Participates in the regulation of gene transcription (PubMed:8929412, PubMed:16087886, PubMed:24173801, PubMed:24615015, PubMed:25999153, PubMed:25858587). Binds DNA in a non-specific manner, yet also specifically recognizes the core sequence CAC[GA]TG (PubMed:8929412). Seems to activate the transcription of growth-related genes; required for cellular proliferation and growth (PubMed:16087886, PubMed:25999153, PubMed:25858587). Functions in the TORC2-mediated regulation of cell growth, acting downstream of the TORC2 complex (PubMed:25999153). Inhibits the demethylase activity of Lid (PubMed:17311883). Activates transcription of mbm (PubMed:24615015). Has a role in ribosome biogenesis and endoreplication in fat body cells by activating the transcription of LTV1 (PubMed:25858587). Able to induce the SCF E3 ubiquitin-protein ligase member archipelago (ago) which functions in its degradation (PubMed:15182669, PubMed:24173801). It may therefore create a negative feedback loop with ago that is regulated by the ubiquitin hydrolase puf (PubMed:24173801). Efficient DNA binding requires dimerization with another bHLH protein (PubMed:8929412). Binds DNA as a heterodimer with Max (PubMed:8929412). Interacts with ago (PubMed:15182669, PubMed:24173801). Interacts with lid (PubMed:17311883). Part of a complex containing lid, Myc and ash2 (PubMed:17311883). Component of a complex with pont and rept (PubMed:16087886). Interacts with puf (PubMed:24173801). Translocation from the cytoplasm to the nucleus may be promoted by the TORC2 complex (Lst8 and rictor). Low levels detected throughout embryo before cellular blastoderm formation, particularly concentrated in pole plasm. Zygotic expression detected during cellular blastoderm stage in endodermal anlagen of anterior and posterior midgut at both poles. After gastrulation, expression detected in invaginating ventral furrow of mesoderm. Continued expression in anterior and posterior midgut and mesoderm during germband extension. During late germ-band retraction, expression remains detectable in fusing midgut and presumed developing somatic musculature. Expressed both maternally and zygotically in embryos. Probably targeted for ubiquitination by the SFC ubiquitin ligase complex member ago, leading to its proteasomal degradation.