The structure of telomeric DNA

被引:386
作者
Neidle, S [1 ]
Parkinson, GN [1 ]
机构
[1] Univ London, Sch Pharm, Canc Res UK Biomol Struct Grp, London WC1N 1AX, England
关键词
G-QUADRUPLEX DNA; END-BINDING-PROTEIN; CRYSTAL-STRUCTURE; MAMMALIAN TELOMERES; RICH STRAND; IN-VITRO; MAINTENANCE; INHIBITION; CHROMOSOME; PARALLEL;
D O I
10.1016/S0959-440X(03)00072-1
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The telomere is a nucleoprotein complex located at the ends of eukaryotic chromosomes. It is essential for maintaining the integrity of the genome. It is not a linear structure and, for much of the cell cycle, telomeric DNA is maintained in a loop structure, which serves to protect the vulnerable ends of chromosomes. Many of the key proteins in the telomere have been identified, although their interplay is still imperfectly understood and structural data are only available on a few. Telomeric DNA itself comprises simple guanine-rich repeats for most of its length, culminating in a short overhang of single-stranded sequence at the extreme 3' ends. This can, at least in vitro, fold into a wide variety of four-stranded quadruplex structures, many of whose arrangements are being revealed by crystallographic and NMR studies.
引用
收藏
页码:275 / 283
页数:9
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