15-22081303-A-G

Position:

• chr15-22081303-A-G

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_001004719.2(OR4M2):​c.679A>G​(p.Lys227Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. In-silico tool predicts a benign outcome for this variant. 11/16 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 0)
• Consequence: OR4M2 NM_001004719.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.01

Genes affected

OR4M2 (HGNC:15373): (olfactory receptor family 4 subfamily M member 2) 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]

OR4M2-OT1 (HGNC:):

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.0917303).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
OR4M2	NM_001004719.2	c.679A>G	p.Lys227Glu	missense_variant	1/1	ENST00000614722.3
OR4M2-OT1	NR_110480.1	n.824-13210A>G		intron_variant, non_coding_transcript_variant
OR4M2-OT1	NR_110481.1	n.556-13210A>G		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
OR4M2	ENST00000614722.3	c.679A>G	p.Lys227Glu	missense_variant	1/1		NM_001004719.2	P1
OR4M2	ENST00000638815.1	n.512+202A>G		intron_variant, non_coding_transcript_variant		5

Frequencies

GnomAD3 genomes Cov.: 0

GnomAD3 exomes AF: 0.0000159 AC: 4 AN: 251364 Hom.: 0 AF XY: 0.0000221 AC XY: 3 AN XY: 135854

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000289

Gnomad ASJ exome AF: 0.0000992

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000176

Gnomad OTH exome AF: 0.00

GnomAD4 exome Cov.: 0

GnomAD4 genome Cov.: 0

Alfa AF: 0.000111 Hom.: 0

ExAC AF: 0.00000824 AC: 1

EpiCase AF: 0.00

EpiControl AF: 0.0000593

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

Oct 05, 2022

The c.679A>G (p.K227E) alteration is located in exon 1 (coding exon 1) of the OR4M2 gene. This alteration results from a A to G substitution at nucleotide position 679, causing the lysine (K) at amino acid position 227 to be replaced by a glutamic acid (E). 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	0.12
BayesDel_addAF	Benign	-0.12	T
BayesDel_noAF	Benign	-0.33
CADD	Benign	16
DANN	Benign	0.86
DEOGEN2	Benign	0.0068	T
Eigen	Benign	-0.66
Eigen_PC	Benign	-0.75
FATHMM_MKL	Benign	0.21	N
LIST_S2	Benign	0.19	T
M_CAP	Benign	0.0037	T
MetaRNN	Benign	0.092	T
MetaSVM	Benign	-0.95	T
MutationAssessor	Uncertain	2.4	M
MutationTaster	Benign	1.0	N
Sift4G	Benign	0.48	T
Polyphen		0.037	B
Vest4		0.29
MVP		0.36
ClinPred		0.064	T
GERP RS		2.5
Varity_R		0.31
gMVP		0.25

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.070		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: rs772324566; hg19: chr15-22369254;