NM_176884.2:c.843G>T

Variant names:

• chr12-11091387-C-A
• rs758721184
• NM_176884.2:c.843G>T

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 0P and 1B. BP4

The NM_176884.2(TAS2R43):​c.843G>T​(p.Trp281Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.0000088 (0 hom., cov: 17)
  • Exomes 𝑓: 0.000014 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: TAS2R43 NM_176884.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.0700
• Publications: 0 publications found

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]

ENSG00000275778 (HGNC:):

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]

PRR4 (HGNC:18020): (proline rich 4) This gene encodes a member of the proline-rich protein family that lacks a conserved repetitive domain. This protein may play a role in protective functions in the eye. Alternative splicing result in multiple transcript variants. Read-through transcription also exists between this gene and the upstream PRH1 (proline-rich protein HaeIII subfamily 1) gene. [provided by RefSeq, Feb 2011]

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]

ACMG classification

Our verdict: Likely_benign. The variant received -1 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.37441507).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_176884.2. 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
	TAS2R43	NM_176884.2	MANE Select	c.843G>T	p.Trp281Cys	missense	Exon 1 of 1	NP_795365.2	P59537
	PRH1	NM_001291315.2		c.-133-44199G>T		intron	N/A	NP_001278244.1
	PRH1	NM_001291314.2		c.-294-44199G>T		intron	N/A	NP_001278243.1	A0A087WV42

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TAS2R43	ENST00000531678.1	TSL:6 MANE Select	c.843G>T	p.Trp281Cys	missense	Exon 1 of 1	ENSP00000431719.1	P59537
	ENSG00000275778	ENST00000536668.2	TSL:5	n.-164-44199G>T		intron	N/A	ENSP00000482961.1	A0A087WZY1
	PRR4	ENST00000535024.7	TSL:5	c.-133-44199G>T		intron	N/A	ENSP00000481571.3	A0A087WY73

Frequencies

GnomAD3 genomes AF: 0.00000880 AC: 1 AN: 113662 Hom.: 0 Cov.: 17

Gnomad AFR AF: 0.00

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: 0.0000208

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000139 AC: 3 AN: 215928 AF XY: 0.00000847

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000210

Gnomad OTH exome AF: 0.00

GnomAD4 exome Data not reliable, filtered out with message: AS_VQSR AF: 0.0000139 AC: 17 AN: 1223858 Hom.: 0 Cov.: 37 AF XY: 0.0000163 AC XY: 10 AN XY: 612058

African (AFR) AF: 0.0000329 AC: 1 AN: 30406

American (AMR) AF: 0.00 AC: 0 AN: 38176

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 23926

East Asian (EAS) AF: 0.00 AC: 0 AN: 38058

South Asian (SAS) AF: 0.0000123 AC: 1 AN: 81366

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 38476

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5444

European-Non Finnish (NFE) AF: 0.0000164 AC: 15 AN: 916804

Other (OTH) AF: 0.00 AC: 0 AN: 51202

GnomAD4 genome Data not reliable, filtered out with message: AS_VQSR AF: 0.00000880 AC: 1 AN: 113662 Hom.: 0 Cov.: 17 AF XY: 0.00 AC XY: 0 AN XY: 55168

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 33926

American (AMR) AF: 0.00 AC: 0 AN: 11136

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3018

East Asian (EAS) AF: 0.00 AC: 0 AN: 4724

South Asian (SAS) AF: 0.00 AC: 0 AN: 4208

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 6076

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 266

European-Non Finnish (NFE) AF: 0.0000208 AC: 1 AN: 48166

Other (OTH) AF: 0.00 AC: 0 AN: 1612

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Alfa AF: 0.00 Hom.: 0

ExAC AF: 0.0000167 AC: 2

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.33
BayesDel_addAF	Benign	-0.16	T
BayesDel_noAF	Benign	-0.47
CADD	Benign	18
DANN	Benign	0.73
DEOGEN2	Benign	0.019	T
Eigen	Benign	-0.62
Eigen_PC	Benign	-0.81
FATHMM_MKL	Benign	0.017	N
LIST_S2	Benign	0.86	D
M_CAP	Benign	0.0048	T
MetaRNN	Benign	0.37	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.8	M
PhyloP100		0.070
PrimateAI	Benign	0.31	T
PROVEAN	Pathogenic	-9.4	D
REVEL	Benign	0.082
Sift	Uncertain	0.028	D
Sift4G	Uncertain	0.0040	D
Polyphen		0.23	B
Vest4		0.40
MutPred		0.63		Loss of MoRF binding (P = 0.0407)
MVP		0.27
MPC		0.65
ClinPred		0.76	D
GERP RS		1.6
Varity_R		0.54
gMVP		0.084
Mutation Taster		=99/1	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.060		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs758721184; hg19: chr12-11243986;