Department of Microbiology and Immunology, University of Michigan Medical School, 5641 Medical Sciences Building II, 1150 West Medical Center Dr., Ann Arbor, MI 48109-5620, USA.
Appl Environ Microbiol. 2011 Apr;77(7):2545-8. doi: 10.1128/AEM.02904-10. Epub 2011 Feb 4.
Unmarked gene deletions facilitate studies of Legionella pneumophila multicomponent processes, such as motility and exonuclease activity. For this purpose, FRT-flanked alleles constructed in Escherichia coli using λ-Red recombinase were transferred to L. pneumophila by natural transformation. Resistance cassettes were then efficiently excised using the Flp site-specific recombinase encoded on a plasmid that is readily lost.
未标记的基因缺失有助于研究嗜肺军团菌的多组分过程,例如运动性和核酸外切酶活性。为此,使用 λ-Red 重组酶在大肠杆菌中构建的 FRT 侧翼等位基因通过自然转化转移到嗜肺军团菌中。然后使用易于丢失的质粒上编码的 Flp 位点特异性重组酶有效地切除抗性盒。