11-4803878-C-T

Variant names:

• chr11-4803878-C-T
• rs755387358
• NM_001005177.3:c.503G>A

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001005177.3(OR52R1):​c.503G>A​(p.Arg168Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,872 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/19 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R168T) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 29)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: OR52R1 NM_001005177.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.472
• Publications: 1 publications found

Genes affected

OR52R1 (HGNC:15235): (olfactory receptor family 52 subfamily R 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. This olfactory receptor gene is a segregating pseudogene, where some individuals have an allele that encodes a functional olfactory receptor, while other individuals have an allele encoding a protein that is predicted to be non-functional. [provided by RefSeq, Jun 2015]

MMP26 (HGNC:14249): (matrix metallopeptidase 26) Proteins of the matrix metalloproteinase (MMP) family are involved in the breakdown of extracellular matrix in normal physiological processes, such as embryonic development, reproduction, and tissue remodeling, as well as in disease processes, such as arthritis and metastasis. The encoded preproprotein is proteolytically processed to generate the mature enzyme. This enzyme may degrade collagen type IV, fibronectin, fibrinogen, and beta-casein, and activate matrix metalloproteinase-9 by cleavage. The protein differs from most MMP family members in that it lacks a conserved C-terminal protein domain. The encoded protein may promote cell invasion in multiple human cancers. [provided by RefSeq, May 2016]

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.11675784).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001005177.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	OR52R1	NM_001005177.3	MANE Select	c.503G>A	p.Arg168Lys	missense	Exon 1 of 1	NP_001005177.3	Q8NGF1
	MMP26	NM_021801.5	MANE Select	c.-145+36537C>T		intron	N/A	NP_068573.2	Q9NRE1
	MMP26	NM_001384608.1		c.-153+36537C>T		intron	N/A	NP_001371537.1	A0A8J8YUH5

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	OR52R1	ENST00000624978.1	TSL:6 MANE Select	c.503G>A	p.Arg168Lys	missense	Exon 1 of 1	ENSP00000485292.1	Q8NGF1
	MMP26	ENST00000380390.6	TSL:5 MANE Select	c.-145+36537C>T		intron	N/A	ENSP00000369753.1	Q9NRE1
	MMP26	ENST00000300762.2	TSL:1	c.-153+36537C>T		intron	N/A	ENSP00000300762.2	A0A8J8YUH5

Frequencies

GnomAD3 genomes Cov.: 29

GnomAD2 exomes AF: 0.00000399 AC: 1 AN: 250644 AF XY: 0.00000738

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 FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000885

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461872 Hom.: 0 Cov.: 43 AF XY: 0.00000138 AC XY: 1 AN XY: 727230

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53404

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1112006

Other (OTH) AF: 0.00 AC: 0 AN: 60396

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 29

ExAC AF: 0.00000824 AC: 1

EpiCase AF: 0.00

EpiControl AF: 0.0000593

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.25	T
BayesDel_noAF	Benign	-0.60
CADD	Benign	19
DANN	Uncertain	0.99
DEOGEN2	Benign	0.0044	T
Eigen	Benign	-0.10
Eigen_PC	Benign	-0.0055
FATHMM_MKL	Benign	0.52	D
LIST_S2	Benign	0.54	T
M_CAP	Benign	0.0012	T
MetaRNN	Benign	0.12	T
MetaSVM	Benign	-0.97	T
MutationAssessor	Uncertain	2.1	M
PhyloP100		0.47
PrimateAI	Benign	0.29	T
Polyphen		0.0050	B
MutPred		0.51		Gain of methylation at R168 (P = 0.0338)
ClinPred		0.70	D
GERP RS		5.6
Varity_R		0.26
gMVP		0.18
Mutation Taster		=92/8	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs755387358; hg19: chr11-4825108; COSMIC: COSV100617716;