15-68229580-T-C

Variant names:

Variant summary

Our verdict is Benign. Variant got -7 ACMG points: 2P and 9B. PM2BP4_StrongBP6BS1

The NM_017882.3(CLN6):c.5A>G(p.Glu2Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000218 in 1,465,056 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00053 ( 0 hom., cov: 34)

Exomes 𝑓: 0.00018 ( 0 hom. )

Consequence

CLN6
NM_017882.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:6B:3

Conservation

PhyloP100: 0.797

Variant links:

Genes affected

CLN6 (HGNC:2077): (CLN6 transmembrane ER protein) This gene is one of eight which have been associated with neuronal ceroid lipofuscinoses (NCL). Also referred to as Batten disease, NCL comprises a class of autosomal recessive, neurodegenerative disorders affecting children. The genes responsible likely encode proteins involved in the degradation of post-translationally modified proteins in lysosomes. The primary defect in NCL disorders is thought to be associated with lysosomal storage function. [provided by RefSeq, Oct 2008]

CLN6 links:

ENSG00000260007 (HGNC:):

ENSG00000260007 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -7 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.012577295).

BP6

Variant 15-68229580-T-C is Benign according to our data. Variant chr15-68229580-T-C is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 205179.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=6, Benign=1, Likely_benign=2}. Variant chr15-68229580-T-C is described in Lovd as [Likely_benign].

BS1

Variant frequency is greater than expected in population eas. gnomad4 allele frequency = 0.000533 (81/151966) while in subpopulation EAS AF= 0.0114 (59/5160). AF 95% confidence interval is 0.0091. There are 0 homozygotes in gnomad4. There are 47 alleles in male gnomad4 subpopulation. Median coverage is 34. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CLN6	NM_017882.3 link	c.5A>G	p.Glu2Gly	missense_variant	Exon 1 of 7	ENST00000249806.11	NP_060352.1	Q9NWW5-1A0A024R601
CLN6	NM_001411068.1 link	c.180-10930A>G		intron_variant	Intron 1 of 6		NP_001397997.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CLN6	ENST00000249806.11 link	c.5A>G	p.Glu2Gly	missense_variant	Exon 1 of 7	1	NM_017882.3	ENSP00000249806.5		Q9NWW5-1
ENSG00000260007	ENST00000562767.2 link	c.5A>G	p.Glu2Gly	missense_variant	Exon 1 of 3	3		ENSP00000456336.1		H3BRN7

Frequencies

GnomAD3 genomes

AF:

0.000533

AC:

AN:

151858

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000435

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.0114

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00144

GnomAD3 exomes

AF:

0.000324

AC:

AN:

80306

Hom.:

AF XY:

0.000283

AC XY:

AN XY:

45872

show subpopulations

Gnomad AFR exome

AF:

0.00105

Gnomad AMR exome

AF:

0.0000619

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00701

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000425

GnomAD4 exome

AF:

0.000182

AC:

239

AN:

1313090

Hom.:

Cov.:

AF XY:

0.000184

AC XY:

119

AN XY:

647624

show subpopulations

Gnomad4 AFR exome

AF:

0.0000756

Gnomad4 AMR exome

AF:

0.0000371

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00646

Gnomad4 SAS exome

AF:

0.000150

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000124

Gnomad4 OTH exome

AF:

0.000609

GnomAD4 genome

AF:

0.000533

AC:

AN:

151966

Hom.:

Cov.:

AF XY:

0.000633

AC XY:

AN XY:

74308

show subpopulations

Gnomad4 AFR

AF:

0.000434

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.0114

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00142

Alfa

AF:

0.000208

Hom.:

Bravo

AF:

0.000676

ExAC

AF:

0.0000809

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:6Benign:3

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:3

Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Jul 25, 2018	A variant of uncertain significance has been identified in the CLN6 gene. The E2G variant has beenreported previously in the homozygous state in an individual with late-infantile neuronal ceroidlipofuscinosis (Di Fruscio et al., 2015). The E2G variant is observed in 13/1008 (1.3%) alleles from individuals of East Asian background (Lek et al., 2016; 1000 Genomes Consortium et al., 2015;Exome Variant Server). The E2G variant is a non-conservative amino acid substitution, which is likely to impact secondary protein structure as these residues differ in polarity, charge, size and/or other properties. Additionally, this substitution occurs at a position that is conserved across species, and in silico analysis predicts this variant is probably damaging to the protein structure/function. Furthermore, missense variants in nearby residues (R5W, R6T) have been reported in the Human GeneMutation Database in association with NCL (Stenson et al., 2014). Based on the currently available information, it is unclear whether this variant is a pathogenic variant or a rare benign variant. -
Uncertain significance, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Jul 30, 2020	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Mayo Clinic Laboratories, Mayo Clinic	Jul 27, 2021	- -

Neuronal ceroid lipofuscinosis

Benign:2

Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 28, 2025	- -
Likely benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Aug 08, 2017	This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). Publications were found based on this search. The evidence from the literature, in combination with allele frequency data from public databases where available, was sufficient to determine this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 26, 2019

The p.E2G variant (also known as c.5A>G), located in coding exon 1 of the CLN6 gene, results from an A to G substitution at nucleotide position 5. The glutamic acid at codon 2 is replaced by glycine, an amino acid with similar properties. This variant was reported as homozygous in an individual with neuronal ceroid lipofuscinosis (Di Fruscio G et al. Autophagy, 2015;11:928-38). This amino acid position is highly conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Ceroid lipofuscinosis, neuronal, 6A

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Counsyl

Jan 25, 2017

- -

Ceroid lipofuscinosis, neuronal, 6A;C5561927:Ceroid lipofuscinosis, neuronal, 6B (Kufs type)

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Apr 11, 2024

- -

Ceroid lipofuscinosis, neuronal, 6B (Kufs type)

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Al Jalila Children’s Genomics Center, Al Jalila Childrens Speciality Hospital

Jul 27, 2020

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.16

BayesDel_addAF

Benign

-0.14

BayesDel_noAF

Uncertain

0.040

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.28

.;T;T;T;T;T;.;.

Eigen

Benign

-0.25

Eigen_PC

Benign

-0.16

FATHMM_MKL

Uncertain

0.90

LIST_S2

Benign

0.50

T;T;T;T;T;T;T;T

MetaRNN

Benign

0.013

T;T;T;T;T;T;T;T

MetaSVM

Uncertain

0.17

MutationAssessor

Benign

1.6

.;L;.;.;.;.;.;.

PrimateAI

Pathogenic

0.88

PROVEAN

Pathogenic

-6.8

D;N;D;N;.;.;N;.

REVEL

Uncertain

0.50

Sift

Uncertain

0.016

.;D;D;D;.;.;D;.

Sift4G

Pathogenic

0.0

D;D;D;D;.;.;D;.

Polyphen

0.24

.;B;.;.;.;.;.;.

Vest4

0.39

MVP

0.88

MPC

0.10

ClinPred

0.079

GERP RS

3.3

Varity_R

0.13

gMVP

0.27

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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