rs74811083
Variant summary
Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBA1
The NM_012452.3(TNFRSF13B):c.563A>T(p.Lys188Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00268 in 1,611,408 control chromosomes in the GnomAD database, including 112 homozygotes. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. K188T) has been classified as Uncertain significance.
Frequency
Consequence
NM_012452.3 missense
Scores
Clinical Significance
Conservation
Publications
- immunodeficiency, common variable, 2Inheritance: AD, AR Classification: DEFINITIVE, STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Laboratory for Molecular Medicine, ClinGen, G2P, Ambry Genetics
- common variable immunodeficiencyInheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
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ACMG classification
Our verdict: Benign. The variant received -20 ACMG points.
Transcripts
RefSeq
Ensembl
Frequencies
GnomAD3 genomes AF: 0.0145 AC: 2206AN: 151892Hom.: 52 Cov.: 32 show subpopulations
GnomAD2 exomes AF: 0.00346 AC: 868AN: 250762 AF XY: 0.00249 show subpopulations
GnomAD4 exome AF: 0.00144 AC: 2107AN: 1459396Hom.: 60 Cov.: 31 AF XY: 0.00123 AC XY: 891AN XY: 725466 show subpopulations
Age Distribution
GnomAD4 genome AF: 0.0145 AC: 2207AN: 152012Hom.: 52 Cov.: 32 AF XY: 0.0137 AC XY: 1017AN XY: 74290 show subpopulations
Age Distribution
ClinVar
Submissions by phenotype
not provided Benign:2
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not specified Benign:1
Variant summary: TNFRSF13B c.563A>T (p.Lys188Met) results in a non-conservative amino acid change located in the intracellular domain (Fried 2011) of the encoded protein sequence. Three of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.0046 in 276498 control chromosomes in the gnomAD database, including 27 homozygotes. The observed variant frequency is approximately 1600 fold above the estimated maximal expected allele frequency for a pathogenic variant in TNFRSF13B causing Common Variable Immunodeficiency (CVID) phenotype (2.9e-06), strongly suggesting that the variant is benign. Though c.563A>T has been reported in the literature in individual(s) affected with sporadic CVID (Grimbacher 2006), this report does not provide unequivocal conclusions about association of the variant with CVID. At least one publication reports experimental evidence evaluating an impact on protein function. These results showed no damaging effect of this variant for protein expression, ligand binding and signaling function (Fried 2011). Three clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. All laboratories classified the variant as benign/likely benign. Based on the evidence outlined above, the variant was classified as benign. -
Immunodeficiency, common variable, 2 Benign:1
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Common Variable Immune Deficiency, Dominant Benign:1
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Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at