We apologize for Proteopedia being slow to respond. For the past two years, a new implementation of Proteopedia has been being built. Soon, it will replace this 18-year old system. All existing content will be moved to the new system at a date that will be announced here.

7unc

From Proteopedia

Jump to: navigation, search

Pol II-DSIF-SPT6-PAF1c-TFIIS complex with rewrapped nucleosome

Structural highlights

7unc is a 10 chain structure with sequence from Sus scrofa. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	Electron Microscopy, Resolution 3Å
Ligands:	, , ,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

A0A7M4DUC2_PIG DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates.[RuleBase:RU004279]

Publication Abstract from PubMed

In eukaryotes, RNA polymerase (Pol) II transcribes chromatin and must move past nucleosomes, often resulting in nucleosome displacement. How Pol II unwraps the DNA from nucleosomes to allow transcription and how DNA rewraps to retain nucleosomes has been unclear. Here, we report the 3.0-angstrom cryo-electron microscopy structure of a mammalian Pol II-DSIF-SPT6-PAF1c-TFIIS-nucleosome complex stalled 54 base pairs within the nucleosome. The structure provides a mechanistic basis for nucleosome retention during transcription elongation where upstream DNA emerging from the Pol II cleft has rewrapped the proximal side of the nucleosome. The structure uncovers a direct role for Pol II and transcription elongation factors in nucleosome retention and explains how nucleosomes are retained to prevent the disruption of chromatin structure across actively transcribed genes.

Structural basis of nucleosome retention during transcription elongation.,Filipovski M, Soffers JHM, Vos SM, Farnung L Science. 2022 Jun 17;376(6599):1313-1316. doi: 10.1126/science.abo3851. Epub 2022 , Jun 16. PMID:35709268^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Filipovski M, Soffers JHM, Vos SM, Farnung L. Structural basis of nucleosome retention during transcription elongation. Science. 2022 Jun 17;376(6599):1313-1316. doi: 10.1126/science.abo3851. Epub 2022, Jun 16. PMID:35709268 doi:http://dx.doi.org/10.1126/science.abo3851