|
| 1 | +--- |
| 2 | +annotations: |
| 3 | +- id: CL:0000182 |
| 4 | + parent: native cell |
| 5 | + type: Cell Type Ontology |
| 6 | + value: hepatocyte |
| 7 | +- id: DOID:5015 |
| 8 | + parent: disease of cellular proliferation |
| 9 | + type: Disease Ontology |
| 10 | + value: fibrolamellar carcinoma |
| 11 | +- id: CL:0001063 |
| 12 | + type: Cell Type Ontology |
| 13 | + value: neoplastic cell |
| 14 | +authors: |
| 15 | +- Eweitz |
| 16 | +citedin: '' |
| 17 | +communities: [] |
| 18 | +description: '"Fibrolamellar carcinoma (FLC) is a liver cancer of adolescents and |
| 19 | + young adults characterized by fusions of the genes encoding the protein kinase A |
| 20 | + catalytic subunit, PRKACA, and heat shock protein, DNAJB1. The chimeric DNAJB1-PRKACA |
| 21 | + protein has increased kinase activity and is essential for FLC xenograft growth.... |
| 22 | + a core function of DNAJB1-PRKACA is the phosphorylation and inactivation of salt-inducible |
| 23 | + kinases (SIKs). This leads to deregulation of the CRTC2 transcriptional coactivator |
| 24 | + and p300 acetyltransferase, resulting in transcriptional reprogramming and increased |
| 25 | + global histone acetylation, driving malignant growth. Our studies establish a central |
| 26 | + oncogenic mechanism of DNAJB1-PRKACA and suggest the potential of targeting CRTC2/p300 |
| 27 | + in FLC. Notably, these findings link this rare cancer’s signature fusion oncoprotein |
| 28 | + to more common cancer gene alterations involving STK11 and GNAS, which also function |
| 29 | + via SIK suppression." Diagram inspired by figure 1H in Gritti, Wan et al. (2025), |
| 30 | + https://pmc.ncbi.nlm.nih.gov/articles/PMC11803398.' |
| 31 | +last-edited: 2025-02-23 |
| 32 | +ndex: null |
| 33 | +organisms: |
| 34 | +- Homo sapiens |
| 35 | +redirect_from: |
| 36 | +- /index.php/Pathway:WP5514 |
| 37 | +- /instance/WP5514 |
| 38 | +- /instance/WP5514_r136808 |
| 39 | +revision: r136808 |
| 40 | +schema-jsonld: |
| 41 | +- '@context': https://schema.org/ |
| 42 | + '@id': https://wikipathways.github.io/pathways/WP5514.html |
| 43 | + '@type': Dataset |
| 44 | + creator: |
| 45 | + '@type': Organization |
| 46 | + name: WikiPathways |
| 47 | + description: '"Fibrolamellar carcinoma (FLC) is a liver cancer of adolescents and |
| 48 | + young adults characterized by fusions of the genes encoding the protein kinase |
| 49 | + A catalytic subunit, PRKACA, and heat shock protein, DNAJB1. The chimeric DNAJB1-PRKACA |
| 50 | + protein has increased kinase activity and is essential for FLC xenograft growth.... |
| 51 | + a core function of DNAJB1-PRKACA is the phosphorylation and inactivation of salt-inducible |
| 52 | + kinases (SIKs). This leads to deregulation of the CRTC2 transcriptional coactivator |
| 53 | + and p300 acetyltransferase, resulting in transcriptional reprogramming and increased |
| 54 | + global histone acetylation, driving malignant growth. Our studies establish a |
| 55 | + central oncogenic mechanism of DNAJB1-PRKACA and suggest the potential of targeting |
| 56 | + CRTC2/p300 in FLC. Notably, these findings link this rare cancer’s signature fusion |
| 57 | + oncoprotein to more common cancer gene alterations involving STK11 and GNAS, which |
| 58 | + also function via SIK suppression." Diagram inspired by figure 1H in Gritti, |
| 59 | + Wan et al. (2025), https://pmc.ncbi.nlm.nih.gov/articles/PMC11803398.' |
| 60 | + keywords: |
| 61 | + - CREB1 |
| 62 | + - CRTC2 |
| 63 | + - DNAJB1 |
| 64 | + - GNAS |
| 65 | + - HDAC4 |
| 66 | + - HDAC5 |
| 67 | + - HDAC7 |
| 68 | + - PRKACA |
| 69 | + - SIK1 |
| 70 | + - SIK2 |
| 71 | + - SIK3 |
| 72 | + license: CC0 |
| 73 | + name: DNAJB1-PRKACA fusion in fibrolamellar liver cancer |
| 74 | +seo: CreativeWork |
| 75 | +title: DNAJB1-PRKACA fusion in fibrolamellar liver cancer |
| 76 | +wpid: WP5514 |
| 77 | +--- |
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