{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nAlthough none of the provided abstracts directly describe SH3BP5L, together they offer a detailed portrait of cyclin C’s multifaceted roles—a profile that may bear conceptual parallels for SH3BP5L if it participates in similar regulatory networks. Several studies report that nuclear cyclin C is a critical transcriptional regulator and a key mediator of cell‐cycle progression. In these contexts, cyclin C partners with different cyclin‐dependent kinases (including CDK19, CDK8, CDK3, and even CDK2) to phosphorylate various substrates such as the Notch1 intracellular domain and the transcription factor LSF. Such phosphorylation events are essential for proper transcriptional reprogramming, maintenance of tumor suppressor activity, and restraint of oncogenic signals, as evidenced by its haploinsufficient tumor suppressor role in T-cell acute lymphoblastic leukemia and thyroid tissues."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "1", "end_ref": "4"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nIn addition to its nuclear functions, cyclin C is indispensable for orchestrating mitochondrial dynamics under stress. Upon oxidative or DNA‐damaging challenges, a fraction of cyclin C relocates from the nucleus to the cytoplasm where it interacts directly with the fission mediator Drp1. This binding enhances Drp1’s GTP affinity and stimulates its GTPase activity, thereby promoting mitochondrial fragmentation—a process closely linked to programmed cell death and cellular adaptation to damage."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "5", "end_ref": "7"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nCyclin C’s influence extends further into the realm of metabolic regulation and cellular differentiation. Studies demonstrate that cyclin C modulates de novo lipogenesis through signaling pathways involving mTORC1 and is crucial for adipocyte development by enhancing the transcriptional activity of C/EBPα. Moreover, spatial promoter analyses hint at a complex regulation of cyclin C expression during embryogenesis, reinforcing its broad physiological significance."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "8", "end_ref": "10"}]}, {"type": "t", "text": "\n"}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Utsav H Saxena, Christina M H Powell, Jill K Fecko, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Phosphorylation by cyclin C/cyclin-dependent kinase 2 following mitogenic stimulation of murine fibroblasts inhibits transcriptional activity of LSF during G1 progression."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Mol Cell Biol (2009)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1128/MCB.00687-08"}], "href": "https://doi.org/10.1128/MCB.00687-08"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "19237534"}], "href": "https://pubmed.ncbi.nlm.nih.gov/19237534"}]}, {"type": "r", "ref": 2, "children": [{"type": "t", "text": "Na Li, Anne Fassl, Joel Chick, et al. 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"}, {"type": "b", "children": [{"type": "t", "text": "Synergistic repression of thyroid hyperplasia by cyclin C and Pten."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "J Cell Sci (2019)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1242/jcs.230029"}], "href": "https://doi.org/10.1242/jcs.230029"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "31331961"}], "href": "https://pubmed.ncbi.nlm.nih.gov/31331961"}]}, {"type": "r", "ref": 4, "children": [{"type": "t", "text": "David C Stieg, Katrina F Cooper, Randy Strich "}, {"type": "b", "children": [{"type": "t", "text": "The extent of cyclin C promoter occupancy directs changes in stress-dependent transcription."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "J Biol Chem (2020)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1074/jbc.RA120.015215"}], "href": "https://doi.org/10.1074/jbc.RA120.015215"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "32934007"}], "href": "https://pubmed.ncbi.nlm.nih.gov/32934007"}]}, {"type": "r", "ref": 5, "children": [{"type": "t", "text": "Kun Wang, Ruilan Yan, Katrina F Cooper, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Cyclin C mediates stress-induced mitochondrial fission and apoptosis."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Mol Biol Cell (2015)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1091/mbc.E14-08-1315"}], "href": "https://doi.org/10.1091/mbc.E14-08-1315"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "25609094"}], "href": "https://pubmed.ncbi.nlm.nih.gov/25609094"}]}, {"type": "r", "ref": 6, "children": [{"type": "t", "text": "Vidyaramanan Ganesan, Stephen D Willis, Kai-Ti Chang, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Cyclin C directly stimulates Drp1 GTP affinity to mediate stress-induced mitochondrial hyperfission."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Mol Biol Cell (2019)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1091/mbc.E18-07-0463"}], "href": "https://doi.org/10.1091/mbc.E18-07-0463"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "30516433"}], "href": "https://pubmed.ncbi.nlm.nih.gov/30516433"}]}, {"type": "r", "ref": 7, "children": [{"type": "t", "text": "Jessica M Ponce, Grace Coen, Kathryn M Spitler, et al. 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