NM_138927.4:c.4640delA
Variant summary
Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PVS1PM2PP5_Moderate
The NM_138927.4(SON):c.4640delA(p.His1547LeufsTer76) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★). Variant results in nonsense mediated mRNA decay.
Frequency
Consequence
NM_138927.4 frameshift
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Pathogenic. Variant got 12 ACMG points.
Transcripts
RefSeq
Ensembl
Frequencies
GnomAD3 genomes Cov.: 32
GnomAD4 exome Cov.: 39
GnomAD4 genome Cov.: 32
ClinVar
Submissions by phenotype
ZTTK syndrome Pathogenic:2
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not provided Pathogenic:1
The c.4640delA variant in the SON gene has been reported previously using alternate nomenclature c.4640del in the apparently de novo state in association with a SON-related disorder (Kim et al., 2016). The c.4640delA variant causes a frameshift starting with codon Histidine 1547, changes this amino acid to a Leucine residue, and creates a premature Stop codon at position 76 of the new reading frame, denoted p.His1547LeufsX76. This variant is predicted to cause loss of normal protein function either through protein truncation or nonsense-mediated mRNA decay. The c.4640delA variant is not observed in large population cohorts (Lek et al., 2016). We interpret c.4640delA as a pathogenic variant. -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at