Reprogramming of telomeric regions during the generation of human induced pluripotent stem cells and subsequent ' G$ a/ b: p- B& G2 E% F( Qdifferentiation 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
回复 huangcong1988 的帖子 0 ]. K4 S! H% p A$ x2 k, ] ; x+ v( u, e9 \ m h& ^3 k i端粒区或染色体末端区域作者: huangcong1988 时间: 2011-6-23 21:14
# z) I7 D2 t' t z' j0 ?. h( W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
. |& v$ Q: f. |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 9 V, m. @* {5 F yis 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
1 i: W+ t8 G. w谢谢作者: huangcong1988 时间: 2011-6-24 09:19
回复 langziforever 的帖子 5 F" Z$ D2 y8 n$ V% N/ k7 g+ u. l, v; C2 k
TERRA, telomeric-repeat-containing RNA 7 Q8 a3 J! \; f6 T" c. ~/ `Telomeric 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。; m5 t* K$ q/ H6 N
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
回复 langziforever 的帖子 ) b( G! k/ j9 P. D0 N 7 t# H2 g! }9 q9 l原文,请看看,谢谢