相关实验视频

Updated: May 5, 2026

In vitro Reconstitution of the Active T. castaneum Telomerase

In vitro Reconstitution of the Active T. castaneum Telomerase

Published on: July 14, 2011

在体外测定Saccharomyces端粒酶需要EST1检测

J J Lin¹, V A Zakian

¹Fred Hutchinson Cancer Research Center, Seattle, Washington 98104, USA.

|June 30, 1995

概括

研究人员确定Est1p对于酵母 (Saccharomyces cerevisiae) 中的端粒酶活性至关重要. 这种蛋白质对于端粒维护至关重要,作为一个子单元或关联因素,影响DNA稳定性.

科学领域:

分子生物学分子生物学
遗传学是一个遗传学.
生物化学生物化学

背景情况:

端粒酶是一种核糖蛋白酶,负责维持端粒长度.
端粒缩短发生在每一次细胞分裂时,与衰老和癌症有关.
Est1p是酵母 (Saccharomyces cerevisiae) 中的一种已知蛋白质,参与端粒长度调节.

研究的目的:

为了在体外研究Est1p在端粒酶活性中的作用.
确定 Est1p 是否对端粒酶的催化功能至关重要.

主要方法:

利用基于PCR的测试来检测无细胞提取物中的端粒酶活性.
评估了RNase,治疗和核酸依赖对端粒酶活性的影响.
在缺乏Est1p (est1 delta) 的酵母菌株中检查了端粒酶活性,并分析了TLC1RNA相互作用.

主要成果:

在S. cerevisiae提取物中证实了端粒酶活性,它依赖于特定的核酸 (dGTP,dTTP) 并对RNase/处理敏感.
长时间内,从缺乏Est1p的细胞中提取的提取物中缺少端粒酶活性.
对于端粒DNA序列至关重要的TLC1RNA在est1三角细胞中保持正常,但在Est1p时特别沉.

结论:

Est1p对于酵母体中的体外端粒酶活性至关重要.
这些发现表明Est1p作为端粒酶复合体的关键子单元或关联因子起作用.
Est1p的作用对于维持端粒长度和细胞活力至关重要.

更多相关视频

Telomere Length and Telomerase Activity; A Yin and Yang of Cell Senescence

Telomere Length and Telomerase Activity; A Yin and Yang of Cell Senescence

Published on: May 22, 2013

Determination of S-Phase Duration Using 5-Ethynyl-2'-deoxyuridine Incorporation in Saccharomyces cerevisiae

Determination of S-Phase Duration Using 5-Ethynyl-2'-deoxyuridine Incorporation in Saccharomyces cerevisiae

Published on: October 21, 2022

相关概念视频

Telomeres and Telomerase

Telomeres and Telomerase

In eukaryotic DNA replication, a single-stranded DNA fragment remains at the end of a chromosome after the removal of the final primer. This section of DNA cannot be replicated in the same manner as the rest of the strand because there is no 3’ end to which the newly synthesized DNA can attach. This non-replicated fragment results in gradual loss of the chromosomal DNA during each cell duplication. Additionally, it can induce a DNA damage response by enzymes that recognize single-stranded...