|FUNCTION: Implicated in immunoproteasome assembly and required for efficient antigen processing. The PA28 activator complex enhances the generation of class I binding peptides by altering the cleavage pattern of the proteasome.
* SUBUNIT: HETERODIMER OF PSME1 AND PSME2, WHICH FORMS A HEXADIMERIC RING.
* INDUCTION: BY INTERFERON GAMMA.
* SIMILARITY: BELONGS TO THE PA28 FAMILY.
Last Update 13-Mar-03