rs6662276

Positions:

• chr1-18840399-C-A
• chr1-18840399-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_152232.6(TAS1R2):​c.1720G>T​(p.Ala574Ser) 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. 16/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A574T) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: TAS1R2 NM_152232.6 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.464

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 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.33226538).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TAS1R2	NM_152232.6	c.1720G>T	p.Ala574Ser	missense_variant	6/6	ENST00000375371.4	NP_689418.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TAS1R2	ENST00000375371.4	c.1720G>T	p.Ala574Ser	missense_variant	6/6	2	NM_152232.6	ENSP00000364520	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 37

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Benign	-0.19	T
BayesDel_noAF	Benign	-0.51
CADD	Benign	0.029
DANN	Benign	0.80
DEOGEN2	Benign	0.050	T
Eigen	Benign	-1.4
Eigen_PC	Benign	-1.4
FATHMM_MKL	Benign	0.10	N
LIST_S2	Benign	0.56	T
M_CAP	Benign	0.038	D
MetaRNN	Benign	0.33	T
MetaSVM	Benign	-0.72	T
MutationAssessor	Benign	1.2	L
MutationTaster	Benign	1.0	P
PrimateAI	Benign	0.20	T
PROVEAN	Benign	-1.2	N
REVEL	Benign	0.18
Sift	Benign	0.11	T
Sift4G	Benign	0.16	T
Polyphen		0.052	B
Vest4		0.088
MutPred		0.61		Gain of glycosylation at A574 (P = 0.0283);
MVP		0.72
MPC		0.12
ClinPred		0.044	T
GERP RS		-2.4
Varity_R		0.074
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

Publications

LitVar

Other links and lift over

dbSNP: rs6662276; hg19: chr1-19166893;