What does this research mean for the field?

Novel compound heterozygous variants in the SIL1 gene (c.570_572delCAA and c.740C>T) are associated with Marinesco-Sjögren syndrome and act by reducing SIL1 abundance and weakening its interaction with BiP. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To characterize novel compound heterozygous variants in the SIL1 gene and clarify their pathogenic mechanisms in Marinesco-Sjögren syndrome.

August 30, 2026Frontiers in GeneticsOpen Access

Novel compound heterozygous SIL1 variants associated with Marinesco-Sjögren syndrome in a Chinese family

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Authors

YJYizheng Jiang ALAojie Lian JGJialing Guo

Discussion

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Overview

Genetic and functional analysis uncovers novel compound heterozygous SIL1 mutations in a pediatric patient, highlighting impaired BiP binding in Marinesco-Sjögren syndrome.

Key Points

To characterize novel compound heterozygous variants in the SIL1 gene and clarify their pathogenic mechanisms in Marinesco-Sjögren syndrome.
Identified candidate variants using whole-exome sequencing and Sanger sequencing in a 6-year-old girl with Marinesco-Sjögren syndrome and her family.
Evaluated SIL1 transcript and protein abundance along with subcellular localization using RNA-seq, RT-qPCR, Western blot, and immunofluorescence.
Investigated protein structural changes and SIL1-BiP binding affinity using computational structural prediction and coimmunoprecipitation assays.
Identified novel compound heterozygous SIL1 variants, c.570_572delCAA (p.Asn190del) and c.740C>T (p.Ala247Val), in the affected patient.
Demonstrated marked reductions in SIL1 mRNA and protein expression driven by the mutant alleles.
Observed weakened binding interactions between the mutated SIL1 protein and the endoplasmic reticulum chaperone BiP.

Cite This Study

Jiang et al. (2026) studied this question.

synapsesocial.com/papers/6a93f00a6c1a8fb52e79c108 https://doi.org/10.3389/fgene.2026.1795147

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August 30, 2026Frontiers in GeneticsOpen Access

Novel compound heterozygous SIL1 variants associated with Marinesco-Sjögren syndrome in a Chinese family

View Full Paper

Ask AI

Bookmark

Authors

YJYizheng Jiang ALAojie Lian JGJialing Guo

Discussion

Member takes

Overview

Genetic and functional analysis uncovers novel compound heterozygous SIL1 mutations in a pediatric patient, highlighting impaired BiP binding in Marinesco-Sjögren syndrome.

Key Points

To characterize novel compound heterozygous variants in the SIL1 gene and clarify their pathogenic mechanisms in Marinesco-Sjögren syndrome.
Identified candidate variants using whole-exome sequencing and Sanger sequencing in a 6-year-old girl with Marinesco-Sjögren syndrome and her family.
Evaluated SIL1 transcript and protein abundance along with subcellular localization using RNA-seq, RT-qPCR, Western blot, and immunofluorescence.
Investigated protein structural changes and SIL1-BiP binding affinity using computational structural prediction and coimmunoprecipitation assays.
Identified novel compound heterozygous SIL1 variants, c.570_572delCAA (p.Asn190del) and c.740C>T (p.Ala247Val), in the affected patient.
Demonstrated marked reductions in SIL1 mRNA and protein expression driven by the mutant alleles.
Observed weakened binding interactions between the mutated SIL1 protein and the endoplasmic reticulum chaperone BiP.

Cite This Study

Jiang et al. (2026) studied this question.

synapsesocial.com/papers/6a93f00a6c1a8fb52e79c108 https://doi.org/10.3389/fgene.2026.1795147

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