DTX3L is a RING-domain E3 ubiquitin-protein ligase that regulates endosomal sorting of the G protein-coupled receptor CXCR4 from endosomes to lysosomes [1]. It also regulates subcellular localization of its partner protein, B aggressive lymphoma (BAL), by a dynamic nucleocytoplasmic trafficking mechanism [2,3]. This entry represents a domain found towards the N-terminal of DTX3L, whose function is unknown. According to structure predictions (AlphaFold), it may adopt a beta-alpha-beta-beta-alpha conformation, similar to Smr domains.

1: The ubiquitin ligase deltex-3l regulates endosomal sorting of the G protein-coupled receptor CXCR4. Holleman J, Marchese A; Mol Biol Cell. 2014;25:1892-1904. PMID:24790097

2: The BAL-binding protein BBAP and related Deltex family members exhibit ubiquitin-protein isopeptide ligase activity. Takeyama K, Aguiar RC, Gu L, He C, Freeman GJ, Kutok JL, Aster JC, Shipp MA; J Biol Chem. 2003;278:21930-21937. PMID:12670957

3: BAL1 and BBAP are regulated by a gamma interferon-responsive bidirectional promoter and are overexpressed in diffuse large B-cell lymphomas with a prominent inflammatory infiltrate. Juszczynski P, Kutok JL, Li C, Mitra J, Aguiar RC, Shipp MA; Mol Cell Biol. 2006;26:5348-5359. PMID:16809771

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