Cancer/Testis Antigen PASD1 Silences the Circadian Clock.

Cancer/Testis Antigen PASD1 Silences the Circadian Clock.
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DOI:
10.1016/j.molcel.2015.03.031
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发表时间:
2015-06-04
期刊:
影响因子:
16
通讯作者:
Partch, Carrie L.
Partch, Carrie L.
中科院分区:
生物学1区
文献类型:
--
作者:
Michael, Alicia K.;Harvey, Stacy L.;Sammons, Patrick J.;Anderson, Amanda P.;Kopalle, Hema M.;Banham, Alison H.;Partch, Carrie L.

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生物钟通过bHLH-PAS转录因子CLOCK:BMAL1每天协调转录调控的全局变化。由其他bHLH-PAS转录因子驱动的途径具有在组织特异性基础上调节活性的同源阻遏物,但尚未鉴定出CLOCK:BMAL1。我们在这里表明,癌症/睾丸抗原PASD 1履行这一作用,以抑制昼夜节律。PASD 1在进化上与CLOCK相关,并与CLOCK:BMAL 1复合物相互作用以抑制转录激活。PASD 1的表达仅限于健康个体的种系组织,但可以在致癌转化后在体细胞起源的细胞中诱导。减少人类癌细胞中的PASD 1显著增加了转录振荡的幅度,以产生更强大的昼夜节律。我们的研究结果描述了一种生殖细胞特异性蛋白在调节生物钟中的功能,并提供了从致癌转化到抑制生物钟的分子联系。
The circadian clock orchestrates global changes in transcriptional regulation on a daily basis via the bHLH-PAS transcription factor CLOCK:BMAL1. Pathways driven by other bHLH-PAS transcription factors have a homologous repressor that modulates activity on a tissue-specific basis, but none have been identified for CLOCK:BMAL1. We show here that the cancer/testis antigen PASD1 fulfills this role to suppress circadian rhythms. PASD1 is evolutionarily related to CLOCK and interacts with the CLOCK:BMAL1 complex to repress transcriptional activation. Expression of PASD1 is restricted to germline tissues in healthy individuals, but can be induced in cells of somatic origin upon oncogenic transformation. Reducing PASD1 in human cancer cells significantly increases the amplitude of transcriptional oscillations to generate more robust circadian rhythms. Our results describe a function for a germline-specific protein in regulation of the circadian clock and provide a molecular link from oncogenic transformation to suppression of circadian rhythms.
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