chr11-124570477-T-C

Position:

• chr11-124570477-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_001005194.2(OR8A1):​c.358T>C​(p.Tyr120His) variant causes a missense change. The variant allele was found at a frequency of 0.00000205 in 1,461,808 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: OR8A1 NM_001005194.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.77

Genes affected

OR8A1 (HGNC:8469): (olfactory receptor family 8 subfamily A member 1) Olfactory receptors interact with odorant molecules in the nose, to initiate a neuronal response that triggers the perception of a smell. The olfactory receptor proteins are members of a large family of G-protein-coupled receptors (GPCR) arising from single coding-exon genes. Olfactory receptors share a 7-transmembrane domain structure with many neurotransmitter and hormone receptors and are responsible for the recognition and G protein-mediated transduction of odorant signals. The olfactory receptor gene family is the largest in the genome. The nomenclature assigned to the olfactory receptor genes and proteins for this organism is independent of other organisms. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.32924247).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
OR8A1	NM_001005194.2	c.358T>C	p.Tyr120His	missense_variant	1/1	ENST00000284287.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
OR8A1	ENST00000284287.6	c.358T>C	p.Tyr120His	missense_variant	1/1		NM_001005194.2	P1
OR8A1	ENST00000642111.1	c.409T>C	p.Tyr137His	missense_variant	1/1
OR8A1	ENST00000641670.1	c.358T>C	p.Tyr120His	missense_variant	2/2			P1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD3 exomes AF: 0.00000399 AC: 1 AN: 250716 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 135462

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 SAS exome AF: 0.0000327

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461808 Hom.: 0 Cov.: 43 AF XY: 0.00 AC XY: 0 AN XY: 727204

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000232

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 31

ExAC AF: 0.00000824 AC: 1

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

Sep 21, 2023

The c.409T>C (p.Y137H) alteration is located in exon 1 (coding exon 1) of the OR8A1 gene. This alteration results from a T to C substitution at nucleotide position 409, causing the tyrosine (Y) at amino acid position 137 to be replaced by a histidine (H). 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	0.41
BayesDel_addAF	Benign	-0.082	T
BayesDel_noAF	Benign	-0.36
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Benign	0.17	.;T;.
Eigen	Pathogenic	0.78
Eigen_PC	Pathogenic	0.69
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Benign	0.74	.;T;T
M_CAP	Benign	0.0018	T
MetaRNN	Benign	0.33	T;T;T
MetaSVM	Benign	-0.99	T
MutationAssessor	Pathogenic	3.0	.;M;.
MutationTaster	Benign	0.95	D
PrimateAI	Benign	0.30	T
REVEL	Benign	0.17
Polyphen		1.0	.;D;.
MutPred		0.37		.;Loss of stability (P = 0.0286);.;
MVP		0.49
MPC		0.44
ClinPred		0.98	D
GERP RS		5.0
Varity_R		0.83
gMVP		0.33

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

Other links and lift over

dbSNP: rs774810077; hg19: chr11-124440373;