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CELL CULTURE TUBE, 12 ML

细胞培养管,12ML

公司名称: Greiner Bio One International
产品编号: 163160
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Induction of Natural Competence in Genetically-modified Lactococcus lactis
Author:
Date:
2018-07-05
[Abstract]  Natural competence can be activated in Lactoccocus lactis subsp lactis and cremoris upon overexpression of ComX, a master regulator of bacterial competence. Herein, we demonstrate a method to activate bacterial competence by regulating the expression of the comX gene by using a nisin-inducible promoter in an L. lactis strain harboring either a chromosomal or plasmid-encoded copy of nisRK. Addition of moderate concentrations of the inducer nisin resulted in concomitant moderate levels of ComX, which led to an optimal transformation rate ... [摘要]  在过度表达细菌能力的主要调节因子ComX后,天然能力可以在乳酸乳球菌亚种乳酸和 cremoris 中激活。 在本文中,我们展示了通过在 L中使用乳链菌肽诱导型启动子调节 comX 基因的表达来激活细菌能力的方法。 含有 nisRK 的染色体或质粒编码拷贝的lactis 菌株。 加入中等浓度的诱导剂乳链菌肽导致伴随的中等水平的ComX,其导致最佳转化率(1.0×10 2 sup / -6>转化子/总细胞数/ g质粒DNA)。 在此,提出了用于能力归纳的优化协议的详细描述。

【背景】自然能力是细菌通过专门的摄取机制获得外源DNA的过程,之后内化的DNA整合到其基因组中或作为质粒DNA维持。一些细菌在特定的环境触发因素如基因毒性应激或饥饿时进入能力状态(Seitz和Blokesch,2013; Blokesch,2016)。群体感应系统,如 comCDE 或 comRS ,控制着革兰氏阳性菌的自然能力的激活(Håvarstein et al。,1995; Pestova et al。,1996; Kleerebezem et al。,1997b; Fontaine et al。,2015)。更具体地说, comC 和 comS 编码信息素,而 comD 编码组氨酸激酶和 comE 和 comR 编码响应调节器(Håvarstein et al。,1995; ...

Detection of Mitogen-activated Protein Kinase (MAPK) Activation upon Exogenous Chemical Application in Arabidopsis Protoplasts
Author:
Date:
2015-09-20
[Abstract]  The mitogen activated protein kinase cascade is a highly conserved signal pathway in plants. The exogenous chemicals, like hormones, can trigger a series of signalling cascades, including MAPK pathway, to modulate the plant physiology. Upon activation, some MAPKs are phosphorylated. It is important to develop methods that can detect changes in the phosphorylation status of MAPKs in plants when they come in contact with external chemicals. This method describes the exogenous treatment of Arabidopsis protoplasts with Kinetin and subsequent detection of the activated MAPKs. This method ... [摘要]  丝裂原活化蛋白激酶级联是植物中高度保守的信号通路。 外源化学物质,如激素,可以触发一系列信号级联,包括MAPK途径,以调节植物生理。 在激活时,一些MAPK被磷酸化。 开发能够检测植物中MAPK在与外部化学品接触时磷酸化状态的变化的方法是重要的。 该方法描述了用激动素对随后检测激活的MAPK的拟南芥原生质体的外源处理。 该方法可用于研究外源施加的化合物对拟南芥中MAPK信号级联的影响。

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