chr11-49982245-T-C

Position:

• chr11-49982245-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001005270.4(OR4C12):​c.257A>G​(p.Glu86Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,806 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: OR4C12 NM_001005270.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.106

Genes affected

OR4C12 (HGNC:15168): (olfactory receptor family 4 subfamily C member 12) 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 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.09313893).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
OR4C12	NM_001005270.4	c.257A>G	p.Glu86Gly	missense_variant	1/1	ENST00000335238.4	NP_001005270.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
OR4C12	ENST00000335238.4	c.257A>G	p.Glu86Gly	missense_variant	1/1	6	NM_001005270.4	ENSP00000334418.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461806 Hom.: 0 Cov.: 33 AF XY: 0.00000275 AC XY: 2 AN XY: 727214

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: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.0000331

GnomAD4 genome Cov.: 32

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

Jan 26, 2022

The c.257A>G (p.E86G) alteration is located in exon 1 (coding exon 1) of the OR4C12 gene. This alteration results from a A to G substitution at nucleotide position 257, causing the glutamic acid (E) at amino acid position 86 to be replaced by a glycine (G). 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	0.070
BayesDel_addAF	Benign	-0.29	T
BayesDel_noAF	Benign	-0.66
CADD	Benign	15
DANN	Benign	0.96
DEOGEN2	Benign	0.010	T
Eigen	Benign	-0.87
Eigen_PC	Benign	-0.88
FATHMM_MKL	Benign	0.047	N
M_CAP	Benign	0.0012	T
MetaRNN	Benign	0.093	T
MetaSVM	Benign	-0.91	T
MutationAssessor	Benign	1.3	L
PrimateAI	Uncertain	0.56	T
PROVEAN	Pathogenic	-4.7	D
REVEL	Benign	0.021
Sift	Benign	0.11	T
Sift4G	Benign	0.20	T
Polyphen		0.012	B
Vest4		0.10
MutPred		0.47		Loss of stability (P = 0.017);
MVP		0.32
MPC		0.0045
ClinPred		0.20	T
GERP RS		2.1
Varity_R		0.20
gMVP		0.069

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.11		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: rs1854154848; hg19: chr11-50003781;