Reposted by Dmitry Sutormin
Chromatin structure controls defense island expression!
Why do some systems defend on plasmids but fail natively? H-NS is key. Removing it boosts defense and overcomes anti-defense proteins but raises toxicity. Common lab strains still hide novel immunity modules!
www.biorxiv.org/content/10.6...
biorxiv.org
H-NS silences antiviral immunity through 3D chromatin compaction
Bacterial antiviral immunity systems can be toxic to their hosts and must be tightly regulated. Immunity genes are often encoded by AT-rich mobile genetic elements subjected to silencing by nucleoid b...