Acts as an accessory subunit for the core Polycomb repressive complex 2 (PRC2), which mediates histone H3K27 (H3K27me3) trimethylation on chromatin leading to transcriptional repression of the affected target gene. Plays a role in nucleosome localization of the PRC2 complex. Self-associates. Associates with the PRC2 complex, which consists of the core components EED, EZH1 or EZH2, SUZ12, and RBBP4, and various combinations of accessory subunits including AEBP2, JARID2, PHF19, MTF2 and EPOP. Found in a monomeric PRC2.2 (class 2) complex consisting of at least SUZ12, RBBP4, AEBP2 and JARID2. Within the PRC2 complex, interacts directly with SUZ12; competes with PHF19 for SUZ12 binding. Interacts with EED, EZH2, and RBBP4. May also interact with RBBP7. Localizes to chromatin as part of the PRC2 complex. Belongs to the AEBP2/jing C2H2-type zinc-finger family.