This domain is found in the mammalian Death domain-associated protein 6 (DAXX) and in similar proteins from animals. DAXX is a transcription corepressor and a histone chaperone that shows specificity for the conserved histone H3.3. This entry represents the histone binding domain, which adopts an all alpha-helical fold where the first two alpha-helices form a coiled coil [1,2].

1: DAXX envelops a histone H3.3-H4 dimer for H3.3-specific recognition. Elsasser SJ, Huang H, Lewis PW, Chin JW, Allis CD, Patel DJ; Nature. 2012;491:560-565. PMID:23075851

2: Structure of the variant histone H3.3-H4 heterodimer in complex with its chaperone DAXX. Liu CP, Xiong C, Wang M, Yu Z, Yang N, Chen P, Zhang Z, Li G, Xu RM; Nat Struct Mol Biol. 2012;19:1287-1292. PMID:23142979