May control the transcriptional activity of MYC. Stimulates the activation of E box-dependent transcription by MYC. Binds via its C-terminal region to the N-terminal region of MYC. Associates with AKAP1/S-AKAP84. Interacts with MYCBPAP. Interacts with CFAP91 (PubMed:12223483). Translocates into the nucleus in the S phase of the cell cycle upon an increase of MYC expression. Found in the mitochondria when associated with AKAP1. Highly expressed in heart, placenta, pancreas, skeletal muscle and kidney. Also present at low levels in lung. Belongs to the AMY1 family.