DnaJ domains (J-domains) are associated with hsp70 heat-shock system and it is thought that this domain mediates the interaction. DnaJ-domain is therefore part of a chaperone (protein folding) system. The T-antigens, although not in Prosite are confirmed as DnaJ containing domains from literature [2].

1: DnaJ-like proteins: molecular chaperones and specific regulators of Hsp70. Cyr DM, Langer T, Douglas MG; Trends Biochem Sci 1994;19:176-181. PMID:8016869

2: Inactivation of pRB-related proteins p130 and p107 mediated by the J domain of simian virus 40 large T antigen. Stubdal H, Zalvide J, Campbell KS, Schweitzer C, Roberts TM, DeCaprio JA; Mol Cell Biol 1997;17:4979-4990. PMID:9271376

3: NMR structure of the J-domain and the Gly/Phe-rich region of the Escherichia coli DnaJ chaperone. Pellecchia M, Szyperski T, Wall D, Georgopoulos C, Wuthrich K; J Mol Biol 1996;260:236-250. PMID:8764403

4: The J-domain family and the recruitment of chaperone power. Kelley WL; Trends Biochem Sci 1998;23:222-227. PMID:9644977