Genetic Variant NM_001298.3:c.102-16A>C (chr2-98377671-A-C) – ACMG Classification: Likely_benign (-6 pts)

Variant summary

Our verdict is Likely benign. The variant received -6 ACMG points: 0P and 6B. BP4_StrongBP6_Moderate

The NM_001298.3(CNGA3):c.102-16A>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000143 in 1,607,228 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: 𝑓 0.000079 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000076 ( 0 hom. )

Consequence

CNGA3
NM_001298.3 intron

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 0.592

Publications

5 publications found

Variant links:

Genes affected

CNGA3 (HGNC:2150): (cyclic nucleotide gated channel subunit alpha 3) This gene encodes a member of the cyclic nucleotide-gated cation channel protein family which is required for normal vision and olfactory signal transduction. Mutations in this gene are associated with achromatopsia (rod monochromacy) and color blindness. Two alternatively spliced transcripts encoding different isoforms have been described. [provided by RefSeq, Jul 2008]

CNGA3 Gene-Disease associations (from GenCC):

achromatopsia 2
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae), Illumina, PanelApp Australia
CNGA3-related retinopathy
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
cone-rod dystrophy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
achromatopsia
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

CNGA3 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -6 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.82).

BP6

Variant 2-98377671-A-C is Benign according to our data. Variant chr2-98377671-A-C is described in ClinVar as Likely_benign. ClinVar VariationId is 1651090.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CNGA3	NM_001298.3 link	c.102-16A>C		intron_variant	Intron 2 of 7	ENST00000272602.7	NP_001289.1	Q16281-1

Ensembl

Gene	Transcript	HGVSc	Effect	Exon rank	TSL	MANE	Protein	UniProt
CNGA3	ENST00000272602.7 link	c.102-16A>C	intron_variant	Intron 2 of 7	1	NM_001298.3	ENSP00000272602.2	Q16281-1
CNGA3	ENST00000436404.6 link	c.102-16A>C	intron_variant	Intron 2 of 6	1		ENSP00000410070.2	Q16281-2
CNGA3	ENST00000409937.1 link	n.90-16A>C	intron_variant	Intron 1 of 7	2

Frequencies

GnomAD3 genomes

AF:

0.0000789

AC:

AN:

152128

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000290

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000205

AC:

AN:

243392

AF XY:

0.0000228

show subpopulations

Gnomad AFR exome

AF:

0.000323

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000756

AC:

AN:

1455100

Hom.:

Cov.:

AF XY:

0.00000691

AC XY:

AN XY:

723346

show subpopulations

African (AFR)

AF:

0.000300

AC:

AN:

33356

American (AMR)

AF:

0.00

AC:

AN:

44338

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26014

East Asian (EAS)

AF:

0.00

AC:

AN:

39580

South Asian (SAS)

AF:

0.00

AC:

AN:

84912

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53036

Middle Eastern (MID)

AF:

0.000194

AC:

AN:

5148

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1108614

Other (OTH)

AF:

0.00

AC:

AN:

60102

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.534

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000789

AC:

AN:

152128

Hom.:

Cov.:

AF XY:

0.0000942

AC XY:

AN XY:

74302

show subpopulations

African (AFR)

AF:

0.000290

AC:

AN:

41430

American (AMR)

AF:

0.00

AC:

AN:

15272

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5192

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10594

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68020

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

381

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Benign:1

Nov 09, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.82

CADD

Benign

5.3

(source)

DANN

Benign

0.67

PhyloP100

0.59

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over