11-124440976-A-G

Variant names:

• chr11-124440976-A-G
• rs146693143
• NM_012378.2:c.110T>C

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_012378.2(OR8B8):​c.110T>C​(p.Val37Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00036 in 1,614,072 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: 𝑓 0.00030 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00037 (0 hom.)
• Consequence: OR8B8 NM_012378.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.75

Genes affected

OR8B8 (HGNC:8477): (olfactory receptor family 8 subfamily B member 8) 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 Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.040972978).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
OR8B8	NM_012378.2	c.110T>C	p.Val37Ala	missense_variant	Exon 3 of 3	ENST00000642064.1	NP_036510.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
OR8B8	ENST00000642064.1	c.110T>C	p.Val37Ala	missense_variant	Exon 3 of 3		NM_012378.2	ENSP00000493014.1
OR8B8	ENST00000328064.2	c.110T>C	p.Val37Ala	missense_variant	Exon 1 of 1	6		ENSP00000330280.2

Frequencies

GnomAD3 genomes AF: 0.000296 AC: 45 AN: 152152 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.000193

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000131

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: 0.000514

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.000223 AC: 56 AN: 251370 Hom.: 0 AF XY: 0.000206 AC XY: 28 AN XY: 135858

Gnomad AFR exome AF: 0.0000616

Gnomad AMR exome AF: 0.000116

Gnomad ASJ exome AF: 0.0000992

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000327

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000422

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.000367 AC: 536 AN: 1461802 Hom.: 0 Cov.: 33 AF XY: 0.000371 AC XY: 270 AN XY: 727200

Gnomad4 AFR exome AF: 0.0000597

Gnomad4 AMR exome AF: 0.0000894

Gnomad4 ASJ exome AF: 0.0000765

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000458

Gnomad4 OTH exome AF: 0.000298

GnomAD4 genome AF: 0.000296 AC: 45 AN: 152270 Hom.: 0 Cov.: 32 AF XY: 0.000242 AC XY: 18 AN XY: 74462

Gnomad4 AFR AF: 0.000193

Gnomad4 AMR AF: 0.000131

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000515

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000415 Hom.: 1

Bravo AF: 0.000302

TwinsUK AF: 0.000539 AC: 2

ALSPAC AF: 0.000259 AC: 1

ESP6500AA AF: 0.00 AC: 0

ESP6500EA AF: 0.000465 AC: 4

ExAC AF: 0.000214 AC: 26

EpiCase AF: 0.000600

EpiControl AF: 0.000415

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Mar 22, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.110T>C (p.V37A) alteration is located in exon 1 (coding exon 1) of the OR8B8 gene. This alteration results from a T to C substitution at nucleotide position 110, causing the valine (V) at amino acid position 37 to be replaced by an alanine (A). 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	0.12
BayesDel_addAF	Benign	-0.48	T
BayesDel_noAF	Benign	-0.60
CADD	Benign	21
DANN	Uncertain	0.99
DEOGEN2	Benign	0.023	T;T
Eigen	Benign	-0.42
Eigen_PC	Benign	-0.32
FATHMM_MKL	Benign	0.50	N
LIST_S2	Benign	0.54	.;T
M_CAP	Benign	0.0036	T
MetaRNN	Benign	0.041	T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.3	L;L
PrimateAI	Benign	0.38	T
PROVEAN	Uncertain	-3.1	.;D
REVEL	Benign	0.082
Sift	Uncertain	0.021	.;D
Sift4G	Benign	0.078	.;T
Polyphen		0.0030	B;B
Vest4		0.14
MVP		0.34
MPC		0.017
ClinPred		0.36	T
GERP RS		3.7
Varity_R		0.13
gMVP		0.24

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: rs146693143; hg19: chr11-124310872; COSMIC: COSV99080329;