Multiple functions of let-23, a Caenorhabditis elegans receptor tyrosine kinase gene required for vulval induction.

Multiple functions of let-23, a Caenorhabditis elegans receptor tyrosine kinase gene required for vulval induction.
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let-23(一种外阴诱导所需的秀丽隐杆线虫受体酪氨酸激酶基因)的多种功能。

DOI:
10.1093/genetics/128.2.251
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发表时间:
1991
期刊:
影响因子:
3.3
通讯作者:
Sternberg,PW
Sternberg,PW
中科院分区:
生物学2区
文献类型:
--
作者:
Aroian,RV;Sternberg,PW

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let-23基因编码表皮生长因子(EGF)受体亚家族的一个酪氨酸激酶,在秀丽隐杆线虫发育过程中具有多种功能。我们表明,让-23功能是需要外阴前体细胞(VPC)的信号,诱导外阴分化:一个完整的损失,让-23功能的结果没有诱导。然而,一些let-23基因突变,减少但不消除let-23功能,导致VPC明显对诱导信号过敏:多达六分之五的VPC可以采用外阴的命运,而正常情况下只有三个。这些结果表明,let-23受体酪氨酸激酶控制两个相反的途径,一个刺激外阴分化,另一个负调节外阴分化。此外,对16个新的let-23突变的分析表明,let-23激酶在至少五种组织中起作用。由于各种let-23突变表型可以独立获得,let-23基因可能具有组织特异性功能。
The let-23 gene, which encodes a putative tyrosine kinase of the epidermal growth factor (EGF) receptor subfamily, has multiple functions during Caenorhabditis elegans development. We show that let-23 function is required for vulval precursor cells (VPCs) to respond to the signal that induces vulval differentiation: a complete loss of let-23 function results in no induction. However, some let-23 mutations that genetically reduce but do not eliminate let-23 function result in VPCs apparently hypersensitive to inductive signal: as many as five of six VPCs can adopt vulval fates, in contrast to the three that normally do. These results suggest that the let-23 receptor tyrosine kinase controls two opposing pathways, one that stimulates vulval differentiation and another that negatively regulates vulval differentiation. Furthermore, analysis of 16 new let-23 mutations indicates that the let-23 kinase functions in at least five tissues. Since various let-23 mutant phenotypes can be obtained independently, the let-23 gene is likely to have tissue-specific functions.
DOI: 10.1093/genetics/96.2.435
发表时间: 1980-10
期刊: Genetics
影响因子: 3.3
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发表时间: 1989
期刊: Genetics
影响因子: 3.3
作者:
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期刊: SCIENCE
影响因子: 56.9
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