12-11092022-C-G

Position:

chr12-11092022-C-G

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_176884.2(TAS2R43):c.208G>C(p.Val70Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000532 in 1,483,660 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000057 ( 0 hom., cov: 22)

Exomes 𝑓: 0.000053 ( 1 hom. )

Consequence

TAS2R43
NM_176884.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -5.34

Variant links:

Genes affected

TAS2R43 (HGNC:18875): (taste 2 receptor member 43) TAS2R43 belongs to the large TAS2R receptor family. TAS2Rs are expressed on the surface of taste receptor cells and mediate the perception of bitterness through a G protein-coupled second messenger pathway (Conte et al., 2002 [PubMed 12584440]). For further information on TAS2Rs, see MIM 604791.[supplied by OMIM, Mar 2009]

TAS2R43 links:

PRH1 (HGNC:9366): (proline rich protein HaeIII subfamily 1) This gene encodes a member of the heterogeneous family of proline-rich salivary glycoproteins. The encoded preproprotein undergoes proteolytic processing to generate one or more mature isoforms before secretion from the parotid and submandibular/sublingual glands. Multiple distinct alleles of this locus including the parotid isoelectric-focusing variant slow (PIF-s), the parotid acidic protein (Pa), and the double band slow (Db-s) isoforms have been characterized. The reference genome encodes the Db-s allele. Certain alleles of this gene are associated with susceptibility to dental caries. This gene is located in a cluster of closely related salivary proline-rich proteins on chromosome 12. Co-transcription of this gene with adjacent genes has been observed. Alternate splicing of this gene results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Oct 2015]

PRH1 links:

PRH1-TAS2R14 (HGNC:):

PRH1-TAS2R14 links:

TAS2R14 (HGNC:14920): (taste 2 receptor member 14) 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]

TAS2R14 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.055438995).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TAS2R43	NM_176884.2 link	c.208G>C	p.Val70Leu	missense_variant	1/1	ENST00000531678.1	NP_795365.2	P59537

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TAS2R43	ENST00000531678.1 link	c.208G>C	p.Val70Leu	missense_variant	1/1	6	NM_176884.2	ENSP00000431719.1		P59537

Frequencies

GnomAD3 genomes

AF:

0.0000565

AC:

AN:

123788

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000554

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000948

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000897

AC:

AN:

211858

Hom.:

AF XY:

0.0000779

AC XY:

AN XY:

115554

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000692

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000187

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000529

AC:

AN:

1359872

Hom.:

Cov.:

AF XY:

0.0000441

AC XY:

AN XY:

679688

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000481

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000255

Gnomad4 SAS exome

AF:

0.0000119

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000663

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000565

AC:

AN:

123788

Hom.:

Cov.:

AF XY:

0.0000498

AC XY:

AN XY:

60264

show subpopulations

Gnomad4 AFR

AF:

0.0000554

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000948

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000408

Hom.:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000126

AC:

ExAC

AF:

0.0000669

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Aug 21, 2024

The c.208G>C (p.V70L) alteration is located in exon 1 (coding exon 1) of the TAS2R43 gene. This alteration results from a G to C substitution at nucleotide position 208, causing the valine (V) at amino acid position 70 to be replaced by a leucine (L). 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

0.17

BayesDel_addAF

Benign

-0.32

BayesDel_noAF

Benign

-0.70

CADD

Benign

0.050

DANN

Benign

0.70

DEOGEN2

Benign

0.0063

Eigen

Benign

-1.2

Eigen_PC

Benign

-1.4

FATHMM_MKL

Benign

0.0053

LIST_S2

Benign

0.70

M_CAP

Benign

0.0011

MetaRNN

Benign

0.055

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.9

PrimateAI

Benign

0.27

PROVEAN

Benign

-1.2

REVEL

Benign

0.020

Sift

Benign

0.22

Sift4G

Benign

0.28

Polyphen

0.0060

Vest4

0.072

MutPred

0.66

Loss of helix (P = 0.1706);

MVP

0.13

MPC

0.11

ClinPred

0.031

GERP RS

-1.1

Varity_R

0.11

gMVP

0.085

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over