rs770732784

Variant names:

• chr4-169713231-A-G
• rs770732784
• NM_001829.4:c.2302A>G

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PP2 PP3

The NM_001829.4(CLCN3):​c.2302A>G​(p.Met768Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000663 in 1,613,958 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 (no stars).

• Frequency:
  • Genomes: 𝑓 0.000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000066 (0 hom.)
• Consequence: CLCN3 NM_001829.4 missense
• Clinical Significance: Uncertain significance no assertion criteria provided U:1
• Conservation: PhyloP100: 9.32
• Publications: 0 publications found

Genes affected

CLCN3 (HGNC:2021): (chloride voltage-gated channel 3) This gene encodes a member of the voltage-gated chloride channel (ClC) family. The encoded protein is present in all cell types and localized in plasma membranes and in intracellular vesicles. It is a multi-pass membrane protein which contains a ClC domain and two additional C-terminal CBS (cystathionine beta-synthase) domains. The ClC domain catalyzes the selective flow of Cl- ions across cell membranes, and the CBS domain may have a regulatory function. This protein plays a role in both acidification and transmitter loading of GABAergic synaptic vesicles, and in smooth muscle cell activation and neointima formation. This protein is required for lysophosphatidic acid (LPA)-activated Cl- current activity and fibroblast-to-myofibroblast differentiation. The protein activity is regulated by Ca(2+)/calmodulin-dependent protein kinase II (CaMKII) in glioma cells. Multiple alternatively spliced transcript variants encoding different isoforms have been identified. [provided by RefSeq, Aug 2011]

CLCN3 Gene-Disease associations (from GenCC):

• complex neurodevelopmental disorder

  Inheritance: AD Classification: STRONG Submitted by: Illumina
• neurodevelopmental disorder with hypotonia and brain abnormalities

  Inheritance: AD Classification: STRONG, MODERATE Submitted by: G2P, Labcorp Genetics (formerly Invitae), Broad Center for Mendelian Genomics, Ambry Genetics
• neurodevelopmental disorder with seizures and brain abnormalities

  Inheritance: AR Classification: LIMITED Submitted by: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PP2: Missense variant in the CLCN3 gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 11 curated pathogenic missense variants (we use a threshold of 10). The gene has 2 curated benign missense variants. Gene score misZ: 4.3745 (above the threshold of 3.09). Trascript score misZ: 5.1954 (above the threshold of 3.09). GenCC associations: The gene is linked to neurodevelopmental disorder with seizures and brain abnormalities, neurodevelopmental disorder with hypotonia and brain abnormalities, complex neurodevelopmental disorder.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.745

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001829.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CLCN3	NM_001829.4	MANE Select	c.2302A>G	p.Met768Val	missense	Exon 12 of 13	NP_001820.2	P51790-1
	CLCN3	NM_173872.4		c.2302A>G	p.Met768Val	missense	Exon 12 of 14	NP_776297.2	P51790-2
	CLCN3	NM_001243372.2		c.2221A>G	p.Met741Val	missense	Exon 11 of 12	NP_001230301.1	P51790-4

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CLCN3	ENST00000513761.6	TSL:1 MANE Select	c.2302A>G	p.Met768Val	missense	Exon 12 of 13	ENSP00000424603.1	P51790-1
	CLCN3	ENST00000347613.9	TSL:1	c.2302A>G	p.Met768Val	missense	Exon 12 of 14	ENSP00000261514.5	P51790-2
	CLCN3	ENST00000898875.1		c.2368A>G	p.Met790Val	missense	Exon 13 of 14	ENSP00000568934.1

Frequencies

GnomAD3 genomes AF: 0.0000657 AC: 10 AN: 152154 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000655

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000622

Gnomad FIN AF: 0.0000942

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000588

Gnomad OTH AF: 0.000479

GnomAD2 exomes AF: 0.0000716 AC: 18 AN: 251342 AF XY: 0.0000810

Gnomad AFR exome AF: 0.000123

Gnomad AMR exome AF: 0.0000289

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000163

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000176

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000664 AC: 97 AN: 1461804 Hom.: 0 Cov.: 31 AF XY: 0.0000619 AC XY: 45 AN XY: 727202

African (AFR) AF: 0.000119 AC: 4 AN: 33478

American (AMR) AF: 0.0000671 AC: 3 AN: 44722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.000101 AC: 4 AN: 39690

South Asian (SAS) AF: 0.000197 AC: 17 AN: 86258

European-Finnish (FIN) AF: 0.0000187 AC: 1 AN: 53418

Middle Eastern (MID) AF: 0.000173 AC: 1 AN: 5768

European-Non Finnish (NFE) AF: 0.0000594 AC: 66 AN: 1111944

Other (OTH) AF: 0.0000166 AC: 1 AN: 60390

GnomAD4 genome AF: 0.0000657 AC: 10 AN: 152154 Hom.: 0 Cov.: 32 AF XY: 0.0000807 AC XY: 6 AN XY: 74328

African (AFR) AF: 0.00 AC: 0 AN: 41444

American (AMR) AF: 0.0000655 AC: 1 AN: 15274

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5188

South Asian (SAS) AF: 0.000622 AC: 3 AN: 4822

European-Finnish (FIN) AF: 0.0000942 AC: 1 AN: 10616

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000588 AC: 4 AN: 68026

Other (OTH) AF: 0.000479 AC: 1 AN: 2088

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000340

ExAC AF: 0.0000824 AC: 10

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
-	1	-	Progressive sensorineural hearing impairment (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.40
BayesDel_addAF	Pathogenic	0.21	D
BayesDel_noAF	Pathogenic	0.37
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.89	D
Eigen	Uncertain	0.42
Eigen_PC	Uncertain	0.51
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Pathogenic	0.30	D
MetaRNN	Pathogenic	0.75	D
MetaSVM	Uncertain	0.38	D
MutationAssessor	Benign	1.4	L
PhyloP100		9.3
PrimateAI	Pathogenic	0.82	D
PROVEAN	Uncertain	-3.8	D
REVEL	Pathogenic	0.88
Sift	Benign	0.038	D
Sift4G	Uncertain	0.055	T
Polyphen		0.80	P
Vest4		0.77
MutPred		0.64		Gain of glycosylation at T766 (P = 0.0304)
MVP		0.96
MPC		1.9
ClinPred		0.16	T
GERP RS		5.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.42
gMVP		0.95
Mutation Taster		=15/85	disease causing

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

Other links and lift over

dbSNP: rs770732784; hg19: chr4-170634382;