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Author:
Date:
2016-08-05
[Abstract] Anabaena sp. strain PCC 7120 has long served as a model organism for investigating N2-fixation, photosynthesis, and various plant-type metabolic pathways and biofuel production, as well as cellular differentiation (Xu et al., 2008, Halfmann et al., 2014, Golden and Yoon, 2003). Since more than 30,000 sequenced bacterial genomes are currently available (Land et al., 2015), specific gene inactivation and analyses of the corresponding mutant’s phenotype have become powerful tools in elucidating the function of a target gene. Here we describe a protocol to inactivate a target gene in Anabaena sp. PCC 7120 using a single-crossover approach. This approach requires only one-step cloning of an internal fragment of a target gene into an ...
[摘要] 菌株PCC 7120长期充当用于研究N 2 - 固定，光合作用和各种植物类型代谢途径和生物燃料生产以及细胞分化的模式生物体（Xu等人，/em>。，2008，Halfmann等人，2014，Golden and Yoon，2003）。由于目前可获得超过30,000个测序的细菌基因组（Land等人，2015），特异性基因失活和相应突变体表型的分析已成为阐明靶基因功能的有力工具。在这里，我们描述了灭活anabaena sp中的靶基因的方案。 PCC 7120使用单交叉方法。该方法仅需要将靶基因的内部片段一步克隆到整合载体中以产生货物质粒。在货物质粒和鱼腥藻染色体之间的单次交换（同源重组）时，内源靶基因通过产生3'-和5'-缺失的片段而被破坏。该基因失活方案基于整合载体pZR606（Chen等人，2015），其可以广泛应用于其他蓝细菌物种以及其他原核生物中的基因失活。
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