The unc-22(IV) region of Caenorhabditis elegans: genetic analysis of lethal mutations.

The unc-22(IV) region of Caenorhabditis elegans: genetic analysis of lethal mutations.
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秀丽隐杆线虫的 unc-22(IV) 区域:致死突变的遗传分析。

DOI:
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发表时间:
1988
期刊:
影响因子:
3.3
通讯作者:
David L. Baillie
David L. Baillie
中科院分区:
生物学2区
文献类型:
--
作者:
Denise V. Clark;T. Rogalski;Leo M. Donati;David L. Baillie

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已经研究了 unc-22 区域中必需基因的组织,该区域由连锁群 IV 上的 sDf2 缺陷定义。使用平衡器 nT1 (IV;V)(可抑制超过 49 个图谱单位的重组),通过 EMS 诱变恢复了 LGIV(右)和 LGV(左)上的 294 个致死突变。其中 26 个突变属于 unc-22 区域。加上之前分离出的致死突变,现在共有 63 个致死突变,分为 31 个互补组。除了 sDf2 之外,还使用八个重叠缺陷在图谱上定位突变。 unc-22 区域的致死等位基因和缺陷的特征在于其末端表型。这些致死突变的图谱显示,sDf2 删除了最少 1.8 个图谱单位和最多 2.5 个图谱单位。使用截断泊松计算对该区域的必需基因数量的最小估计为 48。数据表明,秀丽隐杆线虫基因组中至少估计有大约 3500 个必需基因。
The organization of essential genes in the unc-22 region, defined by the deficiency sDf2 on linkage group IV, has been studied. Using the balancer nT1 (IV;V), which suppresses recombination over 49 map units, 294 lethal mutations on LGIV(right) and LGV(left) were recovered using EMS mutagenesis. Twenty-six of these mutations fell into the unc-22 region. Together with previously isolated lethal mutations, there is now a total of 63 lethal mutations which fall into 31 complementation groups. Mutations were positioned on the map using eight overlapping deficiencies in addition to sDf2. The lethal alleles and deficiencies in the unc-22 region were characterized with respect to their terminal phenotypes. Mapping of these lethal mutations shows that sDf2 deletes a minimum of 1.8 map units and a maximum of 2.5 map units. A minimum estimate of essential gene number for the region using a truncated Poisson calculation is 48. The data indicate a minimum estimate of approximately 3500 essential genes in the Caenorhabditis elegans genome.
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发表时间: 1984
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影响因子: 3.3
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影响因子: 3.3
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