Variant 1-34757454-C-T details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_005268.4(GJB5):c.124C>T(p.Arg42Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,888 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 Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R42H) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

GJB5
NM_005268.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.973

Variant links:

Genes affected

GJB5 (HGNC:4287): (gap junction protein beta 5) This gene encodes a member of the beta-type (group I) connexin family. The encoded protein is a gap junction protein involved in intercellular communication related to epidermal differentiation and environmental sensing. This gene has been linked to non-small cell lung cancer. [provided by RefSeq, Nov 2012]

GJB5 links:

SMIM12 (HGNC:25154): (small integral membrane protein 12) Predicted to be integral component of membrane. [provided by Alliance of Genome Resources, Apr 2022]

SMIM12 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.863

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
GJB5	NM_005268.4 link	c.124C>T	p.Arg42Cys	missense_variant	2/2	ENST00000338513.1	NP_005259.1	O95377A0A654IE64
GJB5	XM_005270751.4 link	c.124C>T	p.Arg42Cys	missense_variant	2/2		XP_005270808.1	O95377A0A654IE64

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
GJB5	ENST00000338513.1 link	c.124C>T	p.Arg42Cys	missense_variant	2/2	1	NM_005268.4	ENSP00000340811.1		O95377
SMIM12	ENST00000426886.1 link	n.208-39045G>A		intron_variant		1		ENSP00000429902.1		E5RH51

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461888

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

727244

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000180

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 14, 2024

The c.124C>T (p.R42C) alteration is located in exon 2 (coding exon 1) of the GJB5 gene. This alteration results from a C to T substitution at nucleotide position 124, causing the arginine (R) at amino acid position 42 to be replaced by a cysteine (C). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.20

BayesDel_addAF

Uncertain

0.096

BayesDel_noAF

Benign

-0.10

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.91

Eigen

Uncertain

0.33

Eigen_PC

Uncertain

0.24

FATHMM_MKL

Benign

0.67

LIST_S2

Pathogenic

0.98

M_CAP

Pathogenic

0.63

MetaRNN

Pathogenic

0.86

MetaSVM

Pathogenic

1.1

MutationAssessor

Pathogenic

3.0

PrimateAI

Benign

0.42

PROVEAN

Pathogenic

-4.8

REVEL

Pathogenic

0.67

Sift

Uncertain

0.012

Sift4G

Uncertain

0.023

Polyphen

1.0

Vest4

0.56

MutPred

0.65

Loss of disorder (P = 0.0475);

MVP

0.93

MPC

0.61

ClinPred

0.98

GERP RS

2.6

Varity_R

0.25

gMVP

0.67

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