Variant X-151739612-G-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BP4_StrongBS2

The NM_005140.3(CNGA2):c.254G>A(p.Arg85Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000545 in 1,209,902 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 23 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. 13/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00017 ( 0 hom., 7 hem., cov: 23)

Exomes 𝑓: 0.000043 ( 0 hom. 16 hem. )

Consequence

CNGA2
NM_005140.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.66

Variant links:

Genes affected

CNGA2 (HGNC:2149): (cyclic nucleotide gated channel subunit alpha 2) The protein encoded by this gene represents the alpha subunit of a cyclic nucleotide-gated olfactory channel. The encoded protein contains a carboxy-terminal leucine zipper that mediates channel formation. [provided by RefSeq, Jan 2010]

CNGA2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -8 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.03427422).

BS2

High Hemizygotes in GnomAd4 at 7 gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CNGA2	NM_005140.3 linkuse as main transcript	c.254G>A	p.Arg85Gln	missense_variant	4/7	ENST00000329903.5	NP_005131.1	Q16280B3KXY3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CNGA2	ENST00000329903.5 linkuse as main transcript	c.254G>A	p.Arg85Gln	missense_variant	4/7	5	NM_005140.3	ENSP00000328478.4		Q16280

Frequencies

GnomAD3 genomes

AF:

0.000170

AC:

AN:

111773

Hom.:

Cov.:

AF XY:

0.000206

AC XY:

AN XY:

33953

show subpopulations

Gnomad AFR

AF:

0.000586

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000188

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000654

AC:

AN:

183360

Hom.:

AF XY:

0.0000737

AC XY:

AN XY:

67800

show subpopulations

Gnomad AFR exome

AF:

0.000456

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000315

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000428

AC:

AN:

1098129

Hom.:

Cov.:

AF XY:

0.0000440

AC XY:

AN XY:

363493

show subpopulations

Gnomad4 AFR exome

AF:

0.000265

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000351

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000119

Gnomad4 OTH exome

AF:

0.000325

GnomAD4 genome

AF:

0.000170

AC:

AN:

111773

Hom.:

Cov.:

AF XY:

0.000206

AC XY:

AN XY:

33953

show subpopulations

Gnomad4 AFR

AF:

0.000586

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000188

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000136

Hom.:

Bravo

AF:

0.000193

ESP6500AA

AF:

0.000782

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000906

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 09, 2024

The c.254G>A (p.R85Q) alteration is located in exon 4 (coding exon 3) of the CNGA2 gene. This alteration results from a G to A substitution at nucleotide position 254, causing the arginine (R) at amino acid position 85 to be replaced by a glutamine (Q). 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

0.079

BayesDel_addAF

Benign

-0.54

BayesDel_noAF

Benign

-0.69

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.10

FATHMM_MKL

Uncertain

0.76

LIST_S2

Benign

0.76

M_CAP

Benign

0.0041

MetaRNN

Benign

0.034

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.69

PrimateAI

Benign

0.23

PROVEAN

Benign

-0.11

REVEL

Benign

0.031

Sift

Benign

0.29

Sift4G

Benign

0.35

Polyphen

0.0020

Vest4

0.025

MVP

0.44

MPC

0.074

ClinPred

0.040

GERP RS

3.5

Varity_R

0.081

gMVP

0.12

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over