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-Structure paper
Title | Structural basis of the nucleosome transition during RNA polymerase II passage. |
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Journal, issue, pages | Science, Vol. 362, Issue 6414, Page 595-598, Year 2018 |
Publish date | Nov 2, 2018 |
Authors | Tomoya Kujirai / Haruhiko Ehara / Yuka Fujino / Mikako Shirouzu / Shun-Ichi Sekine / Hitoshi Kurumizaka / |
PubMed Abstract | Genomic DNA forms chromatin, in which the nucleosome is the repeating unit. The mechanism by which RNA polymerase II (RNAPII) transcribes the nucleosomal DNA remains unclear. Here we report the cryo- ...Genomic DNA forms chromatin, in which the nucleosome is the repeating unit. The mechanism by which RNA polymerase II (RNAPII) transcribes the nucleosomal DNA remains unclear. Here we report the cryo-electron microscopy structures of RNAPII-nucleosome complexes in which RNAPII pauses at the superhelical locations SHL(-6), SHL(-5), SHL(-2), and SHL(-1) of the nucleosome. RNAPII pauses at the major histone-DNA contact sites, and the nucleosome interactions with the RNAPII subunits stabilize the pause. These structures reveal snapshots of nucleosomal transcription, in which RNAPII gradually tears DNA from the histone surface while preserving the histone octamer. The nucleosomes in the SHL(-1) complexes are bound to a "foreign" DNA segment, which might explain the histone transfer mechanism. These results provide the foundations for understanding chromatin transcription and epigenetic regulation. |
External links | Science / PubMed:30287617 |
Methods | EM (single particle) / EM (electron crystallography) |
Resolution | 5.6 - 9.9 Å |
Structure data | EMDB-6980, PDB-6a5l: EMDB-6981, PDB-6a5o: EMDB-6982, PDB-6a5p: EMDB-6983, PDB-6a5r: EMDB-6984, PDB-6a5t: |
Chemicals | ChemComp-ZN: ChemComp-MG: |
Source |
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Keywords | TRANSCRIPTION/RNA/DNA / nucleosome / chromatin / RNA polymerase / TRANSCRIPTION / TRANSCRIPTION-RNA-DNA complex |