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非组蛋白染色体蛋白对WI-38人二倍体成纤维细胞中组蛋白基因转录的激活作用。

Activation of histone gene transcription by nonhistone chromosomal proteins in WI-38 human diploid fibroblasts.

作者信息

Jansing R L, Stein J L, Stein G S

出版信息

Proc Natl Acad Sci U S A. 1977 Jan;74(1):173-7. doi: 10.1073/pnas.74.1.173.

Abstract

The regulation of histone gene expression was examined after confluent, nondividing WI-38 human diploid fibroblasts were stimulated to proliferate. Histone mRNA sequences were assayed by hybrid formation with an 3H-labeled single-stranded DNA complementary to histone mRNAs. Histone mRNA became associated with polyribosomes concomitant with the activation of DNA synthesis. The ability of chromatin from WI-38 cells to serve as a template for in vitro transcription of histone mRNA sequences parallels the onset of DNA replication. A role for nonhistone chromosomal proteins in the control of histone gene readout is suggested because, when chromatin from confluent WI-38 cells was dissociated and then reconstituted in the presence of S phase nonhistone chromosomal proteins, a 500-fold activation of histone mRNA sequence transcription was observed.

摘要

在汇合的、不分裂的WI-38人二倍体成纤维细胞被刺激增殖后,对组蛋白基因表达的调控进行了研究。通过与与组蛋白mRNA互补的3H标记单链DNA形成杂交来测定组蛋白mRNA序列。组蛋白mRNA与多核糖体的结合伴随着DNA合成的激活。WI-38细胞的染色质作为组蛋白mRNA序列体外转录模板的能力与DNA复制的开始平行。非组蛋白染色体蛋白在组蛋白基因读出控制中的作用被提出,因为当汇合的WI-38细胞的染色质被解离,然后在S期非组蛋白染色体蛋白存在下重新组装时,观察到组蛋白mRNA序列转录有500倍的激活。

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Nonhistone chromosomal proteins and histone gene transcription.非组蛋白染色体蛋白与组蛋白基因转录。
Prog Nucleic Acid Res Mol Biol. 1976;19:421-45. doi: 10.1016/s0079-6603(08)60935-6.

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[Regulatory proteins in chromatin of eucaryotes].[真核生物染色质中的调控蛋白]
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