1-6576996-G-C

Variant names:

• chr1-6576996-G-C
• rs35118458
• NM_138697.4:c.1520G>C

Variant summary

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

The NM_138697.4(TAS1R1):​c.1520G>C​(p.Arg507Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,461,886 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. R507Q) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 34)
  • Exomes 𝑓: 0.0000027 (0 hom.)
• Consequence: TAS1R1 NM_138697.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.91
• Publications: 0 publications found

Genes affected

TAS1R1 (HGNC:14448): (taste 1 receptor member 1) The protein encoded by this gene is a G protein-coupled receptor and is a component of the heterodimeric amino acid taste receptor T1R1+3. The T1R1+3 receptor responds to L-amino acids but not to D-enantiomers or other compounds. Most amino acids that are perceived as sweet activate T1R1+3, and this activation is strictly dependent on an intact T1R1+3 heterodimer. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jun 2010]

LOC107984912 (HGNC:):

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_138697.4. 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
	TAS1R1	NM_138697.4	MANE Select	c.1520G>C	p.Arg507Pro	missense	Exon 5 of 6	NP_619642.2
	TAS1R1	NM_177540.3		c.758G>C	p.Arg253Pro	missense	Exon 4 of 5	NP_803884.1	Q7RTX1-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TAS1R1	ENST00000333172.11	TSL:1 MANE Select	c.1520G>C	p.Arg507Pro	missense	Exon 5 of 6	ENSP00000331867.6	Q7RTX1-1
	TAS1R1	ENST00000415267.1	TSL:1	c.533G>C	p.Arg178Pro	missense	Exon 3 of 4	ENSP00000408448.1	H0Y6X0
	TAS1R1	ENST00000351136.7	TSL:2	c.758G>C	p.Arg253Pro	missense	Exon 4 of 5	ENSP00000312558.5	Q7RTX1-2

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome AF: 0.00000274 AC: 4 AN: 1461886 Hom.: 0 Cov.: 32 AF XY: 0.00000275 AC XY: 2 AN XY: 727246

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26132

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53420

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000360 AC: 4 AN: 1112008

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome Cov.: 34

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.62
BayesDel_addAF	Pathogenic	0.17	D
BayesDel_noAF	Uncertain	0.010
CADD	Benign	22
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.53	D
Eigen	Benign	0.0051
Eigen_PC	Benign	-0.16
FATHMM_MKL	Benign	0.51	D
LIST_S2	Benign	0.84	T
M_CAP	Uncertain	0.18	D
MetaRNN	Uncertain	0.72	D
MetaSVM	Uncertain	0.12	D
MutationAssessor	Uncertain	2.7	M
PhyloP100		1.9
PrimateAI	Benign	0.33	T
PROVEAN	Pathogenic	-4.6	D
REVEL	Uncertain	0.46
Sift	Uncertain	0.0030	D
Sift4G	Uncertain	0.0040	D
Polyphen		1.0	D
Vest4		0.62
MutPred		0.47		Loss of sheet (P = 0.0457)
MVP		0.49
MPC		0.83
ClinPred		0.98	D
GERP RS		2.9
Varity_R		0.94
gMVP		0.89
Mutation Taster		=75/25	polymorphism

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

Other links and lift over

dbSNP: rs35118458; hg19: chr1-6637056;