rs745411339

Variant names:

• chr15-22081283-T-G
• rs745411339
• NM_001004719.2:c.659T>G

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 0P and 1B. BP4

The NM_001004719.2(OR4M2):​c.659T>G​(p.Phe220Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. In-silico tool predicts a benign outcome for this variant. 10/16 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: -0.598

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:56199): (OR4M2 overlapping transcript 1)

ACMG classification

Verdict is Likely_benign. Variant got -1 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.361826).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
OR4M2	NM_001004719.2	c.659T>G	p.Phe220Cys	missense_variant	Exon 1 of 1	ENST00000614722.3	NP_001004719.2
OR4M2-OT1	NR_110480.1	n.824-13230T>G		intron_variant	Intron 7 of 8
OR4M2-OT1	NR_110481.1	n.556-13230T>G		intron_variant	Intron 5 of 6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
OR4M2	ENST00000614722.3	c.659T>G	p.Phe220Cys	missense_variant	Exon 1 of 1	6	NM_001004719.2	ENSP00000483239.1
OR4M2-OT1	ENST00000639059.1	c.-9-13230T>G		intron_variant	Intron 6 of 6	2		ENSP00000493899.1
OR4M2	ENST00000638815.1	n.512+182T>G		intron_variant	Intron 3 of 3	5

Frequencies

GnomAD3 genomes Cov.: 0

GnomAD4 exome Cov.: 0

GnomAD4 genome Cov.: 0

Alfa AF: 0.0000468 Hom.: 0

ExAC AF: 0.0000247 AC: 3

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Nov 23, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.659T>G (p.F220C) alteration is located in exon 1 (coding exon 1) of the OR4M2 gene. This alteration results from a T to G substitution at nucleotide position 659, causing the phenylalanine (F) at amino acid position 220 to be replaced by a cysteine (C). 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	-0.32	T
BayesDel_noAF	Benign	-0.46
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Benign	0.0083	T
Eigen	Benign	-0.11
Eigen_PC	Benign	-0.23
FATHMM_MKL	Benign	0.15	N
LIST_S2	Benign	0.29	T
M_CAP	Benign	0.0063	T
MetaRNN	Benign	0.36	T
MetaSVM	Benign	-0.71	T
MutationAssessor	Benign	0.71	N
Sift4G	Uncertain	0.0040	D
Polyphen		1.0	D
Vest4		0.18
MutPred		0.71		Gain of catalytic residue at L221 (P = 0.0238);
MVP		0.61
ClinPred		0.50	T
GERP RS		2.5
Varity_R		0.14
gMVP		0.34

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

Other links and lift over

dbSNP: rs745411339; hg19: chr15-22369234;