| Autor: |
Youtao Lu, Jaehee Lee, Jifen Li, Srinivasa Rao Allu, Jinhui Wang, HyunBum Kim, Kevin L. Bullaughey, Stephen A. Fisher, C. Erik Nordgren, Jean G. Rosario, Stewart A. Anderson, Alexandra V. Ulyanova, Steven Brem, H. Isaac Chen, John A. Wolf, M. Sean Grady, Sergei A. Vinogradov, Junhyong Kim, James Eberwine |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
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| Zdroj: |
Nature Communications, Vol 14, Iss 1, Pp 1-19 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2041-1723 |
| DOI: |
10.1038/s41467-023-43158-6 |
| Popis: |
Abstract Genomic DNA (gDNA) undergoes structural interconversion between single- and double-stranded states during transcription, DNA repair and replication, which is critical for cellular homeostasis. We describe “CHEX-seq” which identifies the single-stranded DNA (ssDNA) in situ in individual cells. CHEX-seq uses 3’-terminal blocked, light-activatable probes to prime the copying of ssDNA into complementary DNA that is sequenced, thereby reporting the genome-wide single-stranded chromatin landscape. CHEX-seq is benchmarked in human K562 cells, and its utilities are demonstrated in cultures of mouse and human brain cells as well as immunostained spatially localized neurons in brain sections. The amount of ssDNA is dynamically regulated in response to perturbation. CHEX-seq also identifies single-stranded regions of mitochondrial DNA in single cells. Surprisingly, CHEX-seq identifies single-stranded loci in mouse and human gDNA that catalyze porphyrin metalation in vitro, suggesting a catalytic activity for genomic ssDNA. We posit that endogenous DNA enzymatic activity is a function of genomic ssDNA. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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