rs104893965

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 2P and 3B. PP2PP3BP4_ModerateBP6

The NM_000165.5(GJA1):c.1127G>A(p.Arg376Gln) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000137 in 1,613,066 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R376W) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00018 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00013 ( 1 hom. )

Consequence

GJA1
NM_000165.5 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:2U:4B:3

Conservation

PhyloP100: 9.48

Publications

12 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, SD, AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Orphanet, Labcorp Genetics (formerly Invitae), Ambry Genetics
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: Ambry Genetics, Labcorp Genetics (formerly Invitae), Genomics England PanelApp, G2P
oculodentodigital dysplasia, autosomal recessive
Inheritance: AR Classification: STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
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)
Hallermann-Streiff syndrome
Inheritance: AR Classification: LIMITED Submitted by: G2P
craniometaphyseal dysplasia, autosomal recessive
Inheritance: Unknown, AR Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
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: Likely_benign. The variant received -1 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.

PP3

Multiple lines of computational evidence support a deleterious effect 7: AlphaMissense, BayesDel_addAF, BayesDel_noAF, Dann, phyloP100way_vertebrate, REVEL, REVEL [when max_spliceai, FATHMM_MKL, MetaRNN, MutationTaster, PROVEAN was below the threshold]

BP4

Computational evidence support a benign effect (MetaRNN=0.18377623).

BP6

Variant 6-121447974-G-A is Benign according to our data. Variant chr6-121447974-G-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 16991.

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

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GJA1	NM_000165.5	MANE Select	c.1127G>A	p.Arg376Gln	missense	Exon 2 of 2	NP_000156.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
GJA1	ENST00000282561.4	TSL:1 MANE Select	c.1127G>A	p.Arg376Gln	missense	Exon 2 of 2	ENSP00000282561.3
GJA1	ENST00000647564.1		c.1127G>A	p.Arg376Gln	missense	Exon 2 of 2	ENSP00000497565.1
GJA1	ENST00000649003.1		c.1127G>A	p.Arg376Gln	missense	Exon 2 of 2	ENSP00000497283.1

Frequencies

GnomAD3 genomes

AF:

0.000185

AC:

AN:

151436

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000203

Gnomad ASJ

AF:

0.00433

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.00192

GnomAD2 exomes

AF:

0.000201

AC:

AN:

249350

AF XY:

0.000185

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00418

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000532

Gnomad OTH exome

AF:

0.000165

GnomAD4 exome

AF:

0.000132

AC:

193

AN:

1461630

Hom.:

Cov.:

AF XY:

0.000129

AC XY:

AN XY:

727124

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33470

American (AMR)

AF:

0.0000224

AC:

AN:

44714

Ashkenazi Jewish (ASJ)

AF:

0.00448

AC:

117

AN:

26132

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86244

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53418

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5764

European-Non Finnish (NFE)

AF:

0.0000387

AC:

AN:

1111810

Other (OTH)

AF:

0.000513

AC:

AN:

60378

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.474

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

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:

0.000185

AC:

AN:

151436

Hom.:

Cov.:

AF XY:

0.000162

AC XY:

AN XY:

73878

show subpopulations

African (AFR)

AF:

0.0000242

AC:

AN:

41356

American (AMR)

AF:

0.000203

AC:

AN:

14764

Ashkenazi Jewish (ASJ)

AF:

0.00433

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5164

South Asian (SAS)

AF:

0.00

AC:

AN:

4810

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10574

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000735

AC:

AN:

67990

Other (OTH)

AF:

0.00192

AC:

AN:

2082

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.473

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:

0.000222

Hom.:

Bravo

AF:

0.000204

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000467

AC:

ExAC

AF:

0.000181

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

ClinVar submissions as Germline

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

Hypoplastic left heart syndrome 1 (2)

not provided (2)

Atrioventricular septal defect and common atrioventricular junction (1)

Oculodentodigital dysplasia (1)

Oculodentodigital dysplasia, autosomal recessive (1)

Oculodentodigital dysplasia;C1861366:Syndactyly type 3;C2749477:Oculodentodigital dysplasia, autosomal recessive;C2931244:Craniometaphyseal dysplasia, autosomal recessive;C4304669:Autosomal dominant palmoplantar keratoderma and congenital alopecia;C4479619:Erythrokeratodermia variabilis et progressiva 3 (1)

Syndactyly type 3 (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.71

BayesDel_addAF

Pathogenic

0.30

BayesDel_noAF

Pathogenic

0.35

CADD

Uncertain

(source)

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.58

Eigen

Uncertain

0.62

Eigen_PC

Uncertain

0.66

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.95

M_CAP

Uncertain

0.10

MetaRNN

Benign

0.18

MetaSVM

Uncertain

0.54

MutationAssessor

Uncertain

2.4

PhyloP100

9.5

PrimateAI

Uncertain

0.68

PROVEAN

Benign

-1.6

REVEL

Pathogenic

0.86

Sift

Uncertain

0.029

Sift4G

Pathogenic

0.0

Polyphen

0.98

Vest4

0.68

MVP

0.96

MPC

0.75

ClinPred

0.24

GERP RS

4.9

Varity_R

0.14

gMVP

0.63

Mutation Taster

=44/56

disease causing

(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

ClinVar submissions as Germline

Computational scores

Splicing

Publications

Other links and lift over