12-10806574-C-A

Variant names:

• chr12-10806574-C-A
• rs773434850
• NM_023918.3:c.407G>T

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_023918.3(TAS2R8):​c.407G>T​(p.Gly136Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,620 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. G136A) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: TAS2R8 NM_023918.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.824
• Publications: 0 publications found

Genes affected

TAS2R8 (HGNC:14915): (taste 2 receptor member 8) This gene product belongs to the family of candidate taste receptors that are members of the G-protein-coupled receptor superfamily. These proteins are specifically expressed in the taste receptor cells of the tongue and palate epithelia. They are organized in the genome in clusters and are genetically linked to loci that influence bitter perception in mice and humans. In functional expression studies, they respond to bitter tastants. This gene maps to the taste receptor gene cluster on chromosome 12p13. [provided by RefSeq, Jul 2008]

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_023918.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TAS2R8	NM_023918.3	MANE Select	c.407G>T	p.Gly136Val	missense	Exon 1 of 1	NP_076407.1	Q9NYW2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TAS2R8	ENST00000240615.3	TSL:6 MANE Select	c.407G>T	p.Gly136Val	missense	Exon 1 of 1	ENSP00000240615.2	Q9NYW2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461620 Hom.: 0 Cov.: 33 AF XY: 0.00000138 AC XY: 1 AN XY: 727106

African (AFR) AF: 0.00 AC: 0 AN: 33468

American (AMR) AF: 0.00 AC: 0 AN: 44658

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26126

East Asian (EAS) AF: 0.00 AC: 0 AN: 39676

South Asian (SAS) AF: 0.00 AC: 0 AN: 86254

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53394

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5764

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1111914

Other (OTH) AF: 0.00 AC: 0 AN: 60366

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Benign	-0.13	T
BayesDel_noAF	Benign	-0.42
CADD	Benign	17
DANN	Uncertain	0.99
DEOGEN2	Benign	0.025	T
Eigen	Benign	-0.46
Eigen_PC	Benign	-0.73
FATHMM_MKL	Benign	0.046	N
M_CAP	Benign	0.0064	T
MetaRNN	Uncertain	0.57	D
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.6	L
PhyloP100		-0.82
PrimateAI	Benign	0.23	T
PROVEAN	Pathogenic	-5.5	D
REVEL	Benign	0.19
Sift	Benign	0.035	D
Sift4G	Uncertain	0.022	D
Polyphen		0.97	D
Vest4		0.35
MutPred		0.72		Gain of glycosylation at S141 (P = 0.1376)
MVP		0.23
MPC		0.0056
ClinPred		0.95	D
GERP RS		-4.7
Varity_R		0.18
gMVP		0.054
Mutation Taster		=96/4	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.44		Details are displayed if max score is > 0.2
DS_DG_spliceai		0.44		Position offset: 2

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

Other links and lift over

dbSNP: rs773434850; hg19: chr12-10959173;