{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\n LHFPL5 is a tetraspan membrane protein that is an essential component of the mechanotransduction machinery in inner‐ear hair cells. It functions primarily by coupling the extracellular tip link, formed in part by protocadherin 15, to the ion channel complex. In particular, LHFPL5 interacts with both PCDH15 and TMIE to form a ternary complex that efficiently links tip‐link tension to the gating of the mechanoelectrical transducer (MET) channel (see, for example"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": "and."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "2"}]}, {"type": "t", "text": " This coupling is critical for the rapid and precise conversion of mechanical stimuli (such as sound and head movement) into electrical signals."}]}, {"type": "t", "text": "\n \n "}, {"type": "p", "children": [{"type": "t", "text": "\n Developmental studies have demonstrated that during early stereocilia bundle formation LHFPL5 is broadly distributed, but its localization becomes progressively refined to the tips of mature, shorter stereocilia where MET channels are active."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "3"}]}, {"type": "t", "text": " Moreover, biochemical and single‐molecule analyses reveal that LHFPL5 not only stabilizes TMC1—the pore-forming candidate subunit of the MET channel—but also ensures the proper assembly and trafficking of the transduction complex."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "4"}]}, {"type": "t", "text": ""}]}, {"type": "t", "text": "\n \n "}, {"type": "p", "children": [{"type": "t", "text": "\n Genetic studies further underscore the importance of LHFPL5: mutations in this gene are associated with autosomal recessive nonsyndromic hearing loss. For instance, mutant alleles of LHFPL5 (historically referred to as TMHS) disrupt tip link assembly and alter MET channel properties, which in turn lead to defective sound transduction."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "5", "end_ref": "7"}]}, {"type": "t", "text": " Recent work also suggests that alternative splicing of LHFPL5 further contributes to the molecular diversity of the MET complex"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "8"}]}, {"type": "t", "text": ", and that stabilizing its expression may be a critical factor in effective gene therapy approaches for hearing restoration."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "9"}]}, {"type": "t", "text": "\n "}]}, {"type": "t", "text": "\n \n "}, {"type": "p", "children": [{"type": "t", "text": "\n Together, these findings indicate that LHFPL5 plays a dual role: it both ensures the physical coupling of tip links to the MET channel and modulates channel assembly and function, thereby underpinning normal auditory mechanotransduction. Disruption of LHFPL5 function leads to maladaptive mechanotransduction and is a direct cause of hereditary hearing loss.\n "}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Bo Zhao, Zizhen Wu, Nicolas Grillet, et al. "}, {"type": "b", "children": [{"type": "t", "text": "TMIE is an essential component of the mechanotransduction machinery of cochlear hair cells."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Neuron (2014)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1016/j.neuron.2014.10.041"}], "href": "https://doi.org/10.1016/j.neuron.2014.10.041"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "25467981"}], "href": "https://pubmed.ncbi.nlm.nih.gov/25467981"}]}, {"type": "r", "ref": 2, "children": [{"type": "t", "text": "Jingpeng Ge, Johannes Elferich, April Goehring, et al. 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