... proteins use their BTB ⁄ POZ domain to interactwith the cullins CUL3A and CUL3B [3,4,16], we inves-tigated what kind of protein–protein interactions werefacilitated by their MATH domains by ... withCUL3 and other BTB proteins [2,16], it remains unclearwhat kind of interactions are mediated by the MATHdomain in plants. In this article, we show that the MATH domain of BPM proteins is ... forming eight b-sheets [23]. The motifwas noted on the basis of homology with the C-terminalregion of meprins A and B and the TRAF-C domain, and, like the BTB domain, facilitates protein–proteininteraction...