Results 121 to 130 of about 136,304 (310)

Polycomb repressive complex 2 structure with inhibitor reveals a mechanism of activation and drug resistance

Nature Communications, 2016
Polycomb repressive complex 2 (PRC2) mediates gene silencing through chromatin reorganization by methylation of histone H3 lysine 27 (H3K27). Here, the authors present crystal structures of the inhibitor-bound wild-type and a mutant form of PRC2.
Alexei Brooun, Ketan S. Gajiwala, Ya-Li Deng, Wei Liu, Ben Bolaños, Patrick Bingham, You-Ai He, Wade Diehl, Nicole Grable, Pei-Pei Kung, Scott Sutton, Karen A. Maegley, Xiu Yu, Al E. Stewart   +13 more
doaj   +1 more source

Cooperativity, Specificity, and Evolutionary Stability of Polycomb Targeting in Drosophila

Cell Reports, 2014
Summary: Metazoan genomes are partitioned into modular chromosomal domains containing active or repressive chromatin. In flies, Polycomb group (PcG) response elements (PREs) recruit PHO and other DNA-binding factors and act as nucleation sites for the ...
Bernd Schuettengruber, Noa Oded Elkayam, Tom Sexton, Marianne Entrevan, Shani Stern, Aubin Thomas, Eitan Yaffe, Hugues Parrinello, Amos Tanay, Giacomo Cavalli   +9 more
doaj   +1 more source

Power, Politics, and Domestic Desire in Octavia Butler’s Lilith’s Brood [PDF]

, 2013
Octavia Butler’s works, from her short stories and novellas to her science fiction novels, focus on themes of power, control, bondage, and a desired freedom from servitude.
Nanda, Aparajita
core   +2 more sources

Aplysia CREB2 represses long-term facilitation: Relief of repression converts transient facilitation into long-term functional and structural change

Cell, 1995
The switch from short- to long-term facilitation induced by behavioral sensitization in Aplysia involves CREB-like proteins, as well as the immediate-early gene ApC/EBP. Using the bZIP domain of ApC/EBP in a two-hybrid system, we have cloned ApCREB2, a transcription factor constitutively expressed in sensory neurons that resembles human CREB2 and mouse
BARTSCH D, GHIRARDI, Mirella, SKEHEL P. A, KARL K. A, HERDER S, CHEN M, BAILEY C. H, KANDEL E. R.   +7 more
openaire   +3 more sources

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

FEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

Large variety in a panel of human colon cancer organoids in response to EZH2 inhibition [PDF]

, 2016
EZH2 inhibitors have gained great interest for their use as anti-cancer therapeutics. However, most research has focused on EZH2 mutant cancers and recently adverse effects of EZH2 inactivation have come to light.
Bounova, Gergana, Cornelissen-Steijger, Paulien, de Vries, Nienke, Koppens, Martijn A.J., Sansom, Owen J., van Lohuizen, Maarten, Wessels, Lodewyk F.A.   +6 more
core   +1 more source

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

PWOs repress gene transcription by regulating chromatin structures in Arabidopsis

Nucleic Acids Research
Abstract PWWP-DOMAIN INTERACTOR OF POLYCOMBS (PWO) family proteins play a vital role in regulating plant development. However, the molecular mechanisms of how PWOs regulate chromatin structure is elusive. Our data show that the PWO1 binding sites are enriched with positive modifications but exclusive with H3K27me3.
Tingting Yang, Dingyue Wang, Lingxiao Luo, Xiaochang Yin, Zhihan Song, Minqi Yang, Yue Zhou   +6 more
openaire   +2 more sources

Valosin‐containing protein counteracts ATP‐driven dissolution of FUS condensates through its ATPase activity in vitro

FEBS Letters, EarlyView.
Biomolecular condensates formed by fused in sarcoma (FUS) are dissolved by high ATP concentrations yet persist in cells. Using a reconstituted system, we demonstrate that valosin‐containing protein (VCP), an AAA+ ATPase, counteracts ATP‐driven dissolution of FUS condensates through its D2 ATPase activity.
Hitomi Kimura, Shin‐ichi Tate, Kyota Yasuda   +2 more
wiley   +1 more source

Hyperosmotic stress induces PARP1‐mediated HPF1‐dependent mono(ADP‐ribosyl)ation

FEBS Letters, EarlyView.
Sorbitol‐induced hyperosmotic stress rapidly induces reversible mono(ADP‐ribosyl)ation (MARylation) on PARP1 without the signs of genotoxic signaling. We show that PARP1 autoMARylation is HPF1 dependent and forms hydroxylamine‐resistant O‐glycosidic linkages.
Anna Georgina Kopasz, Mihály Mérey, Rebeka Vásárhelyi, Ramóna Pék, Victor Imburchia, László Henn, Adrián Kószó, Nicholas D. Lakin, Ivan Ahel, Sébastien Huet, Ágnes Czibula, Gyula Timinszky   +11 more
wiley   +1 more source