Plays an indispensable role in the organization of KRT8/KRT18 filaments. Acts as an endogenous molecular chaperone for neuronal proteins including huntingtin. Has a stimulatory effect on the ATPase activity of HSP70 in a dose-dependent and time-dependent manner and hence acts as a co-chaperone of HSP70. Reduces huntingtin aggregation associated with HD. Also reduces cellular toxicity and caspase-3 activity.
Synonyms: DJ4, DnaJ, DNAJ B6, DnaJ homolog subfamily B member 6, DNAJB6, DNJB6_HUMAN, Heat shock protein J2, HHDJ1, HSJ-2, HSJ2, MRJ, MSJ-1, MSJ1.