Article ; Online: KH-like Domains in PARP9/DTX3L and PARP14 Coordinate Protein-Protein Interactions to Promote Cancer Cell Survival.
2024 Volume 436, Issue 4, Page(s) 168434
Abstract: Certain members of the ADP-ribosyltransferase superfamily (ARTD or PARP enzymes) catalyse ADP-ribosylation in response to cellular stress, DNA damage and viral infection and are upregulated in various tumours. PARP9, its binding partner DTX3L and PARP14 ... ...
Abstract | Certain members of the ADP-ribosyltransferase superfamily (ARTD or PARP enzymes) catalyse ADP-ribosylation in response to cellular stress, DNA damage and viral infection and are upregulated in various tumours. PARP9, its binding partner DTX3L and PARP14 protein levels are significantly correlated in head and neck squamous cell carcinoma (HNSCC) and other tumour types though a mechanism where PARP9/DTX3L regulates PARP14 post-transcriptionally. Depleting PARP9, DTX3L or PARP14 expression in HNSCC or HeLa cell lines decreases cell survival through a reduction of proliferation and an increase in apoptosis. A partial rescue of survival was achieved by expressing a PARP14 truncation containing a predicted eukaryotic type I KH domain. KH-like domains were also found in PARP9 and in DTX3L and contributed to protein-protein interactions between PARP9-DTX3L and PARP14-DTX3L. Homodimerization of DTX3L was also coordinated by a KH-like domain and was disrupted by site-specific mutation. Although, cell survival promoted by PARP14 did not require ADP-ribosyltransferase activity, interaction of DTX3L in vitro suppressed PARP14 auto-ADP-ribosylation and promoted trans-ADP-ribosylation of PARP9 and DTX3L. In summary, we characterised PARP9-DTX3L-PARP14 interactions important to pro-survival signalling in HNSCC cells, albeit in PARP14 catalytically independent fashion. |
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MeSH term(s) | Humans ; Cell Survival ; Head and Neck Neoplasms/enzymology ; Head and Neck Neoplasms/pathology ; HeLa Cells ; Neoplasm Proteins/chemistry ; Poly(ADP-ribose) Polymerases/chemistry ; Squamous Cell Carcinoma of Head and Neck/enzymology ; Squamous Cell Carcinoma of Head and Neck/pathology ; Ubiquitin-Protein Ligases/chemistry ; Protein Domains |
Chemical Substances | DTX3L protein, human (EC 2.3.2.27) ; Neoplasm Proteins ; PARP14 protein, human (EC 2.4.2.30) ; PARP9 protein, human ; Poly(ADP-ribose) Polymerases (EC 2.4.2.30) ; Ubiquitin-Protein Ligases (EC 2.3.2.27) |
Language | English |
Publishing date | 2024-01-03 |
Publishing country | Netherlands |
Document type | Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, N.I.H., Extramural |
ZDB-ID | 80229-3 |
ISSN | 1089-8638 ; 0022-2836 |
ISSN (online) | 1089-8638 |
ISSN | 0022-2836 |
DOI | 10.1016/j.jmb.2023.168434 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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