... found in the FAD49 PXdomain, as in many PX domains, suggesting that the PX domain could bind to an SH3 domain of FAD49.To test whether the PX domain could interact with anSH3 domain in FAD49, ... lipid-binding activity of the PX domain in the resting state; phosphorylation of p47phoxreleases the binding, resulting in the active state,i.e. open conformation [25,35,36].As FAD49 contains ... PXdomain to phosphoinositides might be regulated by the interaction between the PX domain and the third SH3domain, as in p47phox, although whether the interaction of the PX domain with the third...