This family consists of the C terminal region of the DnaJ protein. It is always found associated with Pfam:PF00226 and Pfam:PF00684. DnaJ is a chaperone associated with the Hsp70 heat-shock system involved in protein folding and renaturation after stress. The two C-terminal domains CTDI and CTDII, both incorporated in this family are necessary for maintaining the J-domains in their specific relative positions [2]. Structural analysis of PDB:1nlt shows that PF00684 is nested within this DnaJ C-terminal region [3].

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

2: Central domain deletions affect the SAXS solution structure and function of yeast Hsp40 proteins Sis1 and Ydj1. Silva JC, Borges JC, Cyr DM, Ramos CH, Torriani IL; BMC Struct Biol. 2011;11:40. PMID:22011374

3: The crystal structure of the yeast Hsp40 Ydj1 complexed with its peptide substrate. Li J, Qian X, Sha B; Structure. 2003;11:1475-1483. PMID:14656432