chr20-63696792-C-G

Position:

• chr20-63696792-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_003823.4(TNFRSF6B):​c.25C>G​(p.Leu9Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000138 in 1,450,980 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 34)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: TNFRSF6B NM_003823.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.691

Genes affected

TNFRSF6B (HGNC:11921): (TNF receptor superfamily member 6b) This gene belongs to the tumor necrosis factor receptor superfamily. The encoded protein is postulated to play a regulatory role in suppressing FasL- and LIGHT-mediated cell death. It acts as a decoy receptor that competes with death receptors for ligand binding. Over-expression of this gene has been noted in gastrointestinal tract tumors. Read-through transcription into this gene from the neighboring upstream gene, which encodes regulator of telomere elongation helicase 1 (RTEL1), generates a non-coding transcript. [provided by RefSeq, Feb 2011]

RTEL1-TNFRSF6B (HGNC:44095): (RTEL1-TNFRSF6B readthrough (NMD candidate)) This locus represents naturally occurring read-through transcription between the neighboring RTEL1 (regulator of telomere elongation helicase 1) and TNFRSF6B (tumor necrosis factor receptor superfamily, member 6b, decoy) genes on chromosome 20. The read-through transcript is a candidate for nonsense-mediated mRNA decay (NMD), and is unlikely to produce a protein product. [provided by RefSeq, Feb 2011]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.07459238).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TNFRSF6B	NM_003823.4	c.25C>G	p.Leu9Val	missense_variant	1/3	ENST00000369996.3
RTEL1-TNFRSF6B	NR_037882.1	n.4759C>G		non_coding_transcript_exon_variant	36/38

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TNFRSF6B	ENST00000369996.3	c.25C>G	p.Leu9Val	missense_variant	1/3	1	NM_003823.4	P1
RTEL1-TNFRSF6B	ENST00000697815.1	n.2679C>G		non_coding_transcript_exon_variant	13/15

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome AF: 0.00000138 AC: 2 AN: 1450980 Hom.: 0 Cov.: 29 AF XY: 0.00000277 AC XY: 2 AN XY: 720932

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000181

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 34

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 04, 2022

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. 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: "Not Available"; Align-GVGD: "Class C0"). ClinVar contains an entry for this variant (Variation ID: 1463877). This variant has not been reported in the literature in individuals affected with TNFRSF6B-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces leucine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 9 of the TNFRSF6B protein (p.Leu9Val). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.068
BayesDel_addAF	Benign	-0.13	T
BayesDel_noAF	Benign	-0.42
CADD	Benign	3.5
DANN	Uncertain	0.98
DEOGEN2	Benign	0.086	T
Eigen	Benign	-0.68
Eigen_PC	Benign	-0.89
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Benign	0.44	T
M_CAP	Benign	0.013	T
MetaRNN	Benign	0.075	T
MetaSVM	Benign	-0.59	T
MutationAssessor	Benign	0.55	N
MutationTaster	Benign	1.0	N;N
PrimateAI	Uncertain	0.58	T
PROVEAN	Benign	-0.010	N
REVEL	Benign	0.033
Sift	Benign	0.30	T
Sift4G	Benign	0.40	T
Polyphen		0.084	B
Vest4		0.11
MutPred		0.41		Loss of loop (P = 0.0804);
MVP		0.26
MPC		0.014
ClinPred		0.096	T
GERP RS		0.57
Varity_R		0.069
gMVP		0.41

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs990360819; hg19: chr20-62328145;