{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\n CHMP5 is a multifunctional ESCRT‐III component that contributes to several key cellular processes. Its critical role in endosomal maturation is underscored by studies showing that deletion of CHMP5 in mice leads to enlarged late endosomal compartments that accumulate undigested cargo and exhibit impaired trafficking to lysosomes, thereby enhancing receptor‐mediated signaling."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": " In the context of membrane remodeling and viral budding, CHMP5 participates in the regulation of VPS4 activity by engaging with the LIP5 protein; for example, ISG15 conjugation to CHMP5 disrupts LIP5’s association with VPS4, thereby impeding the formation of the ESCRT‐III–VPS4 complex necessary for membrane scission."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "2", "end_ref": "5"}]}, {"type": "t", "text": " In addition, depletion of CHMP5 has been linked to defects in cell division—specifically, a reduction in centrosome integrity and the generation of monopolar spindles that culminate in chromosome segregation errors."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "6"}]}, {"type": "t", "text": " Beyond its roles in membrane trafficking and mitosis, CHMP5 also modulates intracellular signaling pathways: in osteoclasts, it works in concert with VCP/p97 to stabilize the NF-κB inhibitor IκBα, thereby tempering RANKL-induced NF-κB activation and preventing excessive bone turnover."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "7"}]}, {"type": "t", "text": " Furthermore, CHMP5 is essential for T-cell development as it sets thresholds for T cell receptor signaling, promoting thymocyte survival through mechanisms that include the stabilization of pro-survival factors such as Bcl-2."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "8"}]}, {"type": "t", "text": " Finally, its differential expression in clinical samples—for instance, altered levels in non-lesional psoriasis skin—suggest that CHMP5 may contribute to broader aspects of cellular homeostasis and disease pathology."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "9"}]}, {"type": "t", "text": "\n "}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Jae-Hyuck Shim, Changchun Xiao, Matthew S Hayden, et al. 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