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人类β-珠蛋白基因簇内近期重组事件的鉴定。

Identification of a recent recombination event within the human beta-globin gene cluster.

作者信息

Gerhard D S, Kidd K K, Kidd J R, Egeland J A, Housman D E

出版信息

Proc Natl Acad Sci U S A. 1984 Dec;81(24):7875-9. doi: 10.1073/pnas.81.24.7875.

Abstract

In a detailed study of inheritance of DNA sequence polymorphism in a large reference pedigree, an individual was identified with an apparent genetic recombination event within the human beta-globin gene cluster. Analysis of the haplotypes of relevant individuals within this pedigree suggested that the meiotic crossing-over event is likely to have occurred within a 19.8-kilobase-pair region of the beta-globin gene cluster. Analysis of other DNA markers closely linked to the beta-globin gene cluster--segment 12 of chromosome 11 (D11S12) and loci for insulin, the cellular oncogene c-Ha-ras, and preproparathyroid hormone--confirmed that a crossover event must have occurred within the region of chromosome 11 between D11S12 and the beta-globin gene cluster. It is suggested that the event observed has occurred within a DNA region compatible with recombinational "hot spots" suggested by population studies.

摘要

在一项对一个大型参考家系中DNA序列多态性遗传的详细研究中,鉴定出一个个体在人类β-珠蛋白基因簇内发生了明显的基因重组事件。对该家系中相关个体单倍型的分析表明,减数分裂交叉事件很可能发生在β-珠蛋白基因簇的一个19.8千碱基对区域内。对与β-珠蛋白基因簇紧密连锁的其他DNA标记——11号染色体的第12区段(D11S12)以及胰岛素、细胞癌基因c-Ha-ras和前甲状旁腺激素的基因座——的分析证实,在11号染色体上D11S12和β-珠蛋白基因簇之间的区域必定发生了一次交叉事件。有人提出,观察到的这一事件发生在与群体研究提出的重组“热点”相符的一个DNA区域内。

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