Proximity of the Mep-1 gene to H-2D on chromosome 17 in mice.

Proximity of the Mep-1 gene to H-2D on chromosome 17 in mice.
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小鼠 17 号染色体上 Mep-1 基因与 H-2D 的邻近性。

DOI:
10.1007/bf00430310
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发表时间:
1985
期刊:
影响因子:
3.2
通讯作者:
David,CS
David,CS
中科院分区:
医学4区
文献类型:
--
作者:
Reckelhoff,JF;Bond,JS;Beynon,RJ;Savarirayan,S;David,CS

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小鼠17号染色体上的Mep-1基因控制meprin(一种肾脏刷状缘金属内肽酶)的活性。k单倍型的大多数近交系小鼠品系(例如,CBA,C3 H,AKR)明显缺乏meprin活性;这些小鼠携带Mep-1球蛋白。Meprin活性水平正常的小鼠品系被命名为Mep-1a。使用同源和重组品系的研究将Mep-1基因定位在Tlagene附近的H-2D端粒上。为了进一步研究Mep-1与Mep-1aF 1的连锁关系,将Mep-1aF 1杂种[C3H.A(KkDd)× C3H.OH(KdDk)]与Mep-1bC3H.OH(KdDk)回交,获得了Mep-1aF 1与Mep-1bC3H.OH(KdDk)的连锁关系。测定后代的H-2D标记,Pgk-2同工酶,和meprin活性。284只小鼠中有6只发生H-2D与Mep-1的交叉,交叉频率为2.1%,Mep-1与H-2D的端粒交叉为2.1个单位,与Tla的端粒交叉为0.6个单位。Mep-1基因座为未来绘制小鼠基因组的这一重要区域提供了一个新的遗传标记。
TheMep-1gene on chromosome 17 in mice controls the activity of meprin, a kidney brush border metalloendopeptidase. Most inbred mouse strains of the k haplotype (e.g., CBA, C3H, AKR) are markedly deficient in meprin activity; these mice carry theMep-1ballele. Mouse strains in which meprin activity levels are normal are designatedMep-1aStudies using congenic and recombinant strains mapped theMep-1gene telomeric toH-2Dnear theTlagene. To further study the relationship between the major histocompatibility complex andMep-1, a linkage study was conducted.Mep-1aF1hybrids [C3H.A (KkDd) × C3H.OH (KdDk)] were backcrossed withMep-1bC3H.OH (KdDk) parents. The progeny were assayed for H-2D markers, Pgk-2 isozymes, and meprin activity. Recombination betweenH-2DandMep-1occurred in 6 out of 284 mice, a crossover frequency of 2.1%.Mep-1is therefore 2.1 crossover units telomeric toH-2Dand approximately 0.6 crossover units fromTla. TheMep-1locus provides a new genetic marker for the future mapping of this important area of the mouse genome.
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