Category Archives: Ubiquitination

Adenovirus’s epigenetic power to reprogram cells goes beyond its ability to cause tumorous replication — G.J. Fonseca and colleagues at the Western University of Ontario report in the new Cell Host & Microbe that it’s also able to sabotage the interferon response, which usually functions as a first line of defense in infected cells. In an April post, I interviewed Roberto Ferrari about adenovirus research and its ability to push cells back into active tumor-like replication, so I thought this bit of news was an interesting incremental step in overall knowledge of how invaders — particularly adenovirus — use epigenetics against us. What a bunch of jerks! In particular, Fonseca and colleagues used a yeast two-hybrid screen to find out … Continue reading

Posted in Chromatin Structure, Gene Regulation, Histone Modifications, Histones, Microbial Epigenetics, Ubiquitination, Virology | Tagged , , , , | Leave a comment

Here’s an epigenetics first. It turns out that intermolecular signaling in epigenetics — all that ubiquination, methylation, and so forth — doesn’t always end at DNA or histones, where those two components go on just to regulate genes (or to encourage more modification of themselves and each other). Nope, John Latham and colleagues at the University of Texas M.D. Anderson Cancer Center reported in Cell last week that there’s at least one case — in yeast — in which a modified histone allows a non-histone protein to methylate another non-histone protein. That is, the signal travels from the Paf1 complex, to histone H2BK123 by ubiquination, to the COMPASS complex — which needs that ubiquination to di-methylate Dam1. (It’s far more … Continue reading

Posted in Applications, Chromatin Structure, DNA Methylation, Gene Regulation, Histone Modifications, Methylation, Methyltransferases, Phosphorylation, Ubiquitination | Tagged , , | Leave a comment