chr17-16940394-T-G

Variant names:

• chr17-16940394-T-G
• rs74811083
• NM_012452.3:c.563A>C

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_012452.3(TNFRSF13B):​c.563A>C​(p.Lys188Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts 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. K188M) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: TNFRSF13B NM_012452.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.140
• Publications: 0 publications found

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]

TNFRSF13B Gene-Disease associations (from GenCC):

• immunodeficiency, common variable, 2

  Inheritance: AD, AR Classification: DEFINITIVE, STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Laboratory for Molecular Medicine, ClinGen, G2P, Ambry Genetics
• common variable immunodeficiency

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ENSG00000307457 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.26479244).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TNFRSF13B	NM_012452.3	c.563A>C	p.Lys188Thr	missense_variant	Exon 4 of 5	ENST00000261652.7	NP_036584.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TNFRSF13B	ENST00000261652.7	c.563A>C	p.Lys188Thr	missense_variant	Exon 4 of 5	1	NM_012452.3	ENSP00000261652.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Feb 28, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.563A>C (p.K188T) alteration is located in exon 4 (coding exon 4) of the TNFRSF13B gene. This alteration results from a A to C substitution at nucleotide position 563, causing the lysine (K) at amino acid position 188 to be replaced by a threonine (T). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.29
BayesDel_addAF	Uncertain	0.089	D
BayesDel_noAF	Benign	-0.11
CADD	Benign	16
DANN	Benign	0.64
DEOGEN2	Uncertain	0.66	D;.
Eigen	Benign	-0.60
Eigen_PC	Benign	-0.57
FATHMM_MKL	Benign	0.34	N
LIST_S2	Benign	0.76	T;T
M_CAP	Uncertain	0.087	D
MetaRNN	Benign	0.26	T;T
MetaSVM	Uncertain	-0.12	T
MutationAssessor	Benign	0.69	N;.
PhyloP100		0.14
PrimateAI	Benign	0.33	T
PROVEAN	Uncertain	-3.6	D;.
REVEL	Uncertain	0.30
Sift	Uncertain	0.0070	D;.
Sift4G	Uncertain	0.0080	D;D
Polyphen		0.21	B;B
Vest4		0.37
MutPred		0.32		Loss of methylation at K188 (P = 0.0043);.;
MVP		0.73
MPC		0.019
ClinPred		0.21	T
GERP RS		2.4
Varity_R		0.15
gMVP		0.28

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

Other links and lift over

dbSNP: rs74811083; hg19: chr17-16843708;