This is the C-terminal domains found in members of the Deltex family of proteins which comprises five members (DTX1, 2, 3, 4, and 3L). This conserved C-terminal region of about 150 residues of the Deltex family, is preceded by a RING E3 ligase domain in four of the members. Crystal structure of the Deltex C-terminal (DTC) domain reveals a fold composed of a central beta-sheet lined with two long parallel alpha-helices [1].

1: Fold of the conserved DTC domain in Deltex proteins. Obiero J, Walker JR, Dhe-Paganon S; Proteins. 2012;80:1495-1499. PMID:22411408