Wnt/Beta-catenin signaling and ARTD family members (WP5529)
Homo sapiens
Positive regulation Tankyrase 1 and Tankyrase 2 (PARP5a/b or ARTD5/6) play key roles in regulating telomere length, centrosome maturation, proteasome assembly, and the formation of the mitotic spindle. Interestingly, Tankyrase 1/2 also appear to regulate β-catenin stability, and consequently, active Wnt signaling, as the deletion of both Tankyrase 1 and 2 leads to early embryonic lethality in mice. In this context, inhibiting Tankyrase 1/2 destabilizes β-catenin by promoting Axin stability, which in turn reduces the growth of β-catenin-dependent colorectal cancer cells. GSK3 kinase activity is a critical suppressor of β-catenin stability, and this activity is negatively regulated by mono-ADP-ribosylation mediated by PARP10, which results in elevated β-catenin levels. Moreover, PLK1 promotes β-catenin destabilization and is mono-ADP-ribosylated by PARP10. This modification of PLK1 significantly diminishes its enzymatic activity, suggesting a potential secondary mechanism through which PARP10 may enhance β-catenin stability. PARP1 enhances Wnt target gene expression in both APC-deficient familial and sporadic colorectal cancer (CRC) by acting as a co-factor of TCF-4/β-catenin. In contrast, Ku70 has been shown to bind to TCF-4/β-catenin and inhibit TCF/LEF function. In colon cancer, overexpression of PARP1 is commonly observed, indicating its supportive role in β-catenin transcriptional activity. Negative regulation As of 2021, no evidence has been reported for negative regulation of Wnt signaling by ARTD family members.
Authors
Eric WeitzActivity
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Organisms
Homo sapiensCommunities
Annotations
Pathway Ontology
Wnt signaling pathwayDisease Ontology
colon cancer colorectal cancerLabel | Type | Compact URI | Comment |
---|---|---|---|
AXIN1 | GeneProduct | ensembl:ENSG00000103126 | 'Axin' in source |
APC | GeneProduct | ensembl:ENSG00000134982 | |
TNK1 | GeneProduct | ensembl:ENSG00000174292 | |
PARP10 | GeneProduct | ensembl:ENSG00000178685 | |
PLK1 | GeneProduct | ensembl:ENSG00000166851 | |
PARP1 | GeneProduct | ensembl:ENSG00000143799 | |
TNK2 | GeneProduct | ensembl:ENSG00000061938 | |
CTNNB1 | GeneProduct | ensembl:ENSG00000168036 | 'b-catenin' in source |
DVL1 | GeneProduct | ensembl:ENSG00000107404 | 'Dishevelled' in source |
DVL2 | GeneProduct | ensembl:ENSG00000004975 | 'Dishevelled' in source |
DVL3 | GeneProduct | ensembl:ENSG00000161202 | 'Dishevelled' in source |
RBX1 | GeneProduct | ensembl:ENSG00000100387 | |
SKP1 | GeneProduct | ensembl:ENSG00000113558 | |
CUL1 | GeneProduct | ensembl:ENSG00000055130 | |
BTRC | GeneProduct | ensembl:ENSG00000166167 | |
LRP5 | GeneProduct | ensembl:ENSG00000174292 | |
LRP6 | GeneProduct | ensembl:ENSG00000174292 |
References
- Interplay between ADP-ribosyltransferases and essential cell signaling pathways controls cellular responses. Boehi F, Manetsch P, Hottiger MO. Cell Discov. 2021 Nov 2;7(1):104. PubMed Europe PMC Scholia