Single-molecule and in silico dissection of the interaction between Polycomb repressive complex 2 and chromatin
Copyright © 2020 the Author(s). Published by PNAS..
Polycomb repressive complex 2 (PRC2) installs and spreads repressive histone methylation marks on eukaryotic chromosomes. Because of the key roles that PRC2 plays in development and disease, how this epigenetic machinery interacts with DNA and nucleosomes is of major interest. Nonetheless, the mechanism by which PRC2 engages with native-like chromatin remains incompletely understood. In this work, we employ single-molecule force spectroscopy and molecular dynamics simulations to dissect the behavior of PRC2 on polynucleosome arrays. Our results reveal an unexpectedly diverse repertoire of PRC2 binding configurations on chromatin. Besides reproducing known binding modes in which PRC2 interacts with bare DNA, mononucleosomes, and adjacent nucleosome pairs, our data also provide direct evidence that PRC2 can bridge pairs of distal nucleosomes. In particular, the "1-3" bridging mode, in which PRC2 engages two nucleosomes separated by one spacer nucleosome, is a preferred low-energy configuration. Moreover, we show that the distribution and stability of different PRC2-chromatin interaction modes are modulated by accessory subunits, oncogenic histone mutations, and the methylation state of chromatin. Overall, these findings have implications for the mechanism by which PRC2 spreads histone modifications and compacts chromatin. The experimental and computational platforms developed here provide a framework for understanding the molecular basis of epigenetic maintenance mediated by Polycomb-group proteins.
| Medienart: |
E-Artikel |
|---|
| Erscheinungsjahr: |
2020 |
|---|---|
| Erschienen: |
2020 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:117 |
|---|---|
| Enthalten in: |
Proceedings of the National Academy of Sciences of the United States of America - 117(2020), 48 vom: 01. Dez., Seite 30465-30475 |
| Sprache: |
Englisch |
|---|
| Beteiligte Personen: |
Leicher, Rachel [VerfasserIn] |
|---|
| Links: |
|---|
| Anmerkungen: |
Date Completed 25.01.2021 Date Revised 31.03.2024 published: Print-Electronic Citation Status MEDLINE |
|---|
| doi: |
10.1073/pnas.2003395117 |
|---|
| funding: |
|
|---|---|
| Förderinstitution / Projekttitel: |
|
| PPN (Katalog-ID): |
NLM317757040 |
|---|
| LEADER | 01000caa a22002652 4500 | ||
|---|---|---|---|
| 001 | NLM317757040 | ||
| 003 | DE-627 | ||
| 005 | 20240331232244.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 231225s2020 xx |||||o 00| ||eng c | ||
| 024 | 7 | |a 10.1073/pnas.2003395117 |2 doi | |
| 028 | 5 | 2 | |a pubmed24n1358.xml |
| 035 | |a (DE-627)NLM317757040 | ||
| 035 | |a (NLM)33208532 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rakwb | ||
| 041 | |a eng | ||
| 100 | 1 | |a Leicher, Rachel |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Single-molecule and in silico dissection of the interaction between Polycomb repressive complex 2 and chromatin |
| 264 | 1 | |c 2020 | |
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a ƒaComputermedien |b c |2 rdamedia | ||
| 338 | |a ƒa Online-Ressource |b cr |2 rdacarrier | ||
| 500 | |a Date Completed 25.01.2021 | ||
| 500 | |a Date Revised 31.03.2024 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a Copyright © 2020 the Author(s). Published by PNAS. | ||
| 520 | |a Polycomb repressive complex 2 (PRC2) installs and spreads repressive histone methylation marks on eukaryotic chromosomes. Because of the key roles that PRC2 plays in development and disease, how this epigenetic machinery interacts with DNA and nucleosomes is of major interest. Nonetheless, the mechanism by which PRC2 engages with native-like chromatin remains incompletely understood. In this work, we employ single-molecule force spectroscopy and molecular dynamics simulations to dissect the behavior of PRC2 on polynucleosome arrays. Our results reveal an unexpectedly diverse repertoire of PRC2 binding configurations on chromatin. Besides reproducing known binding modes in which PRC2 interacts with bare DNA, mononucleosomes, and adjacent nucleosome pairs, our data also provide direct evidence that PRC2 can bridge pairs of distal nucleosomes. In particular, the "1-3" bridging mode, in which PRC2 engages two nucleosomes separated by one spacer nucleosome, is a preferred low-energy configuration. Moreover, we show that the distribution and stability of different PRC2-chromatin interaction modes are modulated by accessory subunits, oncogenic histone mutations, and the methylation state of chromatin. Overall, these findings have implications for the mechanism by which PRC2 spreads histone modifications and compacts chromatin. The experimental and computational platforms developed here provide a framework for understanding the molecular basis of epigenetic maintenance mediated by Polycomb-group proteins | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, N.I.H., Extramural | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 650 | 4 | |a Research Support, U.S. Gov't, Non-P.H.S. | |
| 650 | 4 | |a Polycomb-group protein | |
| 650 | 4 | |a epigenetics | |
| 650 | 4 | |a heterochromatin | |
| 650 | 4 | |a molecular dynamics simulation | |
| 650 | 4 | |a single-molecule force spectroscopy | |
| 650 | 7 | |a Chromatin |2 NLM | |
| 650 | 7 | |a Heterochromatin |2 NLM | |
| 650 | 7 | |a Histones |2 NLM | |
| 650 | 7 | |a Nucleosomes |2 NLM | |
| 650 | 7 | |a Polycomb Repressive Complex 2 |2 NLM | |
| 650 | 7 | |a EC 2.1.1.43 |2 NLM | |
| 700 | 1 | |a Ge, Eva J |e verfasserin |4 aut | |
| 700 | 1 | |a Lin, Xingcheng |e verfasserin |4 aut | |
| 700 | 1 | |a Reynolds, Matthew J |e verfasserin |4 aut | |
| 700 | 1 | |a Xie, Wenjun |e verfasserin |4 aut | |
| 700 | 1 | |a Walz, Thomas |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Bin |e verfasserin |4 aut | |
| 700 | 1 | |a Muir, Tom W |e verfasserin |4 aut | |
| 700 | 1 | |a Liu, Shixin |e verfasserin |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t Proceedings of the National Academy of Sciences of the United States of America |d 1915 |g 117(2020), 48 vom: 01. Dez., Seite 30465-30475 |w (DE-627)NLM000008982 |x 1091-6490 |7 nnns |
| 773 | 1 | 8 | |g volume:117 |g year:2020 |g number:48 |g day:01 |g month:12 |g pages:30465-30475 |
| 856 | 4 | 0 | |u http://dx.doi.org/10.1073/pnas.2003395117 |3 Volltext |
| 912 | |a GBV_USEFLAG_A | ||
| 912 | |a GBV_NLM | ||
| 951 | |a AR | ||
| 952 | |d 117 |j 2020 |e 48 |b 01 |c 12 |h 30465-30475 | ||