HACE1: Proteins and Enzymes

The HACE1 gene codes for a E3 ubiquitin-protein ligase HACE1 that is a participant in Golgi membrane fusion as well as in regulation of small GTPases to mediate ubiquitination and degradation of active RAC1, working in defense against pathogens. This protein may also play a role as a transcription regulator through its interaction with RARB. HACE1 exists in four isoforms: isoform 1 is 909 amino acids long, 102 kDA; isoform 2 is 318 amino acids long, 35 kDA; isoform 3 is 562 amino acids long, 63 kDA; isoform 4 is 694 amino acids long, nearly 78 kDA. HACE1 has been researched in regards to celiac disease, malaria, colorectal cancer, wilms tumors, and carcinoma. It is involved in the SMAD signaling network as well as ubiquitin-proteasome dependent proteolysis and has been known to interact with genes RARA, RAB4A, RAC1, PLXNA2, and IRF7.