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JustinA posted in Plaques appear on spot test, don't appear in titer
Viknesh Sivanathan posted in Plaques appear on spot test, don't appear in titer
JustinA posted in Plaques appear on spot test, don't appear in titer
Viknesh Sivanathan posted in Plaques appear on spot test, don't appear in titer
RyanWheeler posted in Plaques appear on spot test, don't appear in titer
2 Repressors in 1 phage genome
Link to this post | posted 08 Aug, 2023 13:24 | |
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The immunity repressor (pham 99175) from cluster A is present in other cluster genomes along with their own cluster specific immunity repressor– specifically C1 (LittleE) , K (, and F1(DLane), CA (Phrankenstein), J(Courthouse), and K (SamScheppers). Graham described this “immunity theft” in Pope et al 2011 in PLoS One https://pubmed.ncbi.nlm.nih.gov/21298013/ From Rick Pollenz: Some of the cluster F1 (and the others Debbie mentioned) have TWO “immunity repressors”, one that is grouped to those mostly from cluster A (Pham 99175) and a second one that is specific to the cluster phage. These rogue one is typically found in a set of 2-3 reverse genes upstream of the integrase. The 2nd repressor is found downstream of the integrase in a 2nd set of reverse genes and groups to a different PHAM. Both sets of reverse genes are on during lysogeny and this is nicely illustrated in the RNA seq figure 4 for phage Fruitloop in the gp52 Wag paper (https://onlinelibrary.wiley.com/doi/10.1111/mmi.13946) where gp37 is the “rogue” hetroimmunity repressor and gp44 is the putative immunity repressor. |