Rutstroemia firma strain:115.86
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA372878 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR5689333_1.fastq.gz | Fastqsanger.gz | |||
| SRR5689333_2.fastq.gz | Fastqsanger.gz |
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Project description:Rutstroemia firma CBS 115.86 Standard Draft genome sequencing
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Project description:The multivalent binding of CTCF to a variety of DNA sequences is thought to underlie its ability to mediate a large repertoire of cellular functions. CTCF is a 11 zinc-finger (ZF) protein that is anchored to a majority of its target sites via binding to a 20 base-pair core DNA sequence. Yet the diversity of CTCF binding sites (CBS) has not fully been characterized. Here we assessed CTCF occupancy in cultured mouse cortical neurons as a function of neuronal activity and observed that ~ 22 % of CBS lack the consensus CTCF motif. We report that sequence diversity at most of these atypical CBS is not random but involves degeneracy at specific nucleotide positions within the core CTCF position weight matrix (PWM) that likely affect the binding of ZFs 6 and 7. Surprisingly, degeneracy at the same nucleotides not only define most atypical CBS, but also CBS within most gene promoters, and CBS that are dynamically altered following neuronal stimulation, revealing how atypical CTCF binding could affect gene activity. Dynamic CBS across neural differentiation and neuronal stimulation are found both within and outside loop anchors and TADs, indicating that dynamic CBS could regulate gene activity independently of loop anchoring. Finally, we identified a second mode of atypical CTCF binding that defines most tissue-specific CBS. Unlike other atypical CBS, tissue-specific CBS largely bind sequences unrelated to the core CTCF motif and are enriched within the bodies of tissue-specific genes. Overall, these results indicate how CTCF binding at atypical CBS could allow it to dynamically regulate gene activity patterns during differentiation, development, and in response to environmental cues.
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Project description:The multivalent binding of CTCF to a variety of DNA sequences is thought to underlie its ability to mediate a large repertoire of cellular functions. CTCF is a 11 zinc-finger (ZF) protein that is anchored to a majority of its target sites via binding to a 20 base-pair core DNA sequence. Yet the diversity of CTCF binding sites (CBS) has not fully been characterized. Here we assessed CTCF occupancy in cultured mouse cortical neurons as a function of neuronal activity and observed that ~ 22 % of CBS lack the consensus CTCF motif. We report that sequence diversity at most of these atypical CBS is not random but involves degeneracy at specific nucleotide positions within the core CTCF position weight matrix (PWM) that likely affect the binding of ZFs 6 and 7. Surprisingly, degeneracy at the same nucleotides not only define most atypical CBS, but also CBS within most gene promoters, and CBS that are dynamically altered following neuronal stimulation, revealing how atypical CTCF binding could affect gene activity. Dynamic CBS across neural differentiation and neuronal stimulation are found both within and outside loop anchors and TADs, indicating that dynamic CBS could regulate gene activity independently of loop anchoring. Finally, we identified a second mode of atypical CTCF binding that defines most tissue-specific CBS. Unlike other atypical CBS, tissue-specific CBS largely bind sequences unrelated to the core CTCF motif and are enriched within the bodies of tissue-specific genes. Overall, these results indicate how CTCF binding at atypical CBS could allow it to dynamically regulate gene activity patterns during differentiation, development, and in response to environmental cues.
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