A human-specific cytotoxic neopeptide generated by the deafness gene <i>Cingulin</i>

Yuhang Huang; Linqing Zhang; Yuecen Sun; Qing Liu; Jie Chen; Xiaoyun Qian; Xia Gao; Guang-Jie Zhu; Guoqiang Wan

doi:10.1016/j.jgg.2024.07.017

Volume 51 Issue 11

Nov. 2024

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Article Navigation > Journal of Genetics and Genomics > 2024 > 51(11): 1215-1227

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A human-specific cytotoxic neopeptide generated by the deafness gene Cingulin

doi: 10.1016/j.jgg.2024.07.017

Yuhang Huang^a,b,
Linqing Zhang^a,b,
Yuecen Sun^a,b,
Qing Liu^a,b,c,
Jie Chen^a,c,
Xiaoyun Qian^a,c,
Xia Gao^a,c,
Guang-Jie Zhu^a,c,
Guoqiang Wan^a,b,c

a. MOE Key Laboratory of Model Animal for Disease Study, Department of Otolaryngology Head and Neck Surgery, Jiangsu Provincial Key Medical Discipline (Laboratory), The Affiliated Drum Tower Hospital of Medical School, Model Animal Research Center of Medical School, Nanjing University, Nanjing, Jiangsu 210061, China;
b. Jiangsu Key Laboratory of Molecular Medicine and National Resource Center for Mutant Mice of China, Nanjing University, Nanjing, Jiangsu 210061, China;
c. Research Institute of Otolaryngology, No. 321 Zhongshan Road, Nanjing, Jiangsu 210061, China

Funds:

This work is supported by the National Natural Science Foundation of China (82171136 and 92368110 to G.W., 82201291 to G.-J.Z., 82171145 to X.Q., 81870721 to J.C., and 81970884 and 82192862 to X.G.), Natural Science Foundation of Jiangsu Province (BK20220189 to G.-J.Z. and BK20220188 to Q.L.), Special Foundation for Health Science and Technology Development of Nanjing (YKK21109 to G.-J.Z.), and the Clinical Research Foundation of Drum Tower Hospital affiliated to Nanjing University Medical School (2021-LCYJ-PY-04 to G.-J.Z.).

Received Date: 2024-05-23
Accepted Date: 2024-07-26
Rev Recd Date: 2024-07-22

Available Online: 2025-06-06

Publish Date: 2024-08-05

Abstract

Abstract

Accumulation of mutant proteins in cells can induce proteinopathies and cause functional damage to organs. Recently, the Cingulin (CGN) protein has been shown to maintain the morphology of cuticular plates of inner ear hair cells and a frameshift mutation in CGN causes autosomal dominant non-syndromic hearing loss. Here, we find that the mutant CGN proteins form insoluble aggregates which accumulate intracellularly and lead to cell death. Expression of the mutant CGN in the inner ear results in severe hair cell death and hearing loss in mice, resembling the auditory phenotype in human patients. Interestingly, a human-specific residue (V1112) in the neopeptide generated by the frameshift mutation is critical for the aggregation and cytotoxicity of the mutant human CGN. Moreover, the expression of heat shock factor 1 (HSF1) decreases the accumulation of insoluble mutant CGN aggregates and rescues cell death. In summary, these findings identify mutant-specific toxic polypeptides as a disease-causing mechanism of the deafness mutation in CGN, which can be targeted by the expression of the cell chaperone response regulator HSF1.
- Proteinopathy,
- Aggregate,
- Neopeptide,
- Cell death,
- Cingulin,
- Hearing loss

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References(53)

References

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