rs17653265

Variant names:

Variant summary

Our verdict is Benign. The variant received -19 ACMG points: 1P and 20B. PP2BP4_StrongBP6_Very_StrongBS1BS2

The NM_000165.5(GJA1):c.758C>T(p.Ala253Val) variant causes a missense change. The variant allele was found at a frequency of 0.0132 in 1,613,562 control chromosomes in the GnomAD database, including 209 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. A253A) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0091 ( 10 hom., cov: 32)

Exomes 𝑓: 0.014 ( 199 hom. )

Consequence

GJA1
NM_000165.5 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:8

Conservation

PhyloP100: 3.78

Publications

26 publications found

Variant links:

Genes affected

GJA1 (HGNC:4274): (gap junction protein alpha 1) This gene is a member of the connexin gene family. The encoded protein is a component of gap junctions, which are composed of arrays of intercellular channels that provide a route for the diffusion of low molecular weight materials from cell to cell. The encoded protein is the major protein of gap junctions in the heart that are thought to have a crucial role in the synchronized contraction of the heart and in embryonic development. A related intronless pseudogene has been mapped to chromosome 5. Mutations in this gene have been associated with oculodentodigital dysplasia, autosomal recessive craniometaphyseal dysplasia and heart malformations. [provided by RefSeq, May 2014]

GJA1 Gene-Disease associations (from GenCC):

hypoplastic left heart syndrome 1
Inheritance: AD Classification: DEFINITIVE Submitted by: G2P
oculodentodigital dysplasia
Inheritance: AD, AR, SD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, G2P, Orphanet, Labcorp Genetics (formerly Invitae)
autosomal dominant palmoplantar keratoderma and congenital alopecia
Inheritance: AD Classification: STRONG, SUPPORTIVE, LIMITED Submitted by: Orphanet, Ambry Genetics, Genomics England PanelApp, G2P
erythrokeratodermia variabilis et progressiva 3
Inheritance: AD Classification: STRONG, MODERATE, LIMITED Submitted by: G2P, Ambry Genetics, Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
oculodentodigital dysplasia, autosomal recessive
Inheritance: AR Classification: STRONG, MODERATE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
craniometaphyseal dysplasia
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
erythrokeratodermia variabilis
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
syndactyly type 3
Inheritance: AD, Unknown Classification: SUPPORTIVE, LIMITED Submitted by: Orphanet, Ambry Genetics, Labcorp Genetics (formerly Invitae)
craniometaphyseal dysplasia, autosomal recessive
Inheritance: AR, Unknown Classification: LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
Hallermann-Streiff syndrome
Inheritance: AR Classification: LIMITED Submitted by: G2P
congenital heart disease
Inheritance: Unknown Classification: LIMITED Submitted by: ClinGen
nonsyndromic genetic hearing loss
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

GJA1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -19 ACMG points.

PP2

Missense variant in the GJA1 gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 41 curated pathogenic missense variants (we use a threshold of 10). The gene has 1 curated benign missense variants. Gene score misZ: 1.2784 (below the threshold of 3.09). Trascript score misZ: 3.3775 (above the threshold of 3.09). GenCC associations: The gene is linked to craniometaphyseal dysplasia, autosomal recessive, erythrokeratodermia variabilis et progressiva 3, oculodentodigital dysplasia, autosomal dominant palmoplantar keratoderma and congenital alopecia, hypoplastic left heart syndrome 1, craniometaphyseal dysplasia, syndactyly type 3, oculodentodigital dysplasia, autosomal recessive, nonsyndromic genetic hearing loss, Hallermann-Streiff syndrome, erythrokeratodermia variabilis.

BP4

Computational evidence support a benign effect (MetaRNN=0.004578203).

BP6

Variant 6-121447605-C-T is Benign according to our data. Variant chr6-121447605-C-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 137483.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.00912 (1384/151782) while in subpopulation NFE AF = 0.0161 (1092/67892). AF 95% confidence interval is 0.0153. There are 10 homozygotes in GnomAd4. There are 617 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 10 Unknown,AD,AR,SD gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000165.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GJA1	NM_000165.5	MANE Select	c.758C>T	p.Ala253Val	missense	Exon 2 of 2	NP_000156.1	P17302

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
GJA1	ENST00000282561.4	TSL:1 MANE Select	c.758C>T	p.Ala253Val	missense	Exon 2 of 2	ENSP00000282561.3	P17302
GJA1	ENST00000647564.1		c.758C>T	p.Ala253Val	missense	Exon 2 of 2	ENSP00000497565.1	P17302
GJA1	ENST00000649003.1		c.758C>T	p.Ala253Val	missense	Exon 2 of 2	ENSP00000497283.1	P17302

Frequencies

GnomAD3 genomes

AF:

0.00915

AC:

1388

AN:

151664

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00286

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00761

Gnomad ASJ

AF:

0.00116

Gnomad EAS

AF:

0.000195

Gnomad SAS

AF:

0.000417

Gnomad FIN

AF:

0.00265

Gnomad MID

AF:

0.0127

Gnomad NFE

AF:

0.0161

Gnomad OTH

AF:

0.0111

GnomAD2 exomes

AF:

0.00809

AC:

2035

AN:

251464

AF XY:

0.00823

show subpopulations

Gnomad AFR exome

AF:

0.00172

Gnomad AMR exome

AF:

0.00792

Gnomad ASJ exome

AF:

0.00218

Gnomad EAS exome

AF:

0.0000544

Gnomad FIN exome

AF:

0.00213

Gnomad NFE exome

AF:

0.0139

Gnomad OTH exome

AF:

0.00863

GnomAD4 exome

AF:

0.0136

AC:

19895

AN:

1461780

Hom.:

199

Cov.:

AF XY:

0.0133

AC XY:

9690

AN XY:

727196

show subpopulations

African (AFR)

AF:

0.00263

AC:

AN:

33476

American (AMR)

AF:

0.00780

AC:

349

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00230

AC:

AN:

26136

East Asian (EAS)

AF:

0.000101

AC:

AN:

39700

South Asian (SAS)

AF:

0.00110

AC:

AN:

86254

European-Finnish (FIN)

AF:

0.00268

AC:

143

AN:

53398

Middle Eastern (MID)

AF:

0.00589

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0165

AC:

18298

AN:

1111932

Other (OTH)

AF:

0.0136

AC:

824

AN:

60392

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.483

Heterozygous variant carriers

1137

2274

3410

4547

5684

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

674

1348

2022

2696

3370

<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:

0.00912

AC:

1384

AN:

151782

Hom.:

Cov.:

AF XY:

0.00832

AC XY:

617

AN XY:

74162

show subpopulations

African (AFR)

AF:

0.00285

AC:

118

AN:

41382

American (AMR)

AF:

0.00747

AC:

114

AN:

15266

Ashkenazi Jewish (ASJ)

AF:

0.00116

AC:

AN:

3462

East Asian (EAS)

AF:

0.000195

AC:

AN:

5124

South Asian (SAS)

AF:

0.000418

AC:

AN:

4788

European-Finnish (FIN)

AF:

0.00265

AC:

AN:

10564

Middle Eastern (MID)

AF:

0.00680

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0161

AC:

1092

AN:

67892

Other (OTH)

AF:

0.0110

AC:

AN:

2100

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

146

220

293

366

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

100

<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:

0.0111

Hom.:

Bravo

AF:

0.0101

TwinsUK

AF:

0.0151

AC:

ALSPAC

AF:

0.0176

AC:

ESP6500AA

AF:

0.00182

AC:

ESP6500EA

AF:

0.0160

AC:

138

ExAC

AF:

0.00784

AC:

952

Asia WGS

AF:

0.00346

AC:

AN:

3478

EpiCase

AF:

0.0160

EpiControl

AF:

0.0152

ClinVar

ClinVar submissions

Significance:Benign/Likely benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (3)

not specified (3)

Oculodentodigital dysplasia (1)

Oculodentodigital dysplasia, autosomal recessive (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.067

BayesDel_addAF

Benign

-0.37

BayesDel_noAF

Benign

-0.29

CADD

Benign

(source)

DANN

Uncertain

0.98

DEOGEN2

Benign

0.30

Eigen

Benign

-0.65

Eigen_PC

Benign

-0.56

FATHMM_MKL

Uncertain

0.79

LIST_S2

Benign

0.53

MetaRNN

Benign

0.0046

MetaSVM

Uncertain

-0.21

MutationAssessor

Benign

0.0

PhyloP100

3.8

PrimateAI

Benign

0.37

PROVEAN

Benign

-0.82

REVEL

Benign

0.26

Sift

Benign

0.17

Sift4G

Benign

0.24

Polyphen

0.0080

Vest4

0.12

MVP

0.94

MPC

0.49

ClinPred

0.0070

GERP RS

3.9

Varity_R

0.051

gMVP

0.54

Mutation Taster

=95/5

polymorphism

(source)

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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over