{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nAlthough SNORD36C is classically defined as a small nucleolar RNA involved in the chemical modification of ribosomal RNA, none of the provided abstracts describe its function. Instead, these studies focus on the diverse roles of intersectin proteins (particularly ITSN1 and its isoforms) as multidomain scaffolds that orchestrate endocytic trafficking and associated signaling pathways. In neuronal and other cell types, ITSN1 has been shown to regulate key steps of clathrin‐mediated endocytosis, vesicle recycling, and exocytosis, thereby influencing neurotransmitter release, intracellular receptor trafficking, and even neuroprotective as well as synaptic plasticity mechanisms."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nAdditional studies reveal that intersectin proteins also act as platforms that integrate signaling cascades with membrane trafficking. Through direct interactions with proteins such as dynamin, Cdc42 regulators, and class II phosphoinositide 3'-kinase, ITSN1 not only modulates vesicle dynamics but also governs cellular survival pathways, synaptic vesicle replenishment, and even the formation of interhemispheric neuronal connections. Alternative splicing and differential intra‐domain interactions further diversify ITSN1’s roles in synaptic function and neuronal migration, with implications for neurological disorders including epilepsy and Alzheimer’s disease."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "3", "end_ref": "7"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nIntersectin proteins also contribute to receptor regulation and intracellular signal modulation. For example, ITSN1 enhances the ubiquitylation and lysosomal degradation of receptor tyrosine kinases such as EGFR by modulating the interactions between the E3 ubiquitin ligase Cbl and its inhibitors (e.g. Sprouty2), a mechanism further fine‐tuned by the recruitment of the Shp2 phosphatase. Moreover, regulation by microRNAs—exemplified by miR-194 targeting ITSN1—demonstrates how intersectin levels can indirectly affect membrane channel activity and cellular excitability in non-neuronal tissues."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "8", "end_ref": "10"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nFinally, the broad physiological importance of intersectin proteins is underscored by studies linking ITSN1 dysfunction to diverse pathological states, ranging from pulmonary arterial hypertension and vascular remodeling to altered heart and brain proteomes associated with neurodegeneration and cognitive deficits. Complementary investigations into the autoregulatory mechanisms of ITSN1 splice variants further illuminate how subtle differences in domain structure govern binding to synaptic partners and dictate cell-specific functional outcomes."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "11", "end_ref": "17"}]}, {"type": "t", "text": "\n"}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Yong Yu, Po-Yin Chu, David N Bowser, et al. 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