rs375363608
Variant summary
Our verdict is Likely benign. The variant received -2 ACMG points: 0P and 2B. BP4_Moderate
The NM_025137.4(SPG11):c.3988C>G(p.Gln1330Glu) variant causes a missense change. The variant allele was found at a frequency of 0.000337 in 1,613,132 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Q1330R) has been classified as Uncertain significance.
Frequency
Consequence
NM_025137.4 missense
Scores
Clinical Significance
Conservation
Publications
- hereditary spastic paraplegia 11Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: ClinGen, Orphanet, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Illumina, G2P
- amyotrophic lateral sclerosis type 5Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp
- Charcot-Marie-Tooth disease axonal type 2XInheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, Genomics England PanelApp
- juvenile amyotrophic lateral sclerosisInheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
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ACMG classification
Our verdict: Likely_benign. The variant received -2 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
SPG11 | NM_025137.4 | c.3988C>G | p.Gln1330Glu | missense_variant | Exon 23 of 40 | ENST00000261866.12 | NP_079413.3 |
Ensembl
Frequencies
GnomAD3 genomes AF: 0.000243 AC: 37AN: 152220Hom.: 0 Cov.: 32 show subpopulations
GnomAD2 exomes AF: 0.000147 AC: 37AN: 251312 AF XY: 0.000125 show subpopulations
GnomAD4 exome AF: 0.000347 AC: 507AN: 1460912Hom.: 0 Cov.: 30 AF XY: 0.000337 AC XY: 245AN XY: 726884 show subpopulations
GnomAD4 genome AF: 0.000243 AC: 37AN: 152220Hom.: 0 Cov.: 32 AF XY: 0.000161 AC XY: 12AN XY: 74370 show subpopulations
ClinVar
Submissions by phenotype
not provided Uncertain:4
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SPG11: PM2, BP4 -
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Hereditary spastic paraplegia 11 Uncertain:3
This sequence change replaces glutamine, which is neutral and polar, with glutamic acid, which is acidic and polar, at codon 1330 of the SPG11 protein (p.Gln1330Glu). This variant is present in population databases (rs375363608, gnomAD 0.03%). This variant has not been reported in the literature in individuals affected with SPG11-related conditions. ClinVar contains an entry for this variant (Variation ID: 188249). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -
This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -
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not specified Uncertain:1
Variant summary: SPG11 c.3988C>G (p.Gln1330Glu) results in a conservative amino acid change in the encoded protein sequence. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change. The variant allele was found at a frequency of 0.00015 in 251312 control chromosomes. This frequency is not significantly higher than estimated for a pathogenic variant in SPG11 causing Hereditary spastic paraplegia 11, allowing no conclusion about variant significance. To our knowledge, no occurrence of c.3988C>G in individuals affected with Hereditary spastic paraplegia 11 and no experimental evidence demonstrating its impact on protein function have been reported. ClinVar contains an entry for this variant (Variation ID: 188249). Based on the evidence outlined above, the variant was classified as uncertain significance. -
Inborn genetic diseases Uncertain:1
The p.Q1330E variant (also known as c.3988C>G), located in coding exon 23 of the SPG11 gene, results from a C to G substitution at nucleotide position 3988. The glutamine at codon 1330 is replaced by glutamic acid, an amino acid with highly similar properties. This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -
Hereditary spastic paraplegia Uncertain:1
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Amyotrophic lateral sclerosis type 5 Uncertain:1
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Charcot-Marie-Tooth disease axonal type 2X Uncertain:1
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Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at