SUG2, or Proteasome 26S subunit, ATPase 6, is a human gene encoded by PSMC6. It may also be known as: 26S protease regulatory subunit 10B; Proteasome 26S subunit ATPase 6; Proteasome subunit p42; 26S proteasome AAA-ATPase subunit RPT4; CADP44; HEL-S-73; proteasome (prosome, macropain) 26S subunit, ATPase, 6. The encoded protein has an amino acid length of 389 and a mass of 44.2 kDa. Other isoforms may exist. SUG2 is a member of the AAA ATPase family. Homologs of this gene exist in other organisms, including: Mouse, Rat, Zebrafish, Frog, Chicken.