The central roles of telomeres and subtelomeres in antigenic variation in African trypanosomes

被引：46

作者：

Horn, D

Barry, JD

机构：

[1] Univ Glasgow, Anderson Coll, Glasgow G11 6NU, Lanark, Scotland

[2] Univ London London Sch Hyg & Trop Med, London WC1E 7HT, England

来源：

CHROMOSOME RESEARCH | 2005年 / 13卷 / 05期

基金：

英国惠康基金;

关键词：

antigenic variation; telomere; trypanosome; VSG;

D O I：

10.1007/s10577-005-0991-8

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：

Telomeres and subtelomeres are important to the virulence of a number of pathogens, as they harbour large diverse gene families associated with the maintenance of infection. Evasion of immunity by African trypanosomes involves the differential expression of variant surface glycoproteins (VSGs), which are encoded by a family of > 1500 genes and pseudogenes. This silent archive is located subtelomerically and is activated by gene conversion into specialized transcription units, which themselves are subject to silencing by allelic exclusion. Current research addresses the role of telomeres in the conversion and silencing mechanisms and in the diversification of the VSG archive.

引用

收藏

页码：525 / 533

页数：9

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