X-71224145-G-A

Variant names:

Variant summary

Our verdict is Benign. The variant received -10 ACMG points: 0P and 10B. BP4_StrongBP6_ModerateBS2

The NM_000166.6(GJB1):c.438G>A(p.Glu146Glu) variant causes a synonymous change. The variant allele was found at a frequency of 0.00000998 in 1,202,929 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 3 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: 𝑓 0.000027 ( 0 hom., 1 hem., cov: 22)

Exomes 𝑓: 0.0000082 ( 0 hom. 2 hem. )

Consequence

GJB1
NM_000166.6 synonymous

Scores

Clinical Significance

Likely benign criteria provided, single submitter U:1B:1

Conservation

PhyloP100: 4.28

Publications

0 publications found

Variant links:

Genes affected

GJB1 (HGNC:4283): (gap junction protein beta 1) This gene encodes a member of the gap junction protein family. The gap junction proteins are membrane-spanning proteins that assemble to form gap junction channels that facilitate the transfer of ions and small molecules between cells. According to sequence similarities at the nucleotide and amino acid levels, the gap junction proteins are divided into two categories, alpha and beta. Mutations in this gene cause X-linked Charcot-Marie-Tooth disease, an inherited peripheral neuropathy. Alternatively spliced transcript variants encoding the same protein have been found for this gene. [provided by RefSeq, Oct 2008]

GJB1 Gene-Disease associations (from GenCC):

Charcot-Marie-Tooth disease X-linked dominant 1
Inheritance: XL Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: Orphanet, PanelApp Australia, ClinGen, Labcorp Genetics (formerly Invitae)
X-linked progressive cerebellar ataxia
Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet

GJB1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -10 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.59).

BP6

Variant X-71224145-G-A is Benign according to our data. Variant chrX-71224145-G-A is described in ClinVar as Likely_benign. ClinVar VariationId is 406231.Status of the report is criteria_provided_single_submitter, 1 stars.

BS2

High Hemizygotes in GnomAdExome4 at 2 XL gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000166.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
GJB1	NM_000166.6	MANE Select	c.438G>A	p.Glu146Glu	synonymous	Exon 2 of 2	NP_000157.1
GJB1	NM_001097642.3		c.438G>A	p.Glu146Glu	synonymous	Exon 2 of 2	NP_001091111.1
GJB1	NM_001440770.1		c.438G>A	p.Glu146Glu	synonymous	Exon 3 of 3	NP_001427699.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
GJB1	ENST00000361726.7	TSL:1 MANE Select	c.438G>A	p.Glu146Glu	synonymous	Exon 2 of 2	ENSP00000354900.6
GJB1	ENST00000374029.2	TSL:5	c.438G>A	p.Glu146Glu	synonymous	Exon 2 of 2	ENSP00000363141.1
GJB1	ENST00000447581.2	TSL:5	c.438G>A	p.Glu146Glu	synonymous	Exon 3 of 3	ENSP00000407223.2

Frequencies

GnomAD3 genomes

AF:

0.0000272

AC:

AN:

110358

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000967

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:

0.0000379

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.00000593

AC:

AN:

168635

AF XY:

0.00

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000384

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:

0.00000824

AC:

AN:

1092571

Hom.:

Cov.:

AF XY:

0.00000558

AC XY:

AN XY:

358527

show subpopulations

African (AFR)

AF:

0.0000380

AC:

AN:

26348

American (AMR)

AF:

0.0000291

AC:

AN:

34412

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19255

East Asian (EAS)

AF:

0.00

AC:

AN:

30037

South Asian (SAS)

AF:

0.00

AC:

AN:

53103

European-Finnish (FIN)

AF:

0.00

AC:

AN:

40079

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4132

European-Non Finnish (NFE)

AF:

0.00000834

AC:

AN:

839290

Other (OTH)

AF:

0.00

AC:

AN:

45915

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.504

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:

0.0000272

AC:

AN:

110358

Hom.:

Cov.:

AF XY:

0.0000307

AC XY:

AN XY:

32620

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

30296

American (AMR)

AF:

0.0000967

AC:

AN:

10341

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

2639

East Asian (EAS)

AF:

0.00

AC:

AN:

3492

South Asian (SAS)

AF:

0.00

AC:

AN:

2535

European-Finnish (FIN)

AF:

0.00

AC:

AN:

5960

Middle Eastern (MID)

AF:

0.00

AC:

AN:

237

European-Non Finnish (NFE)

AF:

0.0000379

AC:

AN:

52716

Other (OTH)

AF:

0.00

AC:

AN:

1469

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

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.:

Bravo

AF:

0.0000151

ClinVar

Significance: Likely benign

Submissions summary: Uncertain:1Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Charcot-Marie-Tooth disease

Uncertain:1

Mar 03, 2020

Natera, Inc.

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:clinical testing

Charcot-Marie-Tooth Neuropathy X

Benign:1

Sep 29, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.59

CADD

Benign

5.3

(source)

DANN

Benign

0.38

PhyloP100

4.3

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

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

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over