Binding of CCCTC-Binding Factor (CTCF) to the Minute Virus of Mice Genome Is Important for Proper Processing of Viral P4-Generated Pre-mRNAs.

Binding of CCCTC-Binding Factor (CTCF) to the Minute Virus of Mice Genome Is Important for Proper Processing of Viral P4-Generated Pre-mRNAs.
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DOI:
10.3390/v12121368
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发表时间:
2020-11-30
期刊:
Viruses
影响因子:
--
通讯作者:
Pintel DJ
Pintel DJ
中科院分区:
其他
文献类型:
--
作者:
Boftsi M;Majumder K;Burger LR;Pintel DJ

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盐分级感染细胞提取物的特异性染色质免疫沉淀已经证明,CCCTC结合因子(CTCF),一种高度保守的,11-锌指DNA结合蛋白,在细胞和病毒基因组组织和基因表达中具有已知的作用,特异性结合小鼠细小病毒(MVM)的基因组。减少CTCF与MVM结合的突变影响P4产生的前mRNA的加工。这些RNA剪接效率较低,产生R1 mRNA,小内含子上游的NS 2特异性外显子的定义减少,导致相对较少的R2和新的外显子跳过产物的产生。这些结果表明,CTCF是需要适当的接合MVM小内含子的剪接体和P4产生的前mRNA的加工的第一步的模型。
Specific chromatin immunoprecipitation of salt-fractionated infected cell extracts has demonstrated that the CCCTC-binding factor (CTCF), a highly conserved, 11-zinc-finger DNA-binding protein with known roles in cellular and viral genome organization and gene expression, specifically binds the genome of Minute Virus of Mice (MVM). Mutations that diminish binding of CTCF to MVM affect processing of the P4-generated pre-mRNAs. These RNAs are spliced less efficiently to generate the R1 mRNA, and definition of the NS2-specific exon upstream of the small intron is reduced, leading to relatively less R2 and the generation of a novel exon-skipped product. These results suggest a model in which CTCF is required for proper engagement of the spliceosome at the MVM small intron and for the first steps of processing of the P4-generated pre-mRNA.
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