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Mobilization of a plant transposon by expression of the transposon-encoded anti-silencing factor.
We report the characterization of a TE encoding an activity to counteract epigenetic silencing by the host. In Arabidopsis thaliana, we identified a mobile copy of the Mutator-like element (MULE) with degenerated terminal inverted repeats (TIRs). This TE, named Hiun (Hi), is silent in wild-type plan...
Getting to the heart of the matter: long non-coding RNAs in cardiac development and disease.
We discuss recent findings suggesting that lncRNAs are important factors in regulation of mammalian cardiogenesis and in the pathogenesis of CHD as well as adult cardiac disease. We also outline potential methodological and conceptual considerations for future studies of lncRNAs in the heart and oth...
BRCA1 is a negative modulator of the PRC2 complex.
We show that the tumour-suppressor protein BRCA1 interacts with the Polycomb protein EZH2 in mouse embryonic stem (ES) and human breast cancer cells. The BRCA1-binding region in EZH2 overlaps with the noncoding RNA (ncRNA)-binding domain, and BRCA1 expression inhibits the binding of EZH2 to the HOTA...
A sweet TET-à-tête-synergy of TET proteins and O-GlcNAc transferase in transcription.
5-hydroxy methyl cytosine (5hmC) is a modification identified in vertebrates several decades ago. More recently, a possible role of 5hmC as an epigenetic modifier and/or transcriptional regulator has started to emerge, with altered levels in early embryonic development, embryonic stem (ES) cell diff...
hCAF1/CNOT7 regulates interferon signalling by targeting STAT1.
We show that hCAF1/CNOT7 regulates class I and II IFN pathways at different crucial steps. In resting cells, hCAF1 can control STAT1 trafficking by interacting with the latent form of STAT1 in the cytoplasm. IFN treatment induces STAT1 release, suggesting that hCAF1 may shield cytoplasmic STAT1 from...
Prophase pathway-dependent removal of cohesin from human chromosomes requires opening of the Smc3-Scc1 gate.
We show that displacement of human cohesin from early mitotic chromosomes requires dissociation of Smc3 from Scc1 but no opening of the other two gates. In contrast, loading of human cohesin onto chromatin in telophase occurs through the Smc1-Smc3 hinge. We propose that the use of differently regula...
A structural basis for kinetochore recruitment of the Ndc80 complex via two distinct centromere receptors.
We present molecular details of Spc24-25 in complex with the histone-fold protein Cnn1/CENP-T illustrating how this connection ultimately links microtubules to chromosomes. The conserved Ndc80 receptor motif of Cnn1 is bound as an α helix in a hydrophobic cleft at the interface between Spc24 and Spc...
Novel tricks played by the second messenger c-di-GMP in bacterial biofilm formation.
Long non-coding RNA gadd7 interacts with TDP-43 and regulates Cdk6 mRNA decay.
We show that growth-arrested DNA damage-inducible gene 7 (gadd7), a DNA damage-inducible lncRNA, regulates the G1/S checkpoint in response to UV irradiation. Interestingly, UV-induced gadd7 directly binds to TAR DNA-binding protein (TDP-43) and interferes with the interaction between TDP-43 and cycl...
End-binding protein 1 controls signal propagation from the T cell receptor.
We show that T cell activation requires the growth of MTs mediated by the plus-end specific protein end-binding 1 (EB1). A direct interaction of the T cell receptor (TCR) complex with EB1 provides the molecular basis for EB1 activity promoting TCR encounter with signalling vesicles at the IS. EB1 kn...