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- W2158420452 abstract "This review represents a synthesis of the work of the author and her collaborators through 40 years of research aimed at an understanding of chromatin composition and functional arrangement. It describes the progressive experimental stages, starting with autoradiography and protein analysis and continuing on to a more functional approach testing the template properties of intact nuclei, as well as nuclei depleted of, or reconstituted with, defined fractions extracted from the chromatin of other cell lines or tissues. As new questions were raised at each phase of these studies, the investigation was shifted from chromosomal proteins to the role of a small RNA that coextracted with one protein fraction and whose properties suggested a transcription-activating function. The active RNA was identified as a class in RNA, designated as 7 SK. Its properties suggested a role in the activation of two oncogenes, the SV 40 T-antigen and the mammalian c-myc gene. A detailed analysis of the c-myc gene expression during transformation induction in temperature-sensitive mammalian cells finally culminated in in vivo evidence for a role of 7 SK in c-myc deregulation, using cells transfected with antisense oligonucleotides to block 7 SK activity. This was followed by an investigation of promoter targeting by 7 SK RNP using electrophoretic mobility shift assays with whole or 7 SK-depleted cell extracts. Taken together, these studies indicate that 7 SK RNP participates in transformation-dependent deregulation of the c-myc gene by activation of two c-myc minor promoters. The implications of these findings are discussed.Key words: chromatin structure, histones, nonhistones, 7 SK RNA, the c-myc gene, transcription regulation, SV 40, transformation." @default.
- W2158420452 created "2016-06-24" @default.
- W2158420452 creator A5057742255 @default.
- W2158420452 date "1996-09-01" @default.
- W2158420452 modified "2023-09-27" @default.
- W2158420452 title "Chromatin structure and function: the heretical path to an RNA transcription factor" @default.
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- W2158420452 doi "https://doi.org/10.1139/o96-067" @default.
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