Analysis of actin synthesis in early sea urchin development.

Analysis of actin synthesis in early sea urchin development.
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海胆早期发育过程中肌动蛋白合成的分析。

DOI:
10.1016/0012-1606(82)90188-9
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发表时间:
1982
影响因子:
2.7
通讯作者:
CrainJr,WR
CrainJr,WR
中科院分区:
生物学3区
文献类型:
--
作者:
Durica,DS;CrainJr,WR

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早期的研究表明,虽然肌动蛋白是海胆卵中最丰富的蛋白质之一,但肌动蛋白mRNA水平和合成在胚胎中相对较低,直到受精后约8小时。此时,mRNA丰度和蛋白质合成开始上升,到18小时,肌动蛋白mRNA的量增加了10- 25倍。在这项研究中,我们已经研究了位移的肌动蛋白异构体的合成,通过二维凝胶电泳,我们已经将这些变化与已知的变化,在胚胎actin mRNA.In体内标记的蛋白质或在体外翻译的RNA分离的各个发展阶段显示出增加inde novoactin合成相应的增加肌动蛋白mRNA。储存在卵中的肌动蛋白的主要形式与哺乳动物β-肌动蛋白共迁移,代表了在所有研究阶段合成的主要种类。另外两种肌动蛋白变体迁移到β-肌动蛋白样物质的酸性和碱性侧,但不与哺乳动物α-和γ-肌动蛋白标记物共迁移。在囊胚中,这些肌动蛋白点以1:10:2(酸性:β样:碱性)的比例存在。碱性更强的变体似乎代表主要亚型的未乙酰化前体,酸性变体也可能代表修饰的衍生物。这些研究比较了蛋白质变体的外观与特定肌动蛋白基因转录本的外观,与几个表达基因都编码主要同种型的模型一致。
Earlier studies have shown that while actin represents one of the most abundant proteins in the sea urchin egg, actin mRNA levels and synthesis are relatively low in the embryo until approximately 8 hr after fertilization. At this time, mRNA abundance and protein synthesis begin to rise and by 18 hr the amount of actin mRNA has increased 10- to 25-fold. In this study, we have examined shifts in the synthesis of actin isoforms by two-dimensional gel electrophoresis and we have related these shifts to known changes in embryonic actin mRNAs.In vivolabeling of proteins orin vitrotranslation of RNA isolated from various developmental stages shows an increase inde novoactin synthesis which corresponds to the increases in actin mRNA. The predominant form of actin stored in the egg comigrates with mammalian β-actin and represents the major species synthesized at all stages examined. Two other actin variants migrate to the acidic and basic side of the β-actin-like species, but do not comigrate with mammalian α-and γ-actin markers. At blastula, these actin spots are present in the approximate ratios of 1:10:2 (acidic:β-like:basic). The more basic variant appears to represent an unacetlyated precursor of the predominant isoform and the acidic variant may also represent a modified derivative. These studies, comparing the appearance of protein variants with the appearance of specific actin gene transcripts, are consistent with the model that several expressed genes all encode the predominant isoform.
使用增感屏或有机闪烁体来可视化通过凝胶电泳解析的放射性分子。
DOI: --
发表时间: 1980
影响因子: --
作者:
R. Laskey
通讯作者: R. Laskey
DOI: --
发表时间: 1976
影响因子: 2.7
作者:
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编码肌动蛋白 I 的果蝇肌动蛋白基因的发育表达
DOI: --
发表时间: 1981
期刊: Nature
影响因子: 64.8
作者:
E. Zulauf;F. Sánchez;S. Tobin;U. Rdest;B. Mccarthy
通讯作者: B. Mccarthy
DOI: 10.1016/0022-2836(78)90020-7
发表时间: 1978-01-01
影响因子: 5.6
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VANDEKERCKHOVE, J;WEBER, K
通讯作者: WEBER, K
经 Triton 处理的未受精和受精海胆卵皮质制剂中的肌动蛋白
DOI: --
发表时间: 1979
影响因子: 7.8
作者:
A. Spudich;J. Spudich
通讯作者: J. Spudich