chr11-55343234-C-T

Variant names:

• chr11-55343234-C-T
• rs1853447185
• NM_001005274.1:c.34C>T

Variant summary

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

The NM_001005274.1(OR4A16):​c.34C>T​(p.Leu12Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: OR4A16 NM_001005274.1 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.525
• Publications: 0 publications found

Genes affected

OR4A16 (HGNC:15153): (olfactory receptor family 4 subfamily A member 16) 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

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=0.15007383).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
OR4A16	NM_001005274.1	c.34C>T	p.Leu12Phe	missense_variant	Exon 1 of 1	ENST00000314721.5	NP_001005274.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
OR4A16	ENST00000314721.5	c.34C>T	p.Leu12Phe	missense_variant	Exon 1 of 1	6	NM_001005274.1	ENSP00000325128.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Sep 27, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.34C>T (p.L12F) alteration is located in exon 1 (coding exon 1) of the OR4A16 gene. This alteration results from a C to T substitution at nucleotide position 34, causing the leucine (L) at amino acid position 12 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	0.085
BayesDel_addAF	Benign	-0.21	T
BayesDel_noAF	Benign	-0.54
CADD	Benign	19
DANN	Uncertain	0.99
DEOGEN2	Benign	0.048	T
Eigen	Benign	-0.56
Eigen_PC	Benign	-0.67
FATHMM_MKL	Benign	0.24	N
LIST_S2	Benign	0.83	T
M_CAP	Benign	0.0010	T
MetaRNN	Benign	0.15	T
MetaSVM	Benign	-0.94	T
MutationAssessor	Benign	1.9	L
PhyloP100		-0.53
PrimateAI	Benign	0.29	T
PROVEAN	Uncertain	-3.2	D
REVEL	Benign	0.087
Sift	Benign	0.065	T
Sift4G	Benign	0.13	T
Polyphen		0.55	P
Vest4		0.11
MutPred		0.56		Gain of sheet (P = 0.0827);
MVP		0.076
MPC		0.0012
ClinPred		0.58	D
GERP RS		2.4
PromoterAI		0.0081	Neutral
Varity_R		0.16
gMVP		0.029
Mutation Taster		=96/4	polymorphism

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

Other links and lift over

dbSNP: rs1853447185; hg19: chr11-55110710; COSMIC: COSV59042627;