1-18840420-T-C

Variant summary

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

The NM_152232.6(TAS1R2):c.1699A>G(p.Ile567Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000116 in 1,461,834 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 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. I567F) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.000012 (0 hom.)
• Consequence: TAS1R2 NM_152232.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.00400

Genes affected

TAS1R2 (HGNC:14905): (taste 1 receptor member 2) Contributes to sweet taste receptor activity. Involved in detection of chemical stimulus involved in sensory perception of sweet taste and positive regulation of cytokinesis. Part of sweet taste receptor complex. [provided by Alliance of Genome Resources, Apr 2022]

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=0.09012663).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TAS1R2	NM_152232.6	c.1699A>G	p.Ile567Val	missense_variant	6/6	ENST00000375371.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TAS1R2	ENST00000375371.4	c.1699A>G	p.Ile567Val	missense_variant	6/6	2	NM_152232.6	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.0000116 AC: 17 AN: 1461834 Hom.: 0 Cov.: 36 AF XY: 0.00000825 AC XY: 6 AN XY: 727218

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: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000144

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 26, 2021

The c.1699A>G (p.I567V) alteration is located in exon 6 (coding exon 6) of the TAS1R2 gene. This alteration results from a A to G substitution at nucleotide position 1699, causing the isoleucine (I) at amino acid position 567 to be replaced by a valine (V). 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	0.067
BayesDel_addAF	Benign	-0.071	T
BayesDel_noAF	Benign	-0.34
Cadd	Benign	4.6
Dann	Benign	0.91
DEOGEN2	Benign	0.047	T
Eigen	Benign	-0.43
Eigen_PC	Benign	-0.25
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Benign	0.73	T
M_CAP	Benign	0.040	D
MetaRNN	Benign	0.090	T
MetaSVM	Benign	-0.44	T
MutationAssessor	Benign	1.5	L
MutationTaster	Benign	0.75	N
PrimateAI	Benign	0.31	T
PROVEAN	Benign	-0.25	N
REVEL	Benign	0.25
Sift	Benign	0.43	T
Sift4G	Benign	0.75	T
Polyphen		0.011	B
Vest4		0.13
MutPred		0.50		Gain of catalytic residue at I567 (P = 0.0515);
MVP		0.50
MPC		0.11
ClinPred		0.15	T
GERP RS		4.3
Varity_R		0.044
gMVP		0.26

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr1-19166914;