Dominant maternal-effect mutations causing embryonic lethality in Caenorhabditis elegans.

Dominant maternal-effect mutations causing embryonic lethality in Caenorhabditis elegans.
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导致秀丽隐杆线虫胚胎死亡的显性母体效应突变。

DOI:
10.1093/genetics/125.2.351
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发表时间:
1990
期刊:
影响因子:
3.3
通讯作者:
Wood,WB
Wood,WB
中科院分区:
生物学2区
文献类型:
--
作者:
Mains,PE;Sulston,IA;Wood,WB

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我们对秀丽隐杆线虫的显性、温度敏感、母体效应的胚胎致死突变进行了筛选,作为识别具有早期胚胎功能的某些基因类别的一种方法,特别是那些多基因家族成员和那些正常发育需要两个拷贝的基因。筛选已经确定了八个突变,代表六个基因座。其中三个位点的突变只会对胚胎生存能力产生母系影响。其余三个位点的突变引起额外的非母系(合子)效应,包括隐性致死率或不育和显性雄性交配缺陷。其中5个位点的突变会导致明显的前泌期缺陷。三个突变似乎与let-354的隐性突变等位。基因剂量实验表明,一个突变可能是单倍体充足位点上的功能缺失等位基因。其他突变似乎导致了功能获得的“有毒”基因产物。随着相应的野生型等位基因的相对剂量的增加,它们中的大多数毒性会减弱;研究表明,相关雌雄同体基因型的相对自子代存活率一般为M/+/+ > M/+ > M/M/+ > M/Df > M/M,其中M代表显性突变等位基因。
We undertook screens for dominant, temperature-sensitive, maternal-effect embryonic-lethal mutations of Caenorhabditis elegans as a way to identify certain classes of genes with early embryonic functions, in particular those that are members of multigene families and those that are required in two copies for normal development. The screens have identified eight mutations, representing six loci. Mutations at three of the loci result in only maternal effects on embryonic viability. Mutations at the remaining three loci cause additional nonmaternal (zygotic) effects, including recessive lethality or sterility and dominant male mating defects. Mutations at five of the loci cause visible pregastrulation defects. Three mutations appear to be allelic with a recessive mutation of let-354. Gene dosage experiments indicate that one mutation may be a loss-of-function allele at a haploin sufficient locus. The other mutations appear to result in gain-of-function ``poison'' gene products. Most of these become less deleterious as the relative dosage of the corresponding wild-type allele is increased; we show that relative self-progeny viabilities for the relevant hermaphrodite genotypes are generally M/+/+ > M/+ > M/M/+ > M/Df > M/M, where M represents the dominant mutant allele.
秀丽隐杆线虫温度敏感胚胎停滞突变体的细胞谱系和发育缺陷。
DOI: --
发表时间: 1980
影响因子: 2.7
作者:
E. Schierenberg;Johji Miwa;G. Ehrenstein
通讯作者: G. Ehrenstein
DOI: 10.1016/0012-1606(81)90383-3
发表时间: 1981-01-01
影响因子: 2.7
作者:
CASSADA, R;ISNENGHI, E;VONEHRENSTEIN, G
通讯作者: VONEHRENSTEIN, G
秀丽隐杆线虫早期胚胎细胞质组织所需的两个基因座。
DOI: --
发表时间: 1986
影响因子: 2.7
作者:
K. Kemphues;Nurit Wolf;W. Wood;D. Hirsh
通讯作者: D. Hirsh
DOI: 10.1016/0022-2836(77)90287-x
发表时间: 1977-01-01
影响因子: 5.6
作者:
MACLEOD, AR;WATERSTON, RH;BRENNER, S
通讯作者: BRENNER, S
DOI: 10.1017/s0016672300027099
发表时间: 1987-06-01
期刊: GENETICS RESEARCH
影响因子: 1.5
作者:
HOWELL, AM;GILMOUR, SG;ROSE, AM
通讯作者: ROSE, AM