1-228157866-C-T

Variant names:

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BS1BS2

The NM_020435.4(GJC2):c.108C>T(p.Ile36Ile) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00208 in 1,611,550 control chromosomes in the GnomAD database, including 73 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.011 ( 40 hom., cov: 32)

Exomes 𝑓: 0.0011 ( 33 hom. )

Consequence

GJC2
NM_020435.4 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:6

Conservation

PhyloP100: -1.49

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.79).

BP6

Variant 1-228157866-C-T is Benign according to our data. Variant chr1-228157866-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 235758.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr1-228157866-C-T is described in Lovd as [Benign].

BP7

Synonymous conserved (PhyloP=-1.49 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.011 (1682/152252) while in subpopulation AFR AF= 0.0386 (1603/41560). AF 95% confidence interval is 0.037. There are 40 homozygotes in gnomad4. There are 795 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 40 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GJC2	NM_020435.4 link	c.108C>T	p.Ile36Ile	synonymous_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.108C>T	p.Ile36Ile	synonymous_variant	Exon 2 of 2	1	NM_020435.4	ENSP00000355675.2		Q5T442

Frequencies

GnomAD3 genomes

AF:

0.0110

AC:

1676

AN:

152144

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0385

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00399

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.00527

GnomAD3 exomes

AF:

0.00293

AC:

717

AN:

244924

Hom.:

AF XY:

0.00210

AC XY:

280

AN XY:

133302

show subpopulations

Gnomad AFR exome

AF:

0.0405

Gnomad AMR exome

AF:

0.00193

Gnomad ASJ exome

AF:

0.000101

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000133

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000726

Gnomad OTH exome

AF:

0.00216

GnomAD4 exome

AF:

0.00115

AC:

1673

AN:

1459298

Hom.:

Cov.:

AF XY:

0.00101

AC XY:

732

AN XY:

725770

show subpopulations

Gnomad4 AFR exome

AF:

0.0407

Gnomad4 AMR exome

AF:

0.00213

Gnomad4 ASJ exome

AF:

0.0000768

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000256

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000342

Gnomad4 OTH exome

AF:

0.00234

GnomAD4 genome

AF:

0.0110

AC:

1682

AN:

152252

Hom.:

Cov.:

AF XY:

0.0107

AC XY:

795

AN XY:

74452

show subpopulations

Gnomad4 AFR

AF:

0.0386

Gnomad4 AMR

AF:

0.00399

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000414

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.00521

Alfa

AF:

0.00617

Hom.:

Bravo

AF:

0.0124

Asia WGS

AF:

0.00261

AC:

AN:

3464

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:6

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Nov 22, 2023

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

May 21, 2015

Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not specified

Benign:1

Sep 28, 2017

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Spastic paraplegia

Benign:1

Jan 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Hereditary spastic paraplegia

Benign:1

Feb 01, 2020

Genome Diagnostics Laboratory, The Hospital for Sick Children

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Hypomyelinating leukodystrophy 2;C2750784:Hereditary spastic paraplegia 44;C4747646:Lymphatic malformation 3

Benign:1

Sep 27, 2021

Fulgent Genetics, Fulgent Genetics

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

-0.79

CADD

Benign

5.4

DANN

Benign

0.74

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over