Required for assembly and stability of the aminoacyl-tRNA synthase complex (PubMed:19131329). Mediates ubiquitination and degradation of FUBP1, a transcriptional activator of MYC, leading to MYC down-regulation which is required for aveolar type II cell differentiation. Blocks MDM2-mediated ubiquitination and degradation of p53/TP53. Functions as a proapoptotic factor. . This is the function of Ensembl gene identifier ENSG00000106305 (AIMP2, aminoacyl tRNA synthetase complex interacting multifunctional protein 2).