chr11-55638574-T-C

Position:

• chr11-55638574-T-C

Variant summary

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

The NM_001405919.1(OR4P4):​c.217T>C​(p.Ser73Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000224 in 1,341,654 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 25)
  • Exomes 𝑓: 0.0000022 (0 hom.)
• Consequence: OR4P4 NM_001405919.1 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.298

Genes affected

OR4P4 (HGNC:15180): (olfactory receptor family 4 subfamily P member 4) 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 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
OR4P4	NM_001405919.1	c.217T>C	p.Ser73Pro	missense_variant	2/2	ENST00000641760.1
OR4P4	NM_001004124.2	c.217T>C	p.Ser73Pro	missense_variant	1/1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
OR4P4	ENST00000641760.1	c.217T>C	p.Ser73Pro	missense_variant	2/2		NM_001405919.1	P1

Frequencies

GnomAD3 genomes Cov.: 25

GnomAD4 exome AF: 0.00000224 AC: 3 AN: 1341654 Hom.: 0 Cov.: 29 AF XY: 0.00000300 AC XY: 2 AN XY: 667590

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: 9.76e-7

Gnomad4 OTH exome AF: 0.0000360

GnomAD4 genome Cov.: 25

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

Feb 17, 2024

The c.217T>C (p.S73P) alteration is located in exon 1 (coding exon 1) of the OR4P4 gene. This alteration results from a T to C substitution at nucleotide position 217, causing the serine (S) at amino acid position 73 to be replaced by a proline (P). 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	Pathogenic	0.58
BayesDel_addAF	Benign	-0.10	T
BayesDel_noAF	Benign	-0.38
CADD	Benign	22
DANN	Uncertain	0.99
DEOGEN2	Benign	0.0085	T;T
Eigen	Benign	-0.28
Eigen_PC	Benign	-0.55
FATHMM_MKL	Benign	0.086	N
LIST_S2	Benign	0.75	.;T
M_CAP	Benign	0.0016	T
MetaRNN	Uncertain	0.45	T;T
MetaSVM	Benign	-0.97	T
MutationAssessor	Pathogenic	3.5	M;M
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.28	T
PROVEAN	Pathogenic	-4.7	.;D
REVEL	Benign	0.091
Sift	Pathogenic	0.0	.;D
Sift4G	Pathogenic	0.0010	.;D
Polyphen		0.93	P;P
Vest4		0.67
MutPred		0.63		Loss of catalytic residue at S73 (P = 0.0466);Loss of catalytic residue at S73 (P = 0.0466);
MVP		0.29
MPC		0.16
ClinPred		0.77	D
GERP RS		1.4
Varity_R		0.73
gMVP		0.36

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: rs1858417237; hg19: chr11-55406050;