V2EX caspase-9

Caspase-9

释义 Definition

caspase-9(半胱天冬酶-9):一种参与细胞凋亡(程序性细胞死亡)内源性途径的关键蛋白酶,通常在细胞色素 c 等信号触发后被激活,并进一步激活下游的执行者半胱天冬酶(如 caspase-3),从而推动细胞进入凋亡过程。(该词也常出现在分子生物学与医学文献中,含义较为专一。)

发音 Pronunciation (IPA)

/kspes/ + /nan/(整体常读作 “caspase nine”)

例句 Examples

Caspase-9 helps start apoptosis in damaged cells.
Caspase-9 有助于在受损细胞中启动细胞凋亡。

When mitochondrial stress releases cytochrome c, caspase-9 can be activated and then trigger a cascade that amplifies cell death signals.
当线粒体压力导致细胞色素 c 释放时,caspase-9 可能被激活,继而触发级联反应,放大细胞死亡信号。

词源 Etymology

caspase“cysteine-aspartic protease(半胱氨酸-天冬氨酸蛋白酶)” 的缩合词:表示这类酶使用半胱氨酸残基进行催化,并倾向在底物的天冬氨酸位点切割。后面的 -9 表示该家族成员的编号,区分不同功能与通路位置的半胱天冬酶。

相关词 Related Words

文学作品 Notable Literary Works

该词属于现代生物医学术语,主要出现于科研论文、教材与科普作品中,较少作为传统文学作品中的常见词汇。较常见的“作品类型”包括:

  • 《Molecular Biology of the Cell》(Molecular Biology of the Cell,细胞生物学经典教材)
  • 《The Cell: A Molecular Approach》(The Cell: A Molecular Approach,细胞与分子层面教材)
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