DTX3L is a RING-domain E3 ubiquitin-protein ligase that regulates endosomal sorting of the G protein-coupled receptor CXCR4 from endosomes to lysosomes []. It also regulates subcellular localization of its partner protein, B aggressive lymphoma (BAL), by a dynamic nucleocytoplasmic trafficking mechanism [, }. DTX3L has a unique N terminus, but lacks the highly basic N-terminal motif and the central proline-rich motif present in other Deltex (DTX) family members, such as DTX1, DTX2, and DTX4. Moreover, its C-terminal region is highly homologous to DTX3. It includes a C3HC4-type RING-HC finger, and a previously unidentified C-terminal domain. DTX3L can associate with DTX1 through its unique N terminus and further enhance self-ubiquitination [].
The deltex family of proteins is involved in the regulation of Notch signaling, and therefore may play roles in cell-to-cell communications that regulate mechanisms determining cell fate []. They have a central RING-type zinc finger domain and contain a C-terminal domain that is also found inother domain architectures. Deltex-1 (DTX1) contains a RING finger and two WWE domains, indicating that it may be an E3 ubiquitin ligase []. Human deltex 3-like, which contains an additional N-terminal domain (presumably with ubiquitin ligase activity) is also described as E3 ubiquitin-protein ligase DTX3L, B-lymphoma- and BAL-associated protein (BBAP), or rhysin-2. DTX3L mediates monoubiquitination of K91 of histone H4 in response to DNA damage [, ].
The deltex family of proteins is involved in the regulation of Notch signaling, and therefore may play roles in cell-to-cell communications that regulate mechanisms determining cell fate []. They have a central RING-type zinc finger domain and contain a C-terminal domain that is also found in other domain architectures. Deltex-1 (DTX1) contains a RING finger and two WWE domains, indicating that it may be an E3 ubiquitin ligase []. Human deltex 3-like, which contains an additional N-terminal domain (presumably with ubiquitin ligase activity) is also described as E3 ubiquitin-protein ligase DTX3L, B-lymphoma- and BAL-associated protein (BBAP), or rhysin-2. DTX3L mediates monoubiquitination of K91 of histone H4 in response to DNA damage [, ].This entry represents the C-terminal domain of the Deltex proteins.
The deltex family of proteins is involved in the regulation of Notch signaling, and therefore may play roles in cell-to-cell communications that regulate mechanisms determining cell fate []. They have a central RING-type zinc finger domain and contain a C-terminal domain that is also found in other domain architectures. Deltex-1 (DTX1) contains a RING finger and two WWE domains, indicating that it may be an E3 ubiquitin ligase []. Human deltex 3-like, which contains an additional N-terminal domain (presumably with ubiquitin ligase activity) is also described as E3 ubiquitin-protein ligase DTX3L, B-lymphoma- and BAL-associated protein (BBAP), or rhysin-2. DTX3L mediates monoubiquitination of K91 of histone H4 in response to DNA damage [, ].This entry represents the C-terminal domain of the Deltex proteins. It contains a fold composed of central β-sheet lined with two long parallel α-helices [].
