一个HIV-1的参考EPITRANSCRIPTYROM
Michael S Bosmeny1,2, Adrian A Pater1,2, Li Zhang2,3
1Dept. of Biochemistry, Wake Forest University, School of Medicine, Winston-Salem, North Carolina, USA, 27101.
bioRxiv : the preprint server for biology
|February 20, 2025
概括
这项研究为人类免疫缺陷病毒1 (HIV-1) 建立了一个参考表体转录组,标准化表体转录组分析,以便在HIV-1研究中更好地重现.
科学领域:
- 分子生物学分子生物学
- 病毒学 病毒学
- 基因组学就是基因组学.
背景情况:
- 囊括RNA修饰的表写体对RNA代谢,基因调节和病毒病原性等疾病至关重要.
- 以前对人类免疫缺陷病毒1 (HIV-1) 表体转录组修饰的研究 (例如,m6A,m5C,伪尿化,因素) 使用了多种方法,阻碍了直接比较.
研究的目的:
- 建立一个标准化的参考HIV-1表写体,以提高跨研究的可复制性和可比性.
- 研究结合抗逆转录病毒疗法 (cART) 和初级CD4+T细胞环境对HIV-1RNA修饰的影响.
主要方法:
- 在使用纳米孔技术的Jurkat CD4+ T细胞中测序NL4-3 HIV-1基因组.
- 开发定制RNA制备和多重基调用算法用于修改检测.
- 使用类似甲基转移酶3 (METTL3) 抑制剂 (STM2457) 和合成RNA片段进行校正的m6A位点的验证.
主要成果:
- 产生了一种可复制的感觉和初步的反感觉HIV-1表写体,识别了m6A,m5C,伪尿和 inosine.
- 使用合成HIV-1RNA片段实现了误称修改的纠正.
- 在cART治疗或初级CD4+T细胞中,HIV-1RNA修饰显示出最小的变化,患者样本中观察到保存的m6A位点.
结论:
- 开发的方法为HIV-1表谱学提供了一个基准,增强了严谨性和统一性.
- 参考数据有助于更深入地了解HIV-1RNA的修饰及其在病毒病原发生中的作用.
- 患者样本中保存的像m6A这样的表皮转录体标记表明它们在HIV-1生物学中的潜在意义.
相关概念视频
02:28Leaky Scanning
5.1K
During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA. Marilyn Kozak discovered that the sequence RCCAUGG (where R...
5.1K
03:18Non-LTR Retrotransposons
11.3K
As the name suggests, non-LTR retrotransposons lack the long terminal repeats characteristic of the LTR retrotransposons. Additionally, both LTR and non-LTR retrotransposons use distinct mechanisms of mobilization. Non-LTR retrotransposons are further divided into two classes - Long interspersed nuclear elements (LINEs) and short interspersed nuclear elements (SINEs), both of which occur abundantly in most mammals, including humans. Some of the active non-LTR retrotransposons in humans are L1...
11.3K
03:08LTR Retrotransposons
17.3K
LTR retrotransposons are class I transposable elements with long terminal repeats flanking an internal coding region. These elements are less abundant in mammals compared to other class I transposable elements. About 8 percent of human genomic DNA comprises LTR retrotransposons. Some of the common examples of LTR retrotransposons are Ty elements in yeast and Copia elements in Drosophila.
The internal coding region of LTR retrotransposons and their mechanism of transposition closely resembles a...
The internal coding region of LTR retrotransposons and their mechanism of transposition closely resembles a...
17.3K