chr19-14799862-A-G

Position:

• chr19-14799862-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_001370485.4(OR7C1):​c.275T>C​(p.Ile92Thr) variant causes a missense change. The variant allele was found at a frequency of 0.00000657 in 152,174 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
• Consequence: OR7C1 NM_001370485.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.78

Genes affected

OR7C1 (HGNC:8373): (olfactory receptor family 7 subfamily C 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 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.76

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
OR7C1	NM_001370485.4	c.275T>C	p.Ile92Thr	missense_variant	5/5	ENST00000641666.2
OR7C1	NM_198944.1	c.275T>C	p.Ile92Thr	missense_variant	1/1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
OR7C1	ENST00000641666.2	c.275T>C	p.Ile92Thr	missense_variant	5/5		NM_001370485.4	P1

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152174 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00

GnomAD4 exome Cov.: 34

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152174 Hom.: 0 Cov.: 32 AF XY: 0.0000135 AC XY: 1 AN XY: 74340

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000147

Gnomad4 OTH AF: 0.00

Bravo AF: 0.00000378

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

Apr 05, 2023

The c.275T>C (p.I92T) alteration is located in exon 1 (coding exon 1) of the OR7C1 gene. This alteration results from a T to C substitution at nucleotide position 275, causing the isoleucine (I) at amino acid position 92 to be replaced by a threonine (T). 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	0.47
BayesDel_addAF	Benign	0.0096	T
BayesDel_noAF	Benign	-0.22
CADD	Benign	19
DANN	Uncertain	0.99
DEOGEN2	Benign	0.0093	T;T;T;T
Eigen	Benign	0.083
Eigen_PC	Benign	-0.081
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Uncertain	0.88	.;.;.;D
M_CAP	Benign	0.0025	T
MetaRNN	Pathogenic	0.76	D;D;D;D
MetaSVM	Benign	-1.1	T
MutationAssessor	Pathogenic	3.8	H;H;H;H
MutationTaster	Benign	0.74	N
PrimateAI	Benign	0.32	T
PROVEAN	Pathogenic	-4.9	.;.;.;D
REVEL	Benign	0.18
Sift	Uncertain	0.0060	.;.;.;D
Sift4G	Pathogenic	0.0	.;.;.;D
Polyphen		0.34	B;B;B;B
Vest4		0.65
MutPred		0.68		Loss of stability (P = 0.0539);Loss of stability (P = 0.0539);Loss of stability (P = 0.0539);Loss of stability (P = 0.0539);
MVP		0.37
MPC		0.43
ClinPred		0.91	D
GERP RS		3.5
Varity_R		0.51
gMVP		0.14

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: rs1328220306; hg19: chr19-14910674;