rs74315312

Variant names:

Variant summary

Our verdict is Likely pathogenic. The variant received 7 ACMG points: 7P and 0B. PP2PP3_StrongPP5_Moderate

The NM_020435.4(GJC2):c.268C>T(p.Pro90Ser) variant causes a missense change. The variant allele was found at a frequency of 0.0000155 in 1,611,020 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000016 ( 0 hom. )

Consequence

GJC2
NM_020435.4 missense

Scores

Clinical Significance

Likely pathogenic criteria provided, single submitter P:2

Conservation

PhyloP100: 5.91

Publications

6 publications found

Variant links:

Genes affected

GJC2 (HGNC:17494): (gap junction protein gamma 2) This gene encodes a gap junction protein. Gap junction proteins are members of a large family of homologous connexins and comprise 4 transmembrane, 2 extracellular, and 3 cytoplasmic domains. This gene plays a key role in central myelination and is involved in peripheral myelination in humans. Defects in this gene are the cause of autosomal recessive Pelizaeus-Merzbacher-like disease-1. [provided by RefSeq, Jul 2008]

GJC2 Gene-Disease associations (from GenCC):

hypomyelinating leukodystrophy 2
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
lymphatic malformation 3
Inheritance: AD Classification: STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), G2P
hereditary spastic paraplegia 44
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet
lymphatic malformation
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

GJC2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_pathogenic. The variant received 7 ACMG points.

PP2

Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 19 curated pathogenic missense variants (we use a threshold of 10). The gene has 3 curated benign missense variants. Gene score misZ: 1.8719 (below the threshold of 3.09). Trascript score misZ: -1.3976 (below the threshold of 3.09). GenCC associations: The gene is linked to hypomyelinating leukodystrophy 2, hereditary spastic paraplegia 44, lymphatic malformation 3, lymphatic malformation.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.993

PP5

Variant 1-228158026-C-T is Pathogenic according to our data. Variant chr1-228158026-C-T is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 2072.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GJC2	NM_020435.4 link	c.268C>T	p.Pro90Ser	missense_variant	Exon 2 of 2	ENST00000366714.3	NP_065168.2	Q5T442A0A654IBV7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GJC2	ENST00000366714.3 link	c.268C>T	p.Pro90Ser	missense_variant	Exon 2 of 2	1	NM_020435.4	ENSP00000355675.2		Q5T442

Frequencies

GnomAD3 genomes

AF:

0.00000659

AC:

AN:

151722

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.00000412

AC:

AN:

242738

AF XY:

0.00

show subpopulations

Gnomad AFR exome

AF:

0.00

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:

0.00000930

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000164

AC:

AN:

1459298

Hom.:

Cov.:

AF XY:

0.0000193

AC XY:

AN XY:

725960

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33468

American (AMR)

AF:

0.00

AC:

AN:

44692

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26112

East Asian (EAS)

AF:

0.00

AC:

AN:

39694

South Asian (SAS)

AF:

0.00

AC:

AN:

86140

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51396

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5694

European-Non Finnish (NFE)

AF:

0.0000216

AC:

AN:

1111760

Other (OTH)

AF:

0.00

AC:

AN:

60342

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.479

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:

0.00000659

AC:

AN:

151722

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74104

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41390

American (AMR)

AF:

0.00

AC:

AN:

15254

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3462

East Asian (EAS)

AF:

0.00

AC:

AN:

5186

South Asian (SAS)

AF:

0.00

AC:

AN:

4836

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10460

Middle Eastern (MID)

AF:

0.00

AC:

AN:

312

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

67824

Other (OTH)

AF:

0.00

AC:

AN:

2086

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.625

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:

0.000310

Hom.:

Bravo

AF:

0.00000756

ExAC

AF:

0.00000827

AC:

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Hypomyelinating leukodystrophy 2

Pathogenic:2

Apr 19, 2021

Molecular Diagnostics Lab, Nemours Children's Health, Delaware

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This missense variant (c.268C>T, p.Pro90Ser) has been observed at extremely low frequency in population databases (gnomAD), and has been reported in the literature (PMID 15192806, PMID 17344063). Variant prediction programs suggest a deleterious effect, and functional studies suppoort this (PMID 17344063). The cange has been found in a homozygous state in an affected individual with consanguinous parents, and in another affected individual who has another likely pathogenic variant (c.310delC, p.Arg104Valfs*106). -

Apr 01, 2007

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.99

BayesDel_addAF

Pathogenic

0.55

BayesDel_noAF

Pathogenic

0.56

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.96

Eigen

Uncertain

0.22

Eigen_PC

Benign

0.055

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Pathogenic

0.98

M_CAP

Pathogenic

0.88

MetaRNN

Pathogenic

0.99

MetaSVM

Pathogenic

1.1

MutationAssessor

Pathogenic

4.2

PhyloP100

5.9

PrimateAI

Pathogenic

0.88

PROVEAN

Pathogenic

-7.4

REVEL

Pathogenic

0.87

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0

Polyphen

0.81

Vest4

0.83

MutPred

0.97

Gain of catalytic residue at P90 (P = 0.0069);

MVP

0.94

ClinPred

1.0

GERP RS

3.3

Varity_R

0.84

gMVP

0.99

Mutation Taster

=45/55

disease causing (ClinVar)

(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

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over