Expression and Processing of the Rooster Protamine mRNA a

Expression and Processing of the Rooster Protamine mRNA a
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公鸡鱼精蛋白 mRNA 的表达和加工

DOI:
10.1111/j.1749-6632.1991.tb27316.x
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发表时间:
1991
影响因子:
5.2
通讯作者:
G. H. Dixon
G. H. Dixon
中科院分区:
综合性期刊3区
文献类型:
--
作者:
R. Oliva;G. H. Dixon

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在未成熟和成熟的睾丸切片上的原位杂交表明,公鸡鱼精蛋白mRNA在精子发生的减数分裂后阶段转录。Northern印迹分析表明,有两个不同群体的公鸡鱼精蛋白表达。由于每个单倍体基因组都有两个副本的鸡鱼精蛋白基因,因此提出了一个问题,即这两个mRNA群体是否对应于两个不同的基因,或者是不同的mRNA处理的结果。这两个基因只有一个核苷酸不同(第二个位点的多聚腺苷信号中多一个A),而且对几个克隆的随机测序只显示了一个PolyA尾部添加位点,这一事实支持这样的假设,即差异是由于mRNA的加工造成的。这一点得到了3‘S1图谱的支持,该图谱显示了单个PolyA尾部添加位点,这反过来表明这种异质性是由于PolyA尾部长度的差异造成的。RNase H酶切结果表明,这两个基因群(分别为470+/-20个核苷酸和430+/-20个核苷酸)被转化为一个大小为345+/-15个核苷酸的单一群体,这与S1定位所确定的多聚A尾部位置(347个核苷酸)完全一致。因此,一个物种有145个核苷酸的PolyA尾巴出现在圆形精子细胞中,第二个物种的尾巴较短,105个核苷酸的尾巴存在于细长精子细胞的后期。
In situ hybridization in immature and mature testis sections shows that the rooster protamine mRNA is transcribed in the post-meiotic stages of spermatogenesis. Two distinct populations of rooster protamine mRNA are expressed as determined by Northern blot analysis. Since there are two copies of the chicken protamine gene per haploid genome, the question was raised of whether the two mRNA populations correspond to the two different genes or was a result of differential mRNA processing. The fact that the two genes differ only in one nucleotide (one extra A in the polyadenylation signal in the second locus) and that random sequencing of several cDNA clones has revealed only one poly-A tail addition site favors the hypothesis that the differences are due to mRNA processing. This is supported by 3' S1 mapping which shows a single poly-A tail addition site, which in turn suggests that the heterogeneity is due to differences in the length of the poly-A tail. The latter is confirmed by RNAse H digestion of mRNA-Oligo-dT hybrids which shows that the two mRNA populations (470 +/- 20 nucleotide (nt) and 430 +/- 20 nt respectively) are converted to a single population of 345 +/- 15 nt in good accordance with the poly-A tail site determined by S1 mapping (347 nt). Thus one species has a poly-A tail of 145 nt appearing in round spermatids and the second, a shorter tail of 105 nt present at the later stages of elongated spermatids.
RNA 3 末端的形成控制基因表达。
DOI: 10.1146/annurev.ge.21.120187.002321
发表时间: 1987
影响因子: 11.1
作者:
Friedman,DI;Imperiale,MJ;Adhya,SL
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DOI: 10.1021/bi00324a027
发表时间: 1985-01
期刊: Biochemistry
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DOI: 10.1016/0012-1606(83)90368-8
发表时间: 1983
影响因子: 2.7
作者:
Gold,B;Fujimoto,H;Kramer,JM;Erickson,RP;Hecht,NB
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DOI: 10.1073/pnas.84.15.5316
发表时间: 1987-08-01
影响因子: 11.1
作者:
PESCHON, JJ;BEHRINGER, RR;PALMITER, RD
通讯作者: PALMITER, RD
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DOI: 10.1111/j.1432-0436.1985.tb00314.x
发表时间: 1985
期刊: Differentiation; research in biological diversity
影响因子: --
作者:
Hecht,NB;Bower,PA;Kleene,KC;Distel,RJ
通讯作者: Distel,RJ