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[目的]筛选草莓枯萎病增效生物复配杀菌剂。[方法]采用菌丝生长速率法测定枯草芽孢杆菌 DJ-6与吡唑醚菌酯及其5种配比对草莓枯萎病菌的室内抑菌活性,采用田间试验测定20%吡唑醚菌酯·200亿 cfu/g枯草芽孢杆菌可湿性粉剂1000倍液、2000倍液、3000倍液以及各单剂对草莓生长性状的影响和对草莓枯萎病菌的防治效果。[结果]枯草芽孢杆菌DJ-6与吡唑醚菌酯及1∶1、1∶2、1∶3、1∶4、1∶5混配组合对草莓枯萎病菌的 EC50分别为5.3115、4.0086、3.5706、3.3509、3.2189μg/ml;5种混配组合对枯萎病菌的增效系数（SR）分别为2.28、1.77、1.53、1.64、1.11,其中以1∶1增效作用最大。20%吡唑醚菌酯·200亿cfu/g枯草芽孢杆菌可湿性粉剂三种不同浓度混配及各单剂均有促进草莓生长和防治枯萎病的效果,其中高、中浓度处理高于低浓度和单剂处理。药后30 d和80 d测定枯萎病防治效果,高浓度的防效最高为100.00%和93.11%;中浓度的防效为92.49%和86.49%,高于低浓度和各单剂处理;低浓度的防效分别为82.61%和72.42%,高于1000亿cfu/g枯草芽孢杆菌可湿性粉剂1000倍液,但低于250 g/L吡唑醚菌酯乳油2000倍液。[结论]20%吡唑醚菌酯·200亿 cfu/g枯草芽孢杆菌可湿性粉剂定植后的灌根浓度推荐为1000~2000倍液。 相似文献
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To investigate the potential effects of Vaccaria segetalis, we employed the proteomic approach on the dairy cow mammary gland epithelial cells (DCMECs). A total of 35 differentially expressed nuclear proteins were visualized by 2-DE and silver nitrate staining. Of these, five proteins also displayed significant expression changes upon treatment of the water decoction from Vaccaria segetalis, and such alterations were further confirmed by RT-PCR. Together, at both the mRNA and protein levels, the water decoction from Vaccaria segetalis increased the expression of proteins ethylmalonic encephalopathy 1 (ETHE1), vesicle amine transport protein 1 homolog (VAT1), parkinson disease protein 7 homolog (Protein DJ-1), proteasome subunit alpha type-2 (PSMA2) and SUMO-activating enzyme subunit 1 (SAE1). This study would enable a better understanding of the molecular mechanisms underlying this water decoction effects at the protein level. 相似文献
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Parkinson's disease (PD) is a complex disorder with many different causes, yet they may intersect in common pathways, raising the possibility that neuroprotective agents may have broad applicability in the treatment of PD. Current evidence suggests that mitochondrial complex I inhibition may be the central cause of sporadic PD and that derangements in complex I cause alpha-synuclein aggregation, which contributes to the demise of dopamine neurons. Accumulation and aggregation of alpha-synuclein may further contribute to the death of dopamine neurons through impairments in protein handling and detoxification. Dysfunction of parkin (a ubiquitin E3 ligase) and DJ-1 could contribute to these deficits. Strategies aimed at restoring complex I activity, reducing oxidative stress and alpha-synuclein aggregation, and enhancing protein degradation may hold particular promise as powerful neuroprotective agents in the treatment of PD. 相似文献
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[目的]对野生稻DNA导入后代进行苗期耐冷性鉴定。[方法]以普通野生稻的基因组DNA导入宁夏主栽品种宁粳16号和宁粳23号所产生的后代07DJ-4、07DJ-26、07DJ-27、07DJ-28、07DJ-39、05D4-92、05D4-160和05D4-161为试材,以宁粳16号和宁粳23号为对照,各材料幼苗经8℃低温处理后对其进行苗期(三叶期)耐冷性鉴定。[结果]各材料幼苗经低温处理后其株高、干重和叶绿素含量等均有所降低。在低温胁迫下,05D4-92、05D4-160和05D4-161的幼苗平均枯死率较其他参试品种低24.7%,且其株高、植株干重、叶绿素含量和叶绿素荧光参数等受低温影响较小,是耐冷性较强的材料。[结论]野生稻DNA导入后代05D4-92、05D4-160和05D4-161的耐冷性较好。 相似文献
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为探明黄麻链霉菌NF0919菌株和枯草芽孢杆菌DJ-6对葡萄霜霉病的生防活性,采用叶盘法分别测定了黄麻链霉菌NF0919发酵上清液、1.0×1011cfu/g枯草芽孢杆菌DJ-6 WP、代森锰锌和烯酰吗啉对葡萄霜霉病菌的室内毒力,并进行了防治葡萄霜霉病的田间试验。结果表明：NF0919菌株发酵上清液、1.0×1011cfu/g枯草芽孢杆菌DJ-6 WP、代森锰锌和烯酰吗啉对葡萄霜霉病菌孢子萌发抑制的EC50值分别为96.2859、86.6038、69.9472和7.2636μg/mL。NF0919菌株发酵20倍液和1.0×1011cfu/g枯草芽孢杆菌DJ-6 WP1000倍液对葡萄霜霉病做预防性施药时,2次药后7d的防效分别为71.55%和70.71%,2次药后14d的防效分别为67.54%和68.19%;当做治疗性施药时,2次药后7d的防效分别为59.72%和56.07%,2次药后14d的防效分别为56.88%和57.46%。两种供试生防菌剂的防效相当,且保护效果与50%代森锰锌WP 300倍液均差异不显著,而治疗效果与40%烯酰吗啉SC 200倍液均差异显著。可见,黄麻链霉菌NF0919菌株和枯草芽孢杆菌DJ-6 WP对葡萄霜霉病具有一定的生防潜力与开发的价值。 相似文献
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为研究LHK1蛋白的功能,构建了pPub-LHK1∶AG-GFP和pFastBac-LHK1表达载体,分别在烟草叶肉细胞和昆虫细胞表达百脉根组氨酸蛋白激酶LHK1跨膜蛋白。结果表明:在烟草和昆虫细胞中LHK1蛋白都能表达,且表达的蛋白在体外都能磷酸化底物(组氨酸转移酶HP1蛋白),具有组氨酸蛋白激酶活性。 相似文献
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利用RT-PCR技术,从切花月季品种"Samantha"中克隆丝氨酸蛋白酶基因RhSep1。利用生物信息学技术对所得到的丝氨酸蛋白酶RhSep1序列进行结构与功能预测。结果表明:RhSep1基因全长2 442 bp,开放阅读框编码769个氨基酸,推定该丝氨酸蛋白酶分子质量为80.48 kD。通过NCBI和MEROPS肽酶数据库等对Rh-Sep1进行Protein Blast,发现RhSep1具有肽酶S83家族SA的典型结构域PetidaseS83（序列为Tyr-108-Leu-341）和PAsubtilisinlike的结构域（序列为Tyr-348-Ile-474）。预测RhSep1可能具有信号肽、明显疏水区和典型跨膜区,同时RhSep1氨基酸序列中存在较多蛋白激酶C和酪蛋白激酶Ⅱ磷酸化位点、豆蔻酰化位点。这些活性位点往往与蛋白的磷酸化、G蛋白相互作用等信号转导事件有关,RhSep1可能存在复杂的蛋白水平调控机制。 相似文献
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A yeast gene that is essential for release from glucose repression encodes a protein kinase 总被引：120，自引：0，他引：120
The SNF1 gene plays a central role in carbon catabolite repression in the yeast Saccharomyces cerevisiae, namely that SNF1 function is required for expression of glucose-repressible genes. The nucleotide sequence of the cloned SNF1 gene was determined, and the predicted amino acid sequence shows that SNF1 encodes a 72,040-dalton polypeptide that has significant homology to the conserved catalytic domain of mammalian protein kinases. Specific antisera were prepared and used to identify the SNF1 protein. The protein was shown to transfer phosphate from adenosine triphosphate to serine and threonine residues in an in vitro autophosphorylation reaction. These findings indicate that SNF1 encodes a protein kinase and suggest that protein phosphorylation plays a critical role in regulation by carbon catabolite repression in eukaryotic cells. 相似文献
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Identification of small clusters of divergent amino acids that mediate the opposing effects of ras and Krev-1 总被引：13，自引：0，他引：13
Krev-1 is an anti-oncogene that was originally identified by its ability to induce morphologic reversion of ras-transformed cells that continue to express the ras gene. The Krev-1-encoded protein is structurally related to Ras proteins. The biological activities of a series of ras-Krev-1 chimeras were studied to test the hypothesis that Krev-1 may directly interfere with a ras function. The ras-specific and Krev-1-specific amino acids immediately surrounding residues 32 to 44, which are identical between the two proteins, determined whether the protein induced cellular transformation or suppressed ras transformation. Because this region in Ras proteins has been implicated in effector function, the results suggest that Krev-1 suppresses ras-induced transformation by interfering with interaction of Ras with its effector. 相似文献
11.
同种移植炎症因子AIF-1是一种细胞质的钙离子结合蛋白。本研究采用RT-PCR方法从齐口裂腹鱼脾脏中克隆到AIF-1,并运用生物信息学方法预测其蛋白质结构。结果表明:齐口裂腹鱼AIF-1基因包含一个444 bp的完整阅读框,编码一个由147个氨基酸组成的蛋白。AIF-1蛋白预测分子量为16.5 KDa,理论pI为4.43,无信号肽,有一个跨膜区,二级结构以α-螺旋为主,未见β-折叠区。同源建模显示齐口裂腹鱼AIF-1蛋白与已测定的小神经胶质细胞特定蛋白具有非常相似的三级结构。这为深入研究AIF-1分子结构和功能积累了参考资料。 相似文献
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Mediation of the attachment or fusion step in vesicular transport by the GTP-binding Ypt1 protein 总被引：32，自引：0，他引：32
N Segev 《Science (New York, N.Y.)》1991,252(5012):1553-1556
The function of the guanosine triphosphate (GTP)-binding protein Ypt1 in regulating vesicular traffic was studied in a cell-free system that reconstitutes transport from the endoplasmic reticulum to the Golgi. Blocking the Ypt1 protein activity resulted in accumulation of vesicles that act as an intermediate passing between the two compartments. The Ypt1 protein was found on the outer side of these vesicles. The transport process is completed by fusion of these vesicles with the acceptor compartment, and Ypt1 protein activity was needed for this step. Thus, a specific GTP-binding protein is required for either attachment or fusion (or both) of secretory vesicles with the acceptor compartment during protein secretion. 相似文献
14.
[目的]利用生物信息学方法分析基因的功能,[方法]通过生物信息学数据库和因特网上的软件进行分析,对小麦液泡膜Na+/H+反转运蛋白基因TaNHX1的理化性质、结构与功能进行了预测。[结果]TaNHX1基因编码的蛋白是一种相对分子质量为59.7 kD、等电点pI为8.13的疏水性稳定蛋白,富含Leu、Phe、Lle、Gly、Ser、Val、Ala等氨基酸。TaNHX1基因编码的氨基酸序列内含有一段氨氯吡嗪咪的结合域的高度保守序列FF-YLLPI。同源性比较发现TaNHX1与AeNHX1、TiNHX1的亲缘关系很近,分别是99%和97%,推测他们可能为同源基因,具有相似的生物学功能。[结论]该研究为进一步探讨TaNHX1的生物学功能奠定了基础。 相似文献
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Eukaryotic ribosomes are substantially larger and more complex than their bacterial counterparts. Although their core function is conserved, bacterial and eukaryotic protein synthesis differ considerably at the level of initiation. The eukaryotic small ribosomal subunit (40S) plays a central role in this process; it binds initiation factors that facilitate scanning of messenger RNAs and initiation of protein synthesis. We have determined the crystal structure of the Tetrahymena thermophila 40S ribosomal subunit in complex with eukaryotic initiation factor 1 (eIF1) at a resolution of 3.9 angstroms. The structure reveals the fold of the entire 18S ribosomal RNA and of all ribosomal proteins of the 40S subunit, and defines the interactions with eIF1. It provides insights into the eukaryotic-specific aspects of protein synthesis, including the function of eIF1 as well as signaling and regulation mediated by the ribosomal proteins RACK1 and rpS6e. 相似文献
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RanGTPase的活性蛋白RanGAP1位于细胞质中,是RanGTP/GDP循环的一个关键调节器,对细胞的核质运输和有丝分裂都有重要作用。RanGAP1是第一个为人们所证实的可被SUMO-1的蛋白质,SUMO化的RanGAP1位于核孔,与核孔蛋白RanBP2/Nup358及其相关因子相结合,对细胞周期起到调控作用。 相似文献
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水稻DA1基因的生物信息学分析 总被引：1，自引：1，他引：0
本文采用比较基因组学和生物信息学的方法,首次从水稻基因组中鉴定出一个与拟南芥控制种子和器官大小的基因DA1同源的基因,命名为OsDA1,并对这个基因的序列特征、编码蛋白的结构域、顺式元件以及遗传进化进行了分析。结果表明,OsDA1编码的蛋白具有LIM结构域、泛素互作位点和锌指结构域,与拟南芥DA1蛋白的结构一致,推测二者在控制器官发育上具有类似的功能。本研究还发现,在水稻OsDA1基因的启动子区存在多个响应不同激素和逆境信号的顺式元件,但这些元件的类型与拟南芥DA1基因的顺式元件有所不同,OsDA1与AtDA1可能在表达调控上有所不同;OsDA1基因不仅能够控制种子等器官的大小和发育,而且还可能与植物的激素信号转导和逆境响应有关。本文为下一步研究OsDA1在水稻生长发育和逆境响应中的功能以及与水稻杂种优势的关系奠定了基础。 相似文献
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根据日本乙型脑炎病毒(JEV)Whe株非结构蛋白质1(NS1)的基因序列,设计引物,利用反转录PCR从实验室保藏JEV Whe株中克隆NS1全长序列,并将其插入pET28a表达载体,构建重组表达质粒NS1-pET28a,转化大肠杆菌BL21(ED3),经IPTG诱导,得到可溶性表达的融合蛋白质His-NS1。结果表明,该融合蛋白质分子量为46ku,大量表达于上清中。镍离子亲和层析柱进行纯化得到His-NS1蛋白质,经Western-blot检测,证明其具有良好的免疫学活性,这为进一步研究JEV NS1的功能及应用奠定了基础。 相似文献
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烟草钾转运体基因TPK1的电子克隆及生物信息学分析 总被引：2，自引：0，他引：2
[目的]克隆烟草钾吸收转运基因,分析其亲缘关系,并预测其结构、性质与功能,为烟草钾转运体基因的功能研究提供基础.[方法]以利用RACE技术克隆出的烟草钾转运体基因片段的3'端序列为探针,对烟草EST数据库进行搜索,筛选与探针同源性在95%以上的EST序列,再利用DNAStar软件进行拼接.然后,应用多种生物信息学数据库... 相似文献
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为获得绵羊肺炎支原体贵州株P113基因生物信息学特征,应用DNAStar、Mega 5.0、Protparam、Protscale、IEBD等工具对其(GZ-QX1株)P113蛋白特性、结构和功能进行预测分析。结果显示,绵羊肺炎支原体GZ-QX1株P113基因序列大小为3 240bp,编码1 079个氨基酸,与绵羊肺炎支原体Y98标准株、四川SC01株、猪肺炎支原体P97、丝状支原体山羊亚种、山羊支原体山羊亚种的核苷酸序列同源性分别为99.9%、81.9%、60.4%、3.9%和5.2%。P113蛋白是分子质量约119ku的碱性蛋白,具有较多优势抗原表位;蛋白结构分析显示,P113蛋白无跨膜结构,有9个N糖基化位点,59个丝氨酸、16个苏氨酸的磷酸化位点,14种保守的特异性蛋白质激酶的结合位点;蛋白功能分析认为,P113可能是某信号传导通路的信号分子,也是一种具有良好抗原性的结构蛋白。 相似文献