Reprogramming of telomeric regions during the generation of human induced pluripotent stem cells and subsequent ( g W9 }+ P" K6 j
differentiation into fibroblast-like derivative 这是一篇文献的题目,想问问题目中那个telomeric regions 是什么意思作者: 殆死悲爱 时间: 2011-6-23 20:43
本帖最后由 huangcong1988 于 2011-6-23 21:40 编辑 ( `; `0 ]- a& [
5 q, T0 D& b# c; m+ p* P7 _ 回复 殆死悲爱 的帖子 " N/ W# R* o) {' t# Z/ ^( [( V0 p) P% U) F$ `2 R+ A
是,这篇文章也是讲在重编程过程中,端粒长度改变的,但我有一个疑问,就是该区域能转录翻译吗?端粒在wiki上这样写的:A telomere is a region of repetitive DNA sequence at the end of a chromosome, which protects the end of the chromosome from deterioration or from fusion with neighbouring chromosomes.它既然是一段DNA序列,能转录和翻译吗?作者: langziforever 时间: 2011-6-23 21:28
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以下该文章中的一句原话:Although devoid of genes, the subtelomeric and telomeric regions have the potential to transcribe telomeric repeat-containing RNA (TERRA), which + ]% F$ E+ G* `4 Q' W' [is also designated Telomeric RNA (TelRNA).这里红色标注的应该就是端粒区吧?那它是怎么产生TERRA的呢?我一直没搞懂端粒的功能,虽然它在细胞分裂时,能靠减短长度保护染色体,但既然是一段DNA序列(重复的DNA序列),那为什么它不能转录跟翻译呢?作者: langziforever 时间: 2011-6-23 21:56
回复 殆死悲爱 的帖子 b. ]& ~$ w$ A, a( o 9 g& W/ w8 R% `7 o4 l谢谢作者: huangcong1988 时间: 2011-6-24 09:19
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TERRA, telomeric-repeat-containing RNA * W& V8 u! _0 ETelomeric regions produce TERRA or TelRNA transcripts, which initiate at subtelomeric regions and extend into telomeric sequence, with the telomere leading strand serving as the template for transcription。1 B% s' k( R5 U! S9 B
根据原文,TERRA应该有抑制甲基化或者说去甲基化的作用,我把原文发给你吧作者: huangcong1988 时间: 2011-6-24 09:21
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原文,请看看,谢谢