{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nThe PKL12/STK16 protein, a conserved serine/threonine kinase, displays a dynamic subcellular localization pattern. Under normal conditions, it is predominantly associated with the Golgi apparatus, but when Golgi integrity is disrupted—either by pharmacologic agents like brefeldin A or nocodazole, or through its constitutive overexpression—it redistributes into the nuclear compartment. Notably, these localization shifts occur independently of its kinase activity, suggesting that STK16 may have non-catalytic roles in cellular regulation."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nFunctionally, overexpression of STK16 is associated with an enhanced capacity of cells to produce and secrete vascular endothelial growth factor (VEGF), a key mediator of angiogenesis. In vivo experiments further support these findings; tumor cells engineered to overexpress STK16 form larger tumors characterized by increased blood vessel formation in immunodeficient mice. This link between STK16 expression and angiogenesis underscores its potential role as a transcriptional co-activator that connects intracellular trafficking with genes involved in vascular growth."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nAlthough the original query mentions TNFSF12–TNFSF13, the provided abstract does not directly address these tumor necrosis factor superfamily members. Instead, it focuses on STK16’s multifunctional role in regulating subcellular dynamics and promoting angiogenic signaling through increased VEGF production. This study thereby offers insights into mechanisms by which proteins can impact both trafficking processes and gene regulatory networks, with potential implications for tumorigenesis and vascular biology."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": ""}]}]}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Bárbara Guinea, José Manuel Ligos, Teresa Laín de Lera, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Nucleocytoplasmic shuttling of STK16 (PKL12), a Golgi-resident serine/threonine kinase involved in VEGF expression regulation."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Exp Cell Res (2006)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1016/j.yexcr.2005.10.010"}], "href": "https://doi.org/10.1016/j.yexcr.2005.10.010"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "16310770"}], "href": "https://pubmed.ncbi.nlm.nih.gov/16310770"}]}]}]}