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在海胚胎发生过程中,脱氧化核化物的酸化和DNA合成
Norio Suzuki1, Hiroshi Nagano2
1Department of Biochemistry, Teikyo University School of Medicine, 2-11-1 Kaga, Itabashi-ku, Tokyo 173, Japan.
海胚胎生成显示了脱氧核酸三酸盐生产的动态变化. 对于化单个脱氧核化物的速度限制步骤在整个发展过程中各不相同.
科学领域:
- 发展生物学 发展生物学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 脱氧核酸三酸盐 (dNTPs) 是DNA合成的重要组成部分.
- 了解胚胎发生过程中的dNTP代谢对于理解发育过程至关重要.
研究的目的:
- 在Hemicentrotus pulcherrimus胚胎生成过程中调查蒂米丁,脱氧基提丁,脱氧亚登和脱氧的酸化模式.
- 为了确定在海的发育过程中,单个脱氧核糖三酸盐的产生如何发生变化.
主要方法:
- 在各种发育阶段的Hemicentrotus pulcherrimus胚胎被放射性标记的脱氧核化物 ([3H] - 蒂米丁, - 脱氧基提丁, - 脱氧腺素, - 脱氧氨酸) 化.
- 分析了化核酸和核酸的细胞内池,以量化单酸和三酸的形成.
主要成果:
- [3H] - 提米丁在早期主要转化为三酸盐,后来减少.
- [3H]-脱氧丁在单酸盐和三酸盐形式之间显示出动态转移.
- [3H]-脱氧腺和-脱氧氨酸对三酸盐的酸化在分裂后显著增加,在10小时内达到高水平.
- 在10小时后,80%的 [3H]-脱氧氨酸被恢复为三酸盐.
结论:
- 脱氧核酸三酸盐的生产概况在海膽胚胎生成过程中发生显著的变化.
- 在体内限制单个脱氧核化物化速率的步骤可能不同,并在发育过程中发生变化.
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