Evidence map›Paper›PMID 40397273›Full record

ArticleMolecular biology reports2025

Phenotypic and molecular characterization of a recurrent SPTAN1 mutation causing SPG91.

Shih-Chun Lan, Ming-Der Perng, Yung-Yee Chang, Ying-Fa Chen, Min-Yu Lan

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Article in Molecular biology reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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4 · The record

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5 · Who and what money

Authors and funding

5 authors.

Shih-Chun LanSchool of Medicine, National Taiwan University College of Medicine, Taipei, Taiwan.ORCID http://orcid.org/0000-0002-8175-4933
Ming-Der PerngInstitute of Molecular Medicine, National Tsing Hua University, Hsinchu, Taiwan.ORCID http://orcid.org/0000-0002-1884-3714
Yung-Yee ChangDepartment of Neurology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan.ORCID http://orcid.org/0000-0001-6840-8537
Ying-Fa ChenDepartment of Neurology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan.ORCID http://orcid.org/0000-0001-5604-6962
Min-Yu LanDepartment of Neurology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan. myl@ksts.seed.net.tw.ORCID http://orcid.org/0000-0001-7361-8475

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundSpectrins are ubiquitous cytoskeleton proteins found in all metazoan cells. αII-spectrin, encoded by SPTAN1, is the pivotal protein responsible for organization of the axonal cytoskeleton. Monoallelic SPTAN1 mutations cause various inherited neurological diseases, including spastic paraplegia 91 (SPG91), a type of hereditary spastic paraplegia (HSP). METHODS AND

resultsWe reported two patients with SPG91 caused by the SPTAN1 mutation c.55 C > T (p.Arg19Trp), who presented with lower limb spasticity and polyneuropathy. An analysis of the patients reported in the literature in addition to the present patients revealed that SPTAN1 p.Arg19Trp was specific for an HSP phenotype, with 35% of the combined patients with sensory‒motor polyneuropathy and 30% with cerebellar ataxia. In computational simulations, this variant was predicted to perturb the stability of αII/β spectrin heterotetramerization but did not destabilize the tetramerization domain of αII-spectrin.

conclusionsOur findings on genotype‒phenotype correlations and genetic effects on molecular characteristics may provide important insights into the exploration of αII-spectrin-related neurological diseases.

Indexed as

Spastic Paraplegia, HereditarySpectrinGenetic Association StudiesHumansMutationPedigreePhenotypeSpectrinHereditary spastic paraplegiaMembrane periodic skeletonProtein‒protein interactionSpectrin heterotetramerSPG91αII-spectrin

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