Krinner, Simone and Heitzer, Asli P. and Diermeier, Sarah D. and Obermeier, Ingrid and Laengst, Gernot and Wagner, Ralf (2014) CpG domains downstream of TSSs promote high levels of gene expression. NUCLEIC ACIDS RESEARCH, 42 (6). pp. 3551-3564. ISSN 0305-1048, 1362-4962
Full text not available from this repository. (Request a copy)Abstract
CpG dinucleotides are known to play a crucial role in regulatory domains, affecting gene expression in their natural context. Here, we demonstrate that intragenic CpG frequency and distribution impacts transgene and genomic gene expression levels in mammalian cells. As shown for the Macrophage Inflammatory Protein 1 alpha, de novo RNA synthesis correlates with the number of CpG dinucleotides, whereas RNA splicing, stability, nuclear export and translation are not affected by the sequence modification. Differences in chromatin accessibility in vivo and altered nucleosome positioning in vitro suggest that increased CpG levels destabilize the chromatin structure. Moreover, enriched CpG levels correlate with increased RNA polymerase II elongation rates in vivo. Interestingly, elevated CpG levels particularly at the 5' end of the gene promote efficient transcription. We show that this is a genome-wide feature of highly expressed genes, by identifying a domain of similar to 700 bp with high CpG content downstream of the transcription start site, correlating with high levels of transcription. We suggest that these 5' CpG domains are required to distort the chromatin structure and to increase gene activity.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | DNA-SEQUENCE; REGULATORY ELEMENTS; METHYLATION; ISLANDS; GENOME; CELLS; TRANSCRIPTION; MACROPHAGE; INDUCTION; MODEL; |
| Subjects: | 500 Science > 570 Life sciences 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Medizinische Mikrobiologie und Hygiene Biology, Preclinical Medicine > Institut für Biochemie, Genetik und Mikrobiologie > Lehrstuhl für Biochemie III |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 15 Nov 2019 09:09 |
| Last Modified: | 15 Nov 2019 09:09 |
| URI: | https://pred.uni-regensburg.de/id/eprint/10375 |
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