1-34761289-G-A

Position:

• chr1-34761289-G-A

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM2 PP3_Strong PP5

The NM_153212.3(GJB4):​c.35G>A​(p.Gly12Asp) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 33)
• Consequence: GJB4 NM_153212.3 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:3
• Conservation: PhyloP100: 5.75

Genes affected

GJB4 (HGNC:4286): (gap junction protein beta 4) This gene encodes a transmembrane connexin protein that is a component of gap junctions. Mutations in this gene have been associated with erythrokeratodermia variabilis, progressive symmetric erythrokeratoderma and hearing impairment. [provided by RefSeq, Dec 2009]

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

ACMG classification

Verdict is Likely_pathogenic. Variant got 7 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.981
• PP5: Variant 1-34761289-G-A is Pathogenic according to our data. Variant chr1-34761289-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 5007.Status of the report is no_assertion_criteria_provided, 0 stars. Variant chr1-34761289-G-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GJB4	NM_153212.3	c.35G>A	p.Gly12Asp	missense_variant	2/2	ENST00000339480.3
GJB4	XM_011540679.3	c.35G>A	p.Gly12Asp	missense_variant	2/2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GJB4	ENST00000339480.3	c.35G>A	p.Gly12Asp	missense_variant	2/2	2	NM_153212.3	P1
SMIM12	ENST00000426886.1	c.208-42880C>T		intron_variant, NMD_transcript_variant		1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:3

Revision: no assertion criteria provided

Submissions by phenotype

not provided Pathogenic:2

Pathogenic, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Pathogenic, no assertion criteria provided	clinical testing	Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	-	- -

Erythrokeratodermia variabilis et progressiva 2 Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Apr 01, 2003

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.41
BayesDel_addAF	Pathogenic	0.51	D
BayesDel_noAF	Pathogenic	0.50
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.76	D
Eigen	Pathogenic	0.87
Eigen_PC	Pathogenic	0.82
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.92	D
M_CAP	Uncertain	0.22	D
MetaRNN	Pathogenic	0.98	D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	2.9	M
MutationTaster	Benign	1.0	A
PrimateAI	Uncertain	0.71	T
PROVEAN	Pathogenic	-6.7	D
REVEL	Pathogenic	0.94
Sift	Uncertain	0.0040	D
Sift4G	Uncertain	0.014	D
Polyphen		1.0	D
Vest4		0.67
MutPred		0.94		Loss of glycosylation at S11 (P = 0.0409);
MVP		0.99
MPC		0.53
ClinPred		0.99	D
GERP RS		5.5
Varity_R		0.92
gMVP		0.85

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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

Other links and lift over

dbSNP: rs80358211; hg19: chr1-35226890;