Mapping Chromatin Accessibility in C. elegans During Tissue Differentiation
Author Information
Author(s): Sha Ky, Gu Sam G, Pantalena-Filho Luiz C, Goh Amy, Fleenor Jamie, Blanchard Daniel, Krishna Chaya, Fire Andrew
Primary Institution: Stanford University School of Medicine
Hypothesis
How does chromatin accessibility vary for expressed and non-expressed genes during tissue differentiation in C. elegans?
Conclusion
The study found that chromatin accessibility is pervasive across all examined tissues, indicating that no regions of chromatin were completely inaccessible.
Supporting Evidence
- Transgene-driven expression of DNA/chromatin modifying enzymes was used to query chromatin structures.
- Genome-wide datasets were generated measuring chromatin accessibility at 538,000 DAM target sites.
- Results showed a strong association between nucleosome coverage and low DAM accessibility.
Takeaway
The researchers looked at how easy it is for genes to be accessed in C. elegans, and they found that even genes that aren't being used can still be reached by the cell's machinery.
Methodology
The study used a method called DALEC to measure chromatin accessibility by expressing a bacterial DNA methyltransferase in specific tissues of C. elegans and analyzing the results with high throughput sequencing.
Potential Biases
Potential biases may arise from the use of transgenes and the specific cell types examined.
Limitations
The method may not capture all aspects of chromatin structure due to its reliance on specific transgene expression.
Participant Demographics
C. elegans strains expressing DAM in muscle, hypodermis, and gut tissues.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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