Genetic Variant TAS1R3:p.Thr55Lys (chr1-1331509-C-A) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_152228.3(TAS1R3):c.164C>A(p.Thr55Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000237 in 1,600,930 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00018 ( 0 hom., cov: 34)

Exomes 𝑓: 0.0000069 ( 0 hom. )

Consequence

TAS1R3
NM_152228.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.0740

Variant links:

Genes affected

TAS1R3 (HGNC:15661): (taste 1 receptor member 3) The protein encoded by this gene is a G-protein coupled receptor involved in taste responses. The encoded protein can form a heterodimeric receptor with TAS1R1 to elicit the umami taste response, or it can bind with TAS1R2 to form a receptor for the sweet taste response. [provided by RefSeq, Nov 2015]

TAS1R3 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.107937574).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TAS1R3	NM_152228.3 link	c.164C>A	p.Thr55Lys	missense_variant	Exon 1 of 6	ENST00000339381.6	NP_689414.2	Q7RTX0
TAS1R3	XM_017002435.2 link	c.164C>A	p.Thr55Lys	missense_variant	Exon 1 of 5		XP_016857924.1
TAS1R3	XM_017002436.2 link	c.164C>A	p.Thr55Lys	missense_variant	Exon 1 of 5		XP_016857925.1
TAS1R3	XM_047431571.1 link	c.164C>A	p.Thr55Lys	missense_variant	Exon 1 of 6		XP_047287527.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TAS1R3	ENST00000339381.6 link	c.164C>A	p.Thr55Lys	missense_variant	Exon 1 of 6	2	NM_152228.3	ENSP00000344411.5		Q7RTX0

Frequencies

GnomAD3 genomes

AF:

0.000184

AC:

AN:

152242

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000675

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000323

AC:

AN:

216762

Hom.:

AF XY:

0.0000251

AC XY:

AN XY:

119616

show subpopulations

Gnomad AFR exome

AF:

0.000570

Gnomad AMR exome

AF:

0.00

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000690

AC:

AN:

1448688

Hom.:

Cov.:

AF XY:

0.00000417

AC XY:

AN XY:

719946

show subpopulations

Gnomad4 AFR exome

AF:

0.000272

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000167

GnomAD4 genome

AF:

0.000184

AC:

AN:

152242

Hom.:

Cov.:

AF XY:

0.000215

AC XY:

AN XY:

74382

show subpopulations

Gnomad4 AFR

AF:

0.000675

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:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000136

Hom.:

Bravo

AF:

0.000162

ESP6500AA

AF:

0.000465

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000333

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Aug 29, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.164C>A (p.T55K) alteration is located in exon 1 (coding exon 1) of the TAS1R3 gene. This alteration results from a C to A substitution at nucleotide position 164, causing the threonine (T) at amino acid position 55 to be replaced by a lysine (K). 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

0.10

BayesDel_addAF

Benign

-0.17

BayesDel_noAF

Benign

-0.12

CADD

Benign

DANN

Benign

0.95

DEOGEN2

Benign

0.19

Eigen

Benign

-0.64

Eigen_PC

Benign

-0.76

FATHMM_MKL

Benign

0.23

LIST_S2

Benign

0.53

M_CAP

Benign

0.077

MetaRNN

Benign

0.11

MetaSVM

Benign

-0.71

MutationAssessor

Benign

1.9

PrimateAI

Uncertain

0.57

PROVEAN

Uncertain

-2.5

REVEL

Benign

0.29

Sift

Uncertain

0.0040

Sift4G

Uncertain

0.032

Polyphen

0.97

Vest4

0.43

MVP

0.57

ClinPred

0.20

GERP RS

2.2

Varity_R

0.15

gMVP

0.50

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

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