12-10801963-A-G

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_023919.2(TAS2R7):c.608T>C(p.Leu203Pro) 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 pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: TAS2R7 NM_023919.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.90

Genes affected

TAS2R7 (HGNC:14913): (taste 2 receptor member 7) 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

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.969

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TAS2R7	NM_023919.2	c.608T>C	p.Leu203Pro	missense_variant	1/1	ENST00000240687.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TAS2R7	ENST00000240687.2	c.608T>C	p.Leu203Pro	missense_variant	1/1		NM_023919.2	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

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

May 09, 2022

The c.608T>C (p.L203P) alteration is located in exon 1 (coding exon 1) of the TAS2R7 gene. This alteration results from a T to C substitution at nucleotide position 608, causing the leucine (L) at amino acid position 203 to be replaced by a proline (P). 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	Uncertain	0.42
BayesDel_addAF	Uncertain	0.084	D
BayesDel_noAF	Benign	-0.12
Cadd	Uncertain	24
Dann	Uncertain	1.0
DEOGEN2	Benign	0.064	T
Eigen	Uncertain	0.46
Eigen_PC	Uncertain	0.26
FATHMM_MKL	Benign	0.60	D
M_CAP	Benign	0.0032	T
MetaRNN	Pathogenic	0.97	D
MetaSVM	Benign	-0.98	T
MutationAssessor	Pathogenic	3.7	H
MutationTaster	Benign	0.94	N
PrimateAI	Benign	0.45	T
PROVEAN	Pathogenic	-6.4	D
REVEL	Benign	0.23
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0010	D
Polyphen		0.99	D
Vest4		0.81
MutPred		0.89		Loss of stability (P = 0.0075);
MVP		0.27
MPC		0.012
ClinPred		0.99	D
GERP RS		5.5
Varity_R		0.97
gMVP		0.51

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr12-10954562;