17-16939448-T-TC

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 0P and 2B. BP6_Moderate

The NM_012452.3(TNFRSF13B):c.*98_*99insG variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00038 in 1,380,772 control chromosomes in the GnomAD database, including 3 homozygotes. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.0019 (1 hom., cov: 30)
  • Exomes 𝑓: 0.00020 (2 hom.)
• Consequence: TNFRSF13B NM_012452.3 3_prime_UTR
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 0.951

Genes affected

TNFRSF13B (HGNC:18153): (TNF receptor superfamily member 13B) The protein encoded by this gene is a lymphocyte-specific member of the tumor necrosis factor (TNF) receptor superfamily. It interacts with calcium-modulator and cyclophilin ligand (CAML). The protein induces activation of the transcription factors NFAT, AP1, and NF-kappa-B and plays a crucial role in humoral immunity by interacting with a TNF ligand. This gene is located within the Smith-Magenis syndrome region on chromosome 17. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• BP6: Variant 17-16939448-T-TC is Benign according to our data. Variant chr17-16939448-T-TC is described in ClinVar as [Benign]. Clinvar id is 933200.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TNFRSF13B	NM_012452.3	c.*98_*99insG		3_prime_UTR_variant	5/5	ENST00000261652.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TNFRSF13B	ENST00000261652.7	c.*98_*99insG		3_prime_UTR_variant	5/5	1	NM_012452.3	P2

Frequencies

GnomAD3 genomes AF: 0.00188 AC: 282 AN: 150316 Hom.: 1 Cov.: 30

Gnomad AFR AF: 0.00653

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000662

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000444

Gnomad OTH AF: 0.000971

GnomAD4 exome AF: 0.000198 AC: 243 AN: 1230338 Hom.: 2 Cov.: 18 AF XY: 0.000150 AC XY: 90 AN XY: 601824

Gnomad4 AFR exome AF: 0.00700

Gnomad4 AMR exome AF: 0.000163

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000301

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000251

Gnomad4 OTH exome AF: 0.000269

GnomAD4 genome AF: 0.00187 AC: 282 AN: 150434 Hom.: 1 Cov.: 30 AF XY: 0.00189 AC XY: 139 AN XY: 73410

Gnomad4 AFR AF: 0.00651

Gnomad4 AMR AF: 0.000662

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000444

Gnomad4 OTH AF: 0.000961

Alfa AF: 0.000500 Hom.: 0

Bravo AF: 0.00249

Asia WGS AF: 0.000581 AC: 2 AN: 3454

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Benign:1

Benign, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Jun 25, 2020

Variant summary: TNFRSF13B c.*98dupG is located in the untranslated mRNA region downstream of the termination codon. 4/4 computational tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. The variant allele was found at a frequency of 0.002 in 30888 control chromosomes in the gnomAD database, including 1 homozygote. The observed variant frequency is approximately 691 fold of the estimated maximal expected allele frequency for a pathogenic variant in TNFRSF13B causing Common Variable Immunodeficiency phenotype (2.9e-06), strongly suggesting that the variant is benign. To our knowledge, no occurrence of c.*98dupG in individuals affected with Common Variable Immunodeficiency and no experimental evidence demonstrating its impact on protein function have been reported. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014. Based on the evidence outlined above, the variant was classified as benign. -

Computational scores

Source: dbNSFP v4.3

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs555681458; hg19: chr17-16842762;