Inhibition of cell division induced by external guide sequences (EGS Technology) targeting ftsZ.

Inhibition of cell division induced by external guide sequences (EGS Technology) targeting ftsZ.
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DOI:
10.1371/journal.pone.0047690
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Tolmasky ME
Tolmasky ME
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Sala CD;Soler-Bistué AJ;Korprapun L;Zorreguieta A;Tolmasky ME

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EGS(external guide sequence)技术是一种很有前途的设计新抗生素的方法。EGS是通过形成前体tRNA样复合物诱导RNA酶P介导的靶RNA切割的短反义寡核糖核苷酸。对ftsZ mRNA二级结构进行建模,并设计了与两个区域互补的EGS,这两个区域具有成为合适靶标的高概率。在体外反应表明,EGSs针对这些地区结合ftsZ mRNA,并引发RNase P介导的切割ftsZ mRNA。产生了重组质粒pEGSb 1,其编码靶向T7启动子控制下的区域“B”的EGS。将该质粒导入大肠杆菌BL21(DE3)(pLysS)后,当EGS的表达被诱导时,Escherichia coli菌株形成丝状体。同时,E。pEGSb1对大肠杆菌的生长有一定的抑制作用,但在诱导EGSb1合成时,抑制作用明显。我们的研究结果表明,EGS技术可能是一种可行的策略,以产生新的抗菌剂靶向ftsZ。
EGS (external guide sequence) technology is a promising approach to designing new antibiotics. EGSs are short antisense oligoribonucleotides that induce RNase P-mediated cleavage of a target RNA by forming a precursor tRNA-like complex. The ftsZ mRNA secondary structure was modeled and EGSs complementary to two regions with high probability of being suitable targets were designed. In vitro reactions showed that EGSs targeting these regions bound ftsZ mRNA and elicited RNase P-mediated cleavage of ftsZ mRNA. A recombinant plasmid, pEGSb1, coding for an EGS that targets region “b” under the control of the T7 promoter was generated. Upon introduction of this plasmid into Escherichia coli BL21(DE3)(pLysS) the transformant strain formed filaments when expression of the EGS was induced. Concomitantly, E. coli harboring pEGSb1 showed a modest but significant inhibition of growth when synthesis of the EGSb1 was induced. Our results indicate that EGS technology could be a viable strategy to generate new antimicrobials targeting ftsZ.
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