chr16-28488643-G-A

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 8P and 5B. PVS1BS1_SupportingBS2

The NM_001286105.2(CLN3):c.22C>T(p.Arg8*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000351 in 1,614,136 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. R8R) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00034 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00035 ( 2 hom. )

Consequence

CLN3
NM_001286105.2 stop_gained

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:14B:1

Conservation

PhyloP100: 1.95

Publications

7 publications found

Variant links:

Genes affected

CLN3 (HGNC:2074): (CLN3 lysosomal/endosomal transmembrane protein, battenin) This gene encodes a protein that is involved in lysosomal function. Mutations in this, as well as other neuronal ceroid-lipofuscinosis (CLN) genes, cause neurodegenerative diseases commonly known as Batten disease or collectively known as neuronal ceroid lipofuscinoses (NCLs). Many alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Jul 2008]

CLN3 Gene-Disease associations (from GenCC):

inherited retinal dystrophy
Inheritance: AR Classification: DEFINITIVE Submitted by: G2P
neuronal ceroid lipofuscinosis
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
neuronal ceroid lipofuscinosis 3
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, Genomics England PanelApp, G2P, Myriad Women’s Health, Labcorp Genetics (formerly Invitae), Orphanet

CLN3 links:

ENSG00000261832 (HGNC:):

ENSG00000261832 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

PVS1

Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant located near the start codon (<100nt), not predicted to undergo nonsense mediated mRNA decay. There are 107 pathogenic variants in the truncated region.

BS1

Variant frequency is greater than expected in population sas. GnomAd4 allele frequency = 0.000341 (52/152270) while in subpopulation SAS AF = 0.000829 (4/4828). AF 95% confidence interval is 0.000283. There are 0 homozygotes in GnomAd4. There are 24 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

BS2

High Homozygotes in GnomAdExome4 at 2 AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001286105.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
CLN3	NM_001042432.2	MANE Select	c.242C>T	p.Pro81Leu	missense	Exon 5 of 16	NP_001035897.1	Q13286-1
CLN3	NM_001286105.2		c.22C>T	p.Arg8*	stop_gained	Exon 3 of 13	NP_001273034.1	B4DMY6
CLN3	NM_000086.2		c.242C>T	p.Pro81Leu	missense	Exon 4 of 15	NP_000077.1	Q13286-1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
CLN3	ENST00000636147.2	TSL:1 MANE Select	c.242C>T	p.Pro81Leu	missense	Exon 5 of 16	ENSP00000490105.1	Q13286-1
CLN3	ENST00000359984.12	TSL:1	c.242C>T	p.Pro81Leu	missense	Exon 4 of 15	ENSP00000353073.9	Q13286-1
CLN3	ENST00000565316.6	TSL:1	c.242C>T	p.Pro81Leu	missense	Exon 4 of 14	ENSP00000456117.1	Q13286-3

Frequencies

GnomAD3 genomes

AF:

0.000342

AC:

AN:

152152

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000290

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00173

Gnomad EAS

AF:

0.000770

Gnomad SAS

AF:

0.000828

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000338

Gnomad OTH

AF:

0.00144

GnomAD2 exomes

AF:

0.000588

AC:

148

AN:

251494

AF XY:

0.000743

show subpopulations

Gnomad AFR exome

AF:

0.000369

Gnomad AMR exome

AF:

0.000347

Gnomad ASJ exome

AF:

0.00248

Gnomad EAS exome

AF:

0.000272

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000510

Gnomad OTH exome

AF:

0.000814

GnomAD4 exome

AF:

0.000352

AC:

515

AN:

1461866

Hom.:

Cov.:

AF XY:

0.000451

AC XY:

328

AN XY:

727242

show subpopulations

African (AFR)

AF:

0.000239

AC:

AN:

33480

American (AMR)

AF:

0.000291

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00245

AC:

AN:

26136

East Asian (EAS)

AF:

0.000101

AC:

AN:

39700

South Asian (SAS)

AF:

0.00131

AC:

113

AN:

86256

European-Finnish (FIN)

AF:

0.0000187

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00260

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000222

AC:

247

AN:

1111988

Other (OTH)

AF:

0.000828

AC:

AN:

60394

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.448

Heterozygous variant carriers

102

128

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000341

AC:

AN:

152270

Hom.:

Cov.:

AF XY:

0.000322

AC XY:

AN XY:

74454

show subpopulations

African (AFR)

AF:

0.000289

AC:

AN:

41540

American (AMR)

AF:

0.00

AC:

AN:

15292

Ashkenazi Jewish (ASJ)

AF:

0.00173

AC:

AN:

3470

East Asian (EAS)

AF:

0.000772

AC:

AN:

5184

South Asian (SAS)

AF:

0.000829

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10620

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000338

AC:

AN:

68022

Other (OTH)

AF:

0.00142

AC:

AN:

2110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.499

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000495

Hom.:

Bravo

AF:

0.000302

ESP6500AA

AF:

0.000228

AC:

ESP6500EA

AF:

0.000581

AC:

ExAC

AF:

0.000610

AC:

Asia WGS

AF:

0.000577

AC:

AN:

3478

EpiCase

AF:

0.000545

EpiControl

AF:

0.000889

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (7)

Neuronal ceroid lipofuscinosis 3 (3)

Neuronal ceroid lipofuscinosis (2)

Inborn genetic diseases (1)

Neuronal Ceroid-Lipofuscinosis, Dominant/Recessive (1)

Progressive myoclonic epilepsy type 3 (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.064

BayesDel_addAF

Benign

-0.16

BayesDel_noAF

Uncertain

-0.050

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.74

Eigen

Benign

-0.43

Eigen_PC

Benign

-0.51

FATHMM_MKL

Benign

0.11

LIST_S2

Benign

0.82

MetaRNN

Benign

0.010

MetaSVM

Benign

-0.95

MutationAssessor

Uncertain

2.5

PhyloP100

1.9

PrimateAI

Benign

0.37

PROVEAN

Benign

-2.0

REVEL

Uncertain

0.39

Sift

Benign

0.077

Sift4G

Benign

0.12

Polyphen

0.97

Vest4

0.33

MVP

0.95

MPC

0.16

ClinPred

0.040

GERP RS

4.4

Varity_R

0.071

gMVP

0.39

Mutation Taster

=83/117

disease causing (fs/PTC)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over