chr11-55819768-A-T

Position:

• chr11-55819768-A-T

Variant summary

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

The NM_001001952.1(OR5D18):​c.139A>T​(p.Ile47Phe) 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 1,461,760 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: OR5D18 NM_001001952.1 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.697

Genes affected

OR5D18 (HGNC:15285): (olfactory receptor family 5 subfamily D member 18) 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=0.21060252).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
OR5D18	NM_001001952.1	c.139A>T	p.Ile47Phe	missense_variant	1/1	ENST00000333976.7	NP_001001952.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
OR5D18	ENST00000333976.7	c.139A>T	p.Ile47Phe	missense_variant	1/1	6	NM_001001952.1	ENSP00000335025.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461760 Hom.: 0 Cov.: 35 AF XY: 0.00000138 AC XY: 1 AN XY: 727186

Gnomad4 AFR exome AF: 0.0000598

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: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000756

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 20, 2024

The c.139A>T (p.I47F) alteration is located in exon 1 (coding exon 1) of the OR5D18 gene. This alteration results from a A to T substitution at nucleotide position 139, causing the isoleucine (I) at amino acid position 47 to be replaced by a phenylalanine (F). 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	0.13
BayesDel_addAF	Benign	-0.14	T
BayesDel_noAF	Benign	-0.44
CADD	Benign	22
DANN	Benign	0.97
DEOGEN2	Benign	0.016	T
Eigen	Benign	0.063
Eigen_PC	Benign	-0.0026
FATHMM_MKL	Benign	0.35	N
LIST_S2	Uncertain	0.87	D
M_CAP	Benign	0.0026	T
MetaRNN	Benign	0.21	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Uncertain	2.8	M
PrimateAI	Benign	0.28	T
PROVEAN	Uncertain	-3.4	D
REVEL	Benign	0.13
Sift	Uncertain	0.010	D
Sift4G	Uncertain	0.013	D
Polyphen		0.50	P
Vest4		0.27
MutPred		0.52		Loss of methylation at K51 (P = 0.1157);
MVP		0.44
MPC		0.33
ClinPred		0.92	D
GERP RS		4.9
Varity_R		0.22
gMVP		0.35

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		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: rs946951910; hg19: chr11-55587244;