May regulate the interaction between the 3M complex and the histone deacetylases HDAC4 and HDAC5 (By similarity). May also regulate LRP2/megalin (PubMed:11095640). Interacts (via ANK repeats) with CCDC8 (via PxLPxI/L motif); mediates the interaction with the 3M complex which is composed of CCDC8, CUL7 and OBSL1. Interacts (via ANK repeats) with HDAC4 (via PxLPxI/L motif). Interacts (via ANK repeats) with HDAC5 (via PxLPxI/L motif) (By similarity). Interacts (via ANK repeats) with LRP2/megalin (via PxLPxI/L motif) (PubMed:11095640). Interacts (via ANK repeats) with RFX7 (via PxLPxI/L motif) (By similarity). Interacts with AHRR (PubMed:17949687). Interacts with NEK6 (By similarity). The ankyrin repeats, mainly ANK 2, ANK 3 and ANK 4, mediate interaction with a wide array of PxLPxI/L motif-containing proteins including HDAC4 and LRP2. The PxLPxI/L motif of interactors can contain a Ser or a Thr residue in position 2, which phosphorylation prevents the interaction with ANKRA2.