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Author:
Date:
2020-09-20
[Abstract] Gene transcription in bacteria often starts some nucleotides upstream of the start codon. Identifying the specific Transcriptional Start Site (TSS) is essential for genetic manipulation, as in many cases upstream of the start codon there are sequence elements that are involved in gene expression regulation. Taken into account the classical gene structure, we are able to identify two kinds of transcriptional start site: primary and secondary. A primary transcriptional start site is located some nucleotides upstream of the translational start site, while a secondary transcriptional start site is located within the gene encoding sequence.
Here, we present a step by step protocol for genome-wide transcriptional start sites determination by differential RNA-sequencing (dRNA-seq) ...
[摘要] [摘要] 细菌中的基因转录通常起始于起始密码子上游的一些核苷酸。识别SPE cific Ť ranscriptional 小号挞小号ITE （TSS）为遗传操作必需的，因为在许多情况下，起始密码子上游有中涉及的基因表达调控序列元件。考虑到经典的基因结构，我们能够鉴定出两种转录起始位点：一级和二级。主要转录起始位点位于翻译起始位点上游的一些核苷酸上，而次要转录起始位点位于基因编码序列内。
这里，我们提出一步步协议全基因组吨ranscriptional 小号馅饼小号ITES d etermination通过差RNA测序（DRNA 使用肠道病原体-SEQ）福氏痢疾杆菌血清型菌株5A作为M90T模型。但是，该方法可以用于选择的任何其他细菌物种。第一步，使用热酚法从细菌培养物中纯化总RNA。核糖体RNA（rRNA）是使用商业试剂盒通过杂交探针特异性去除的。然后准备一个富含5'- 一磷酸依赖性核酸外切酶（TEX）处理的，富含初级转录本的RNA文库，用于与未进行TEX处理的文库进行比较，然后连接已知序列的RNA接头衔接子，从而确定具有单核苷酸精度的TSS。最后，对RNA进行处理以制备Illumina测序文库，并按购买的服务进行测序。通过内部生物信息学分析鉴定TSS。
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