Furthermore, a significant fraction of trapped promoters/KRAB docking loci escaped these rules, suggesting other counteracting influences.
The expression pattern of these human genes was then analyzed in this study using mouse models generated through the HuGX method, that is, carrying a single copy of a human BAC MaxiPromoter reporter construct docked at the Hprt locus [ 7].
If the gapmer suppresses saRNA activity - as reported for PR and COX2 by refs 38 and 50 - then RNAa should rather rely on the recruitment of transactivating effectors to the target locus, via ncRNA docks stemming from it.
To circumvent this drawback, heterozygous puromycin-resistant mosquitoes can be crossed to any available line carrying a fluorescent marker docked within the same attP locus, selecting F1 offspring that are both puromycin-resistant and fluorescent.
More work is needed to tease out the dynamics of RelA and PU.1 involvement in the binding of IRF5, but it is highly likely that PU.1 binds first because it functions as a pioneering factor in macrophages (Garber et al., 2012; Ghisletti et al., 2010; Heinz et al., 2010), followed by the binding of RelA at inflammatory gene loci and subsequently docking of IRF5.
Constructs were introduced into the ap locus by RMCE into two docking sites, Mi{y[+mDint2]=MIC}MI02330 (Venken et al. 2011) and ap c1.4b.
Interestingly, in several cases ERβ binds both up- and down-stream of the pre-miR locus, further suggesting that receptor docking might exert multiple regulatory actions on miRNA biogenesis.
To assess dsDNA-mediated HDR, we targeted the DSH3PX1 locus for replacement with an attP docking site.
The vector contains an attP ΦC31 docking site for subsequent modification of the targeted locus and a 3xP3-DsRed marker that drives expression of DsRed in the eye, flanked by loxP recombination sites for its removal.
The replacement of a gene with an attP recombination docking site provides ongoing genetic access to a targeted locus, allowing for an unlimited array of subsequent modifications (Gao et al. 2009; Huang et al. 2009).
