NF-κB signalling protein NEMO is the first physiological substrate for linear head-to-tail polyubiquitin chains. The heterodimeric ubiquitin ligase LUBAC catalyses the reaction and mice lacking a LUBAC subunit show defects in NF-κB signalling.
- Fuminori Tokunaga
- Shin-ichi Sakata
- Kazuhiro Iwai