酶相关蛋白、磷酸核糖焦磷酸相关蛋白-1、Ig gamma4 chain constant region在4周模型组中高表达。结论:初步发现白蛋白、碱性磷酸酶、肌球蛋白、白细胞抗原相关酪蛋白磷酸酶相关蛋白、磷酸核糖焦磷酸合成酶相关蛋白1、血红素蛋白、烟酸受体、CH4 and secrete domain of Swine IgM、mutated immunoglobulin heavy chain、磷脂酶C可能与心肌缺血血瘀证相关,有待于进一步的验证及机制研究。展开更多
Cold-induced changes of gene expression and metabolism are critical for plants to survive freezing. Largely by changing gene expression, exposure to a period of non-freezing low temperatures increases plant tolerance ...Cold-induced changes of gene expression and metabolism are critical for plants to survive freezing. Largely by changing gene expression, exposure to a period of non-freezing low temperatures increases plant tolerance to freezing--a phenomenon known as cold acclimation. Cold also induces rapid metabolic changes, which provide instant protection before temperature drops below freezing point. The molecular mechanisms for such rapid metabolic responses to cold remain largely unknown. Here, we use two-dimensional difference gel electrophoresis （2-D DIGE） analysis of sub-cellular fractions ofArabidopsis thaliana proteome coupled with spot identification by tandem mass spectrometry to identify early cold-responsive proteins in Arabidopsis. These proteins include four enzymes involved in starch degradation, three HSP100 proteins, several proteins in the tricarboxylic acid cycle, and sucrose metabolism. Upon cold treatment, the Disproportio- nating Enzyme 2 （DPE2）, a cytosolic transglucosidase metabolizing maltose to glucose, increased rapidly in the centrifugation pellet fraction and decreased in the soluble fraction. Consistent with cold-induced inactivation of DPE2 enzymatic activity, the dpe2 mutant showed increased freezing tolerance without affecting the C-repeat binding transcription factor （CBF） transcriptional pathway. These results support a model that cold-induced inactivation of DPE2 leads to rapid accumulation of maltose, which is a cold-induced compatible solute that protects cells from freezing damage. This study provides evidence for a key role of rapid post-translational regulation of carbohydrate metabolic enzymes in plant protection against sudden temperature drop.展开更多
蛋白质组技术是植物基因功能鉴定和分析的强有力工具。经典的双向电泳技术是蛋白质组研究的核心技术,但差异蛋白质组分析使其具有更大的挑战性,因此在蛋白质水平的基因表达的定量分析研究需要更高灵敏度和更宽动力线性范围的技术。双向...蛋白质组技术是植物基因功能鉴定和分析的强有力工具。经典的双向电泳技术是蛋白质组研究的核心技术,但差异蛋白质组分析使其具有更大的挑战性,因此在蛋白质水平的基因表达的定量分析研究需要更高灵敏度和更宽动力线性范围的技术。双向差异凝胶电泳(two dimension difference gel electrophoresis,2D-DIGE)是一种新出现的荧光标记的定量蛋白质组学技术,比经典的2-DE具有更高的动力学范围和灵敏性。该方法通过引入内标使得多个样品在一块胶上分离,进而减少了实验条件不一致引起的误差。2D-DIGE结合质谱、生物信息学及高可信度的统计分析使得成功地定量、鉴定植物蛋白质成为可能。本文综述了2D-DIGE蛋白质组学的基本原理,实验方法,2D-DIGE蛋白质组的优缺点和可能解决的方法,以及该技术体系在植物研究中的应用。展开更多
Pyrroloquinoline quinone （PQQ） plays a sig- nificant role as a redox cofactor in combination with dehydrogenases in bacteria. These dehydrogenases play key roles in the oxidation of important substrates for the biot...Pyrroloquinoline quinone （PQQ） plays a sig- nificant role as a redox cofactor in combination with dehydrogenases in bacteria. These dehydrogenases play key roles in the oxidation of important substrates for the biotechnology industry, such as vitamin C production. While biosynthesis of PQQ genes has been widely studied, PQQ-transport mechanisms used both two-dimensional remain unclear. Herein, we fluorescence-difference gel electrophoresis tandem mass spectrometry and RNA sequencing to investigate the effects ofpqqB overexpres- sion in an industrial strain of Gluconobacter oxydans WSH-003. We have identified 73 differentially expressed proteins and 99 differentially expressed genes, a majority of which are related to oxidation-reduction and transport processes by gene ontology analysis. We also described several putative candidate effectors that responded to increased PQQ levels resulting from pqqB overexpression. Furthermore, quantitative PCR was used to verify five putative PQQ-transport genes among different PQQ producing strains, and the results showed that ompW, B932 1930 and B932_2186 were upregulated in all conditions. Then the three genes were over-expressed in G. oxydans WSH-003 and PQQ production were detected. The results showed that extracellular PQQ of B932_1930 （a transporter） and B932_2186 （an ABC transporter perrnease） overexpression strains were enhanced by 1.77- fold and 1.67-fold, respectively. The results suggest that the proteins encoded by PqqB, B932_1930 and B932 2186 might enhance the PQQ secretion process.展开更多
目的:筛选心肌缺血相关的蛋白质,以期发现心肌缺血特征性的差异蛋白质或蛋白质群。方法:对模型动物小型猪施行冠脉Ameroid环缩术,通过对模型动物的动态观察,综合评价,并参照WHO冠心病心绞痛诊断标准,明确术后28天符合心肌缺血诊断。术...目的:筛选心肌缺血相关的蛋白质,以期发现心肌缺血特征性的差异蛋白质或蛋白质群。方法:对模型动物小型猪施行冠脉Ameroid环缩术,通过对模型动物的动态观察,综合评价,并参照WHO冠心病心绞痛诊断标准,明确术后28天符合心肌缺血诊断。术后28天,动物前腔静脉取血,血样处理后进行荧光差异蛋白电泳(2D-DIGE),对差异蛋白点进行MALDI-TOF/TOF分析,获取蛋白样品的肽质量指纹图。结果:共筛选出31个差异表达蛋白质点,其中17个蛋白质点在4周模型组中下调,14个蛋白点上调。对其中15个蛋白点采用质谱技术成功鉴定。白蛋白、血红素蛋白、烟酸受体在4周模型组中低表达,CH4 and secrete domain of Swine IgM、mutated immunoglobulin heavy chain、肌球蛋白、磷脂酶C、白细胞抗原相关酪蛋白磷酸酶相关蛋白、磷酸核糖焦磷酸相关蛋白-1、Ig gamma 4 chain constant region在4周模型组中高表达。结论:初步发现碱性磷酸酶、肌球蛋白、白细胞抗原相关酪蛋白磷酸酶相关蛋白、磷酸核糖焦磷酸合成酶相关蛋白1、血红素蛋白、烟酸受体可能与心肌缺血发生发展相关。展开更多
【目的】对水稻草状矮化病毒(Rice grassy stunt virus,RGSV)侵染寄主水稻后其叶片的差异表达蛋白进行筛选、鉴定和生物信息学分析,为进一步研究RGSV和寄主水稻互作的分子机制提供线索。【方法】采用双向荧光差异凝胶电泳(Two-dimension...【目的】对水稻草状矮化病毒(Rice grassy stunt virus,RGSV)侵染寄主水稻后其叶片的差异表达蛋白进行筛选、鉴定和生物信息学分析,为进一步研究RGSV和寄主水稻互作的分子机制提供线索。【方法】采用双向荧光差异凝胶电泳(Two-dimensional fluorescence difference in gel electrophoresis,2D-DIGE)和Image Master 2D platinum 7.0分析软件寻找差异表达蛋白,MALDI-TOF-MS(Matrix-assisted laser desorption/ionization time-of-flight tandem mass spectrometry)鉴定差异蛋白,利用BioTools软件搜索NCBI数据库,寻找匹配的相关蛋白质和功能查询。采用GOminer软件对差异蛋白进行GO(Gene ontology)聚类分析,KEGG(Kyoto encyclopedia of genes and genomes)数据库分析差异蛋白所参与的生物通路。【结果】建立了RGSV侵染与未侵染水稻的叶片双向荧光差异凝胶电泳图谱,RGSV病株与健株相比,差异倍数大于1.5的差异蛋白质点有173个,其中表达丰度升高的点有72个,表达丰度下降的点有101个,质谱鉴定了44个差异蛋白质点,25个获得成功鉴定,分属于24种蛋白质,包括RGSV的2种蛋白20.6K非结构蛋白和P5蛋白,水稻中的蛋白推定的核酮糖-1,5-二磷酸羧化酶/加氧酶大亚基、景天庚酮糖-1,7-二磷酸酶前体、推定的酪氨酸磷酸酶、HAD超家族水解酶-亚族IA蛋白变体3蛋白、水稻核酮糖-1,5-二磷酸羧化酶/加氧酶小亚基结合2-羧基阿拉伯糖醇-1,5-二磷酸复合体、类似C1结构域蛋白以及其他一些功能未知蛋白和假定蛋白。对已鉴定蛋白的生物信息分析显示,差异蛋白涉及氮素固定、氮循环代谢过程、含氮化合物代谢过程、单一生物体代谢过程、代谢过程和生物过程等6个生物学过程,在生物功能上分属7类,包括分子功能、酸胺连接酶活性、酰胺连接酶活性、催化活性、谷氨酸氨连接酶、连接酶活性和形成C-N键的连接酶活性,在细胞组件上,差异蛋白分布于不同的细胞位置,涉及展开更多
Castor bean(Ricinus communis L.),is one of the top 10 oilseed crops in the world and,therefore,of high economic value.Hybridization is one of the most effective ways to breed new varieties with high yield,high oil con...Castor bean(Ricinus communis L.),is one of the top 10 oilseed crops in the world and,therefore,of high economic value.Hybridization is one of the most effective ways to breed new varieties with high yield,high oil content,and better stress resistance.Therefore,prediction of desired traits in castor hybrid offspring is particularly important.In this study,proteomic analysis was performed to identify differentially expressed proteins(DEPs)in seeds between castor hybrid offspring and their female(Lm female line aLmAB2)and male parents(CSR·181).Among the DEPs upregulated in the seeds of hybrid offspring,the majority were related to seed yield and stress tolerance,while some were related to oil synthesis and fatty acid synthesis and metabolism in seeds.In other words,the hybrid offspring showed heterosis for seed yield,stress tolerance,oil synthesis,and fatty acid synthesis and metabolism when compared with their parents.Further,real-time quantitative polymerase chain reaction assays were performed on 12 genes encoding DEPs involved in oil synthesis,pollen abortion,yield,and stress tolerance of seeds.The results showed that the expression levels of the 12 genes were consistent with those of the DEPs.展开更多
Nitrogen(N),a macronutrient essential for plant growth and development,is needed for biosynthesis of protein and starch,which affect grain yield and quality.Application of high-N fertilizer increases plant growth,grai...Nitrogen(N),a macronutrient essential for plant growth and development,is needed for biosynthesis of protein and starch,which affect grain yield and quality.Application of high-N fertilizer increases plant growth,grain yield,and flour quality.In this study,we performed the first comparative analysis of gliadin and glutenin subproteomes during kernel development in the elite Chinese wheat cultivar Zhongmai 175 under high-N conditions by reversed-phase ultra-performance liquid chromatography and twodimensional difference gel electrophoresis(2D-DIGE).Application of high-N fertilizer led to significant increases in gluten macropolymer content,total gliadin and glutenin content,and the accumulation of individual storage protein components.Of 126 differentially accumulated proteins(DAPs)induced by high-N conditions,24 gliadins,12 high-molecularweight glutenins,and 27 low-molecular-weight glutenins were significantly upregulated.DAPs during five kernel developmental stages displayed multiple patterns of accumulation.In particular,gliadins and glutenins showed respectively five and six accumulation patterns.The accumulation of storage proteins under high-N conditions may lead to improved dough properties and bread quality.展开更多
目的肝细胞癌(hepatocellular carcinoma,HCC)的发生具有显著的性别差异,但其分子机制尚不清楚。本研究通过检测Hras12V转基因小鼠雌雄肝肿瘤组织的蛋白质组学表达差异,探讨肝肿瘤发生的性别差异机制。方法采用双向荧光差异凝胶电泳(two...目的肝细胞癌(hepatocellular carcinoma,HCC)的发生具有显著的性别差异,但其分子机制尚不清楚。本研究通过检测Hras12V转基因小鼠雌雄肝肿瘤组织的蛋白质组学表达差异,探讨肝肿瘤发生的性别差异机制。方法采用双向荧光差异凝胶电泳(two dimension difference gel electrophoresis,2D-DIGE)和基质辅助激光解吸电离飞行时间质谱(matrix-assisted laser desorption/ionization time of flight mass spectrometry,MALDI-TOF-MS)技术检测Hras12V雌雄小鼠肝肿瘤组织的蛋白质组学差异表达谱,分离并鉴定差异表达蛋白,应用蛋白质印迹法验证2D-DIGE结果,并对差异表达蛋白进行生物信息学分析,包括蛋白功能注释、分类(gene ontology,GO)分析、京都基因与基因组百科全书(kyoto encyclopedia of genes and genomes,KEGG)通路分析。结果经双向荧光差异凝胶电泳-图像分析得到1 313个蛋白点,其中差异倍数≥1.5(P<0.05)的蛋白点553个。从中选择94个差异蛋白点进行MALDI-TOF-MS鉴定,得到56种差异性表达的蛋白质。其中,与雌鼠相比,雄鼠肝肿瘤组织中高表达的蛋白有43种,低表达的蛋白有13种。选取4个差异蛋白FABP1、Albumin、Prdx6和CALR进行了蛋白质印迹法验证,其中FABP1在雄鼠肝癌中显著上调,Albumin和Prdx6在雄鼠肝癌中显著下调,CALR在雌雄小鼠肝癌中差异无统计学意义,结果与质谱数据基本一致,证明了2D-DIGE结果的可靠性。对雌雄鼠肝肿瘤组织中的差异蛋白进行GO分析,细胞组分分析显示,差异蛋白主要分布在细胞质、细胞溶质、线粒体和细胞核中;分子功能分析显示,差异蛋白主要承担poly(A)RNA结合、ATP结合和酶结合等功能;生物过程分析显示,差异蛋白主要参与运输、脂代谢过程和凋亡过程的负调控等。KEGG通路分析结果表明,差异蛋白涉及9条信号通路,主要通路包括代谢途径、内质网加工过程和细胞色素P450的异物代谢等通路。结论 Hras12V转基因�展开更多
旨在对梅花鹿(Cervus nippon)致敏鹿茸干细胞与休眠鹿茸干细胞表达蛋白进行差异筛选、鉴定及生物信息分析,为深入探讨鹿茸独特的再生分子调节机制奠定基础。本研究采用双向荧光差异凝胶电泳(Two-dimensional fluorescence difference in...旨在对梅花鹿(Cervus nippon)致敏鹿茸干细胞与休眠鹿茸干细胞表达蛋白进行差异筛选、鉴定及生物信息分析,为深入探讨鹿茸独特的再生分子调节机制奠定基础。本研究采用双向荧光差异凝胶电泳(Two-dimensional fluorescence difference in gel electrophoresis,2D-DIGE)分离蛋白样品;利用DeCyder 7.2分析软件对2D-DIGE图像进行统计学分析寻找差异表达蛋白;利用MALDI-TOF-MS(Matrix-assisted laser desorption/ionization time-of-flight tandem mass spectrometry)鉴定差异蛋白,通过Mascot软件搜索NCBInr数据库寻找匹配的蛋白;采用PANTHER(Protein Analysis Through Evolutionary Relationships)软件对差异蛋白进行聚类分析,REACTOME数据库分析差异蛋白所参与的信号通路。结果得到了致敏鹿茸干细胞与休眠鹿茸干细胞2D-DIGE图谱,致敏鹿茸干细胞与休眠鹿茸干细胞蛋白丰度相比较,比值≥1.1倍以及比值≤-1.1倍(P<0.05)的差异蛋白点有159个,其中110个上调表达,49个下调表达,EDA(Extended data analysis)分析得到了多个Marker蛋白,质谱鉴定了84个差异蛋白质点,48个为阳性结果,共来自27种蛋白质。并对已鉴定蛋白进行了GO分析以及信号通路富集分析。致敏鹿茸干细胞与休眠鹿茸干细胞蛋白差异明显,质谱鉴定获得了来自多种可能与鹿茸再生相关的差异蛋白。由此可知,鹿茸再生是鹿茸干细胞从休眠到致敏的转化过程,需要多种蛋白分子以及信号通路的综合调控。展开更多
随着科学技术的迅猛发展,现代生物学技术已经发展到后基因组时代,蛋白质组学是在整体水平上研究细胞内蛋白质组成及其活动规律的新兴学科。二维差异凝胶电泳(Two dimension difference gel electrophoresis,2D-DIGE)技术是在双向凝胶电...随着科学技术的迅猛发展,现代生物学技术已经发展到后基因组时代,蛋白质组学是在整体水平上研究细胞内蛋白质组成及其活动规律的新兴学科。二维差异凝胶电泳(Two dimension difference gel electrophoresis,2D-DIGE)技术是在双向凝胶电泳(Two-dimensional electrophoresis,2-DE)基础上发展起来的一种新兴的荧光标记的定量蛋白质组学技术,是分析和鉴定基因功能的强有力工具,比经典的2-DE技术具有更高的动力学范围和灵敏性。该文就2D-DIGE技术的发展以及在昆虫研究上的应用前景进行了展望。展开更多
文摘目的:利用基于荧光差异凝胶电泳(DIGE)技术的差异蛋白质组学的方法筛选心肌缺血血瘀证小型猪血浆差异表达的蛋白,以期发现心肌缺血血瘀证特征性的差异蛋白质或蛋白质群。方法:对模型动物施行冠脉Ameroid环缩术,通过动态观察,综合评价,明确术后4周动物表现为冠心病(心肌缺血)血瘀证稳定的时间点。4周时前腔静脉取血,枸橼酸钠抗凝并加入蛋白酶抑制剂,血样处理后进行荧光双向差异凝胶电泳(2D-DIGE),运用Decyder软件分析得到差异蛋白点,进行MALDI-TOF/TOF分析,获取蛋白样品的肽质量指纹图。结果:共筛选出31个差异表达蛋白质点,其中17个蛋白质点在4周模型组中下调,14个蛋白点上调。对其中15个蛋白点采用质谱技术成功鉴定。白蛋白、血红素蛋白、烟酸受体在4周模型组中低表达,CH4 and secrete domain of Swine IgM、mutated immunoglobulin heavy chain、肌球蛋白、磷脂酶C、白细胞抗原相关酪蛋白磷酸酶相关蛋白、磷酸核糖焦磷酸相关蛋白-1、Ig gamma4 chain constant region在4周模型组中高表达。结论:初步发现白蛋白、碱性磷酸酶、肌球蛋白、白细胞抗原相关酪蛋白磷酸酶相关蛋白、磷酸核糖焦磷酸合成酶相关蛋白1、血红素蛋白、烟酸受体、CH4 and secrete domain of Swine IgM、mutated immunoglobulin heavy chain、磷脂酶C可能与心肌缺血血瘀证相关,有待于进一步的验证及机制研究。
文摘Cold-induced changes of gene expression and metabolism are critical for plants to survive freezing. Largely by changing gene expression, exposure to a period of non-freezing low temperatures increases plant tolerance to freezing--a phenomenon known as cold acclimation. Cold also induces rapid metabolic changes, which provide instant protection before temperature drops below freezing point. The molecular mechanisms for such rapid metabolic responses to cold remain largely unknown. Here, we use two-dimensional difference gel electrophoresis （2-D DIGE） analysis of sub-cellular fractions ofArabidopsis thaliana proteome coupled with spot identification by tandem mass spectrometry to identify early cold-responsive proteins in Arabidopsis. These proteins include four enzymes involved in starch degradation, three HSP100 proteins, several proteins in the tricarboxylic acid cycle, and sucrose metabolism. Upon cold treatment, the Disproportio- nating Enzyme 2 （DPE2）, a cytosolic transglucosidase metabolizing maltose to glucose, increased rapidly in the centrifugation pellet fraction and decreased in the soluble fraction. Consistent with cold-induced inactivation of DPE2 enzymatic activity, the dpe2 mutant showed increased freezing tolerance without affecting the C-repeat binding transcription factor （CBF） transcriptional pathway. These results support a model that cold-induced inactivation of DPE2 leads to rapid accumulation of maltose, which is a cold-induced compatible solute that protects cells from freezing damage. This study provides evidence for a key role of rapid post-translational regulation of carbohydrate metabolic enzymes in plant protection against sudden temperature drop.
文摘蛋白质组技术是植物基因功能鉴定和分析的强有力工具。经典的双向电泳技术是蛋白质组研究的核心技术,但差异蛋白质组分析使其具有更大的挑战性,因此在蛋白质水平的基因表达的定量分析研究需要更高灵敏度和更宽动力线性范围的技术。双向差异凝胶电泳(two dimension difference gel electrophoresis,2D-DIGE)是一种新出现的荧光标记的定量蛋白质组学技术,比经典的2-DE具有更高的动力学范围和灵敏性。该方法通过引入内标使得多个样品在一块胶上分离,进而减少了实验条件不一致引起的误差。2D-DIGE结合质谱、生物信息学及高可信度的统计分析使得成功地定量、鉴定植物蛋白质成为可能。本文综述了2D-DIGE蛋白质组学的基本原理,实验方法,2D-DIGE蛋白质组的优缺点和可能解决的方法,以及该技术体系在植物研究中的应用。
基金This work was supported by grants from the National High Technology Research and Development Program of China （863 Program, 2012AA022103）, the National Basic Research Program of China （973 Program, 2013CB733602, 2014CB745100）, the Major Program of National Natural Science Foundation of China （Grant No. 21390204）, the Program for New Century Excellent Talents in University （NCET-12-0876）, the Foundation for the Author of National Excellent Doctoral Dissertation of China （FANEDD, 201256）, the Priority Academic Program Development of Jiangsu Higher Education Institutions, and the 111 Project （111-2-06）.
文摘Pyrroloquinoline quinone （PQQ） plays a sig- nificant role as a redox cofactor in combination with dehydrogenases in bacteria. These dehydrogenases play key roles in the oxidation of important substrates for the biotechnology industry, such as vitamin C production. While biosynthesis of PQQ genes has been widely studied, PQQ-transport mechanisms used both two-dimensional remain unclear. Herein, we fluorescence-difference gel electrophoresis tandem mass spectrometry and RNA sequencing to investigate the effects ofpqqB overexpres- sion in an industrial strain of Gluconobacter oxydans WSH-003. We have identified 73 differentially expressed proteins and 99 differentially expressed genes, a majority of which are related to oxidation-reduction and transport processes by gene ontology analysis. We also described several putative candidate effectors that responded to increased PQQ levels resulting from pqqB overexpression. Furthermore, quantitative PCR was used to verify five putative PQQ-transport genes among different PQQ producing strains, and the results showed that ompW, B932 1930 and B932_2186 were upregulated in all conditions. Then the three genes were over-expressed in G. oxydans WSH-003 and PQQ production were detected. The results showed that extracellular PQQ of B932_1930 （a transporter） and B932_2186 （an ABC transporter perrnease） overexpression strains were enhanced by 1.77- fold and 1.67-fold, respectively. The results suggest that the proteins encoded by PqqB, B932_1930 and B932 2186 might enhance the PQQ secretion process.
文摘目的:筛选心肌缺血相关的蛋白质,以期发现心肌缺血特征性的差异蛋白质或蛋白质群。方法:对模型动物小型猪施行冠脉Ameroid环缩术,通过对模型动物的动态观察,综合评价,并参照WHO冠心病心绞痛诊断标准,明确术后28天符合心肌缺血诊断。术后28天,动物前腔静脉取血,血样处理后进行荧光差异蛋白电泳(2D-DIGE),对差异蛋白点进行MALDI-TOF/TOF分析,获取蛋白样品的肽质量指纹图。结果:共筛选出31个差异表达蛋白质点,其中17个蛋白质点在4周模型组中下调,14个蛋白点上调。对其中15个蛋白点采用质谱技术成功鉴定。白蛋白、血红素蛋白、烟酸受体在4周模型组中低表达,CH4 and secrete domain of Swine IgM、mutated immunoglobulin heavy chain、肌球蛋白、磷脂酶C、白细胞抗原相关酪蛋白磷酸酶相关蛋白、磷酸核糖焦磷酸相关蛋白-1、Ig gamma 4 chain constant region在4周模型组中高表达。结论:初步发现碱性磷酸酶、肌球蛋白、白细胞抗原相关酪蛋白磷酸酶相关蛋白、磷酸核糖焦磷酸合成酶相关蛋白1、血红素蛋白、烟酸受体可能与心肌缺血发生发展相关。
文摘【目的】对水稻草状矮化病毒(Rice grassy stunt virus,RGSV)侵染寄主水稻后其叶片的差异表达蛋白进行筛选、鉴定和生物信息学分析,为进一步研究RGSV和寄主水稻互作的分子机制提供线索。【方法】采用双向荧光差异凝胶电泳(Two-dimensional fluorescence difference in gel electrophoresis,2D-DIGE)和Image Master 2D platinum 7.0分析软件寻找差异表达蛋白,MALDI-TOF-MS(Matrix-assisted laser desorption/ionization time-of-flight tandem mass spectrometry)鉴定差异蛋白,利用BioTools软件搜索NCBI数据库,寻找匹配的相关蛋白质和功能查询。采用GOminer软件对差异蛋白进行GO(Gene ontology)聚类分析,KEGG(Kyoto encyclopedia of genes and genomes)数据库分析差异蛋白所参与的生物通路。【结果】建立了RGSV侵染与未侵染水稻的叶片双向荧光差异凝胶电泳图谱,RGSV病株与健株相比,差异倍数大于1.5的差异蛋白质点有173个,其中表达丰度升高的点有72个,表达丰度下降的点有101个,质谱鉴定了44个差异蛋白质点,25个获得成功鉴定,分属于24种蛋白质,包括RGSV的2种蛋白20.6K非结构蛋白和P5蛋白,水稻中的蛋白推定的核酮糖-1,5-二磷酸羧化酶/加氧酶大亚基、景天庚酮糖-1,7-二磷酸酶前体、推定的酪氨酸磷酸酶、HAD超家族水解酶-亚族IA蛋白变体3蛋白、水稻核酮糖-1,5-二磷酸羧化酶/加氧酶小亚基结合2-羧基阿拉伯糖醇-1,5-二磷酸复合体、类似C1结构域蛋白以及其他一些功能未知蛋白和假定蛋白。对已鉴定蛋白的生物信息分析显示,差异蛋白涉及氮素固定、氮循环代谢过程、含氮化合物代谢过程、单一生物体代谢过程、代谢过程和生物过程等6个生物学过程,在生物功能上分属7类,包括分子功能、酸胺连接酶活性、酰胺连接酶活性、催化活性、谷氨酸氨连接酶、连接酶活性和形成C-N键的连接酶活性,在细胞组件上,差异蛋白分布于不同的细胞位置,涉及
基金National Natural Science Foundation of China(31860071)Research and Reform Practice Project in New Agricultural Sciences of the Ministry of Education in 2020(2020114)+5 种基金Natural Science Foundation of Inner Mongolia Autonomous Region(2021MS03008)Inner Mongolia Autonomous Region Grassland Talents Innovation Team-Castor Molecular Breeding Research Innovative Talent Team Rolling Support Project(2022)Higher Education Teaching Reform Research Project of National Ethnic Affairs Commission in 2021(21082)Fundamental Research Funds in Higher Education Institutions of Inner Mongolia in 2022(237)Autonomous Region Basic Scientific Research Business Fee Project of Inner Mongolia Minzu University in 2023(225,227,244)Inner Mongolia Autonomous Region Castor Industry Collaborative Innovation Center Construction Project(MDK2021011,MDK2022014).
文摘Castor bean(Ricinus communis L.),is one of the top 10 oilseed crops in the world and,therefore,of high economic value.Hybridization is one of the most effective ways to breed new varieties with high yield,high oil content,and better stress resistance.Therefore,prediction of desired traits in castor hybrid offspring is particularly important.In this study,proteomic analysis was performed to identify differentially expressed proteins(DEPs)in seeds between castor hybrid offspring and their female(Lm female line aLmAB2)and male parents(CSR·181).Among the DEPs upregulated in the seeds of hybrid offspring,the majority were related to seed yield and stress tolerance,while some were related to oil synthesis and fatty acid synthesis and metabolism in seeds.In other words,the hybrid offspring showed heterosis for seed yield,stress tolerance,oil synthesis,and fatty acid synthesis and metabolism when compared with their parents.Further,real-time quantitative polymerase chain reaction assays were performed on 12 genes encoding DEPs involved in oil synthesis,pollen abortion,yield,and stress tolerance of seeds.The results showed that the expression levels of the 12 genes were consistent with those of the DEPs.
基金financially supported by the National Key Research and Development Program of China(2016YFD0100502)the National Natural Science Foundation of China(31171773)
文摘Nitrogen(N),a macronutrient essential for plant growth and development,is needed for biosynthesis of protein and starch,which affect grain yield and quality.Application of high-N fertilizer increases plant growth,grain yield,and flour quality.In this study,we performed the first comparative analysis of gliadin and glutenin subproteomes during kernel development in the elite Chinese wheat cultivar Zhongmai 175 under high-N conditions by reversed-phase ultra-performance liquid chromatography and twodimensional difference gel electrophoresis(2D-DIGE).Application of high-N fertilizer led to significant increases in gluten macropolymer content,total gliadin and glutenin content,and the accumulation of individual storage protein components.Of 126 differentially accumulated proteins(DAPs)induced by high-N conditions,24 gliadins,12 high-molecularweight glutenins,and 27 low-molecular-weight glutenins were significantly upregulated.DAPs during five kernel developmental stages displayed multiple patterns of accumulation.In particular,gliadins and glutenins showed respectively five and six accumulation patterns.The accumulation of storage proteins under high-N conditions may lead to improved dough properties and bread quality.
文摘目的肝细胞癌(hepatocellular carcinoma,HCC)的发生具有显著的性别差异,但其分子机制尚不清楚。本研究通过检测Hras12V转基因小鼠雌雄肝肿瘤组织的蛋白质组学表达差异,探讨肝肿瘤发生的性别差异机制。方法采用双向荧光差异凝胶电泳(two dimension difference gel electrophoresis,2D-DIGE)和基质辅助激光解吸电离飞行时间质谱(matrix-assisted laser desorption/ionization time of flight mass spectrometry,MALDI-TOF-MS)技术检测Hras12V雌雄小鼠肝肿瘤组织的蛋白质组学差异表达谱,分离并鉴定差异表达蛋白,应用蛋白质印迹法验证2D-DIGE结果,并对差异表达蛋白进行生物信息学分析,包括蛋白功能注释、分类(gene ontology,GO)分析、京都基因与基因组百科全书(kyoto encyclopedia of genes and genomes,KEGG)通路分析。结果经双向荧光差异凝胶电泳-图像分析得到1 313个蛋白点,其中差异倍数≥1.5(P<0.05)的蛋白点553个。从中选择94个差异蛋白点进行MALDI-TOF-MS鉴定,得到56种差异性表达的蛋白质。其中,与雌鼠相比,雄鼠肝肿瘤组织中高表达的蛋白有43种,低表达的蛋白有13种。选取4个差异蛋白FABP1、Albumin、Prdx6和CALR进行了蛋白质印迹法验证,其中FABP1在雄鼠肝癌中显著上调,Albumin和Prdx6在雄鼠肝癌中显著下调,CALR在雌雄小鼠肝癌中差异无统计学意义,结果与质谱数据基本一致,证明了2D-DIGE结果的可靠性。对雌雄鼠肝肿瘤组织中的差异蛋白进行GO分析,细胞组分分析显示,差异蛋白主要分布在细胞质、细胞溶质、线粒体和细胞核中;分子功能分析显示,差异蛋白主要承担poly(A)RNA结合、ATP结合和酶结合等功能;生物过程分析显示,差异蛋白主要参与运输、脂代谢过程和凋亡过程的负调控等。KEGG通路分析结果表明,差异蛋白涉及9条信号通路,主要通路包括代谢途径、内质网加工过程和细胞色素P450的异物代谢等通路。结论 Hras12V转基因�
文摘旨在对梅花鹿(Cervus nippon)致敏鹿茸干细胞与休眠鹿茸干细胞表达蛋白进行差异筛选、鉴定及生物信息分析,为深入探讨鹿茸独特的再生分子调节机制奠定基础。本研究采用双向荧光差异凝胶电泳(Two-dimensional fluorescence difference in gel electrophoresis,2D-DIGE)分离蛋白样品;利用DeCyder 7.2分析软件对2D-DIGE图像进行统计学分析寻找差异表达蛋白;利用MALDI-TOF-MS(Matrix-assisted laser desorption/ionization time-of-flight tandem mass spectrometry)鉴定差异蛋白,通过Mascot软件搜索NCBInr数据库寻找匹配的蛋白;采用PANTHER(Protein Analysis Through Evolutionary Relationships)软件对差异蛋白进行聚类分析,REACTOME数据库分析差异蛋白所参与的信号通路。结果得到了致敏鹿茸干细胞与休眠鹿茸干细胞2D-DIGE图谱,致敏鹿茸干细胞与休眠鹿茸干细胞蛋白丰度相比较,比值≥1.1倍以及比值≤-1.1倍(P<0.05)的差异蛋白点有159个,其中110个上调表达,49个下调表达,EDA(Extended data analysis)分析得到了多个Marker蛋白,质谱鉴定了84个差异蛋白质点,48个为阳性结果,共来自27种蛋白质。并对已鉴定蛋白进行了GO分析以及信号通路富集分析。致敏鹿茸干细胞与休眠鹿茸干细胞蛋白差异明显,质谱鉴定获得了来自多种可能与鹿茸再生相关的差异蛋白。由此可知,鹿茸再生是鹿茸干细胞从休眠到致敏的转化过程,需要多种蛋白分子以及信号通路的综合调控。
