16-28484025-C-T

Variant names:

• chr16-28484025-C-T
• rs73533466
• NM_001042432.2:c.771G>A

Variant summary

Our verdict is Benign. The variant received -21 ACMG points: 0P and 21B. BP4_Strong BP6_Very_Strong BP7 BS1 BS2

The NM_000086.2(CLN3):​c.771G>A​(p.Glu257Glu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000694 in 1,610,562 control chromosomes in the GnomAD database, including 6 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0037 (3 hom., cov: 31)
  • Exomes 𝑓: 0.00038 (3 hom.)
• Consequence: CLN3 NM_000086.2 synonymous
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:8
• Conservation: PhyloP100: -0.125
• Publications: 1 publications found

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: Orphanet, Ambry Genetics, Genomics England PanelApp, G2P, Labcorp Genetics (formerly Invitae), Myriad Women’s Health

ENSG00000261832 (HGNC:):

ACMG classification

Our verdict: Benign. The variant received -21 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.83).
• BP6: Variant 16-28484025-C-T is Benign according to our data. Variant chr16-28484025-C-T is described in ClinVar as Benign. ClinVar VariationId is 136790.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=-0.125 with no splicing effect.
• BS1: Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00367 (558/152212) while in subpopulation AFR AF = 0.0129 (535/41530). AF 95% confidence interval is 0.012. There are 3 homozygotes in GnomAd4. There are 248 alleles in the male GnomAd4 subpopulation. Median coverage is 31. This position passed quality control check.
• BS2: High Homozygotes in GnomAd4 at 3 AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000086.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CLN3	NM_001042432.2	MANE Select	c.771G>A	p.Glu257Glu	synonymous	Exon 10 of 16	NP_001035897.1
	CLN3	NM_000086.2		c.771G>A	p.Glu257Glu	synonymous	Exon 9 of 15	NP_000077.1
	CLN3	NM_001286104.2		c.699G>A	p.Glu233Glu	synonymous	Exon 9 of 15	NP_001273033.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CLN3	ENST00000636147.2	TSL:1 MANE Select	c.771G>A	p.Glu257Glu	synonymous	Exon 10 of 16	ENSP00000490105.1
	CLN3	ENST00000359984.12	TSL:1	c.771G>A	p.Glu257Glu	synonymous	Exon 9 of 15	ENSP00000353073.9
	CLN3	ENST00000565316.6	TSL:1	c.771G>A	p.Glu257Glu	synonymous	Exon 9 of 14	ENSP00000456117.1

Frequencies

GnomAD3 genomes AF: 0.00366 AC: 557 AN: 152094 Hom.: 3 Cov.: 31

Gnomad AFR AF: 0.0129

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000918

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000882

Gnomad OTH AF: 0.00144

GnomAD2 exomes AF: 0.000981 AC: 239 AN: 243532 AF XY: 0.000759

Gnomad AFR exome AF: 0.0132

Gnomad AMR exome AF: 0.000825

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000636

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.000383 AC: 559 AN: 1458350 Hom.: 3 Cov.: 30 AF XY: 0.000309 AC XY: 224 AN XY: 725030

African (AFR) AF: 0.0133 AC: 444 AN: 33432

American (AMR) AF: 0.000836 AC: 37 AN: 44270

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25978

East Asian (EAS) AF: 0.00 AC: 0 AN: 39620

South Asian (SAS) AF: 0.00 AC: 0 AN: 85290

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53228

Middle Eastern (MID) AF: 0.000174 AC: 1 AN: 5746

European-Non Finnish (NFE) AF: 0.0000252 AC: 28 AN: 1110544

Other (OTH) AF: 0.000813 AC: 49 AN: 60242

GnomAD4 genome AF: 0.00367 AC: 558 AN: 152212 Hom.: 3 Cov.: 31 AF XY: 0.00333 AC XY: 248 AN XY: 74416

African (AFR) AF: 0.0129 AC: 535 AN: 41530

American (AMR) AF: 0.000917 AC: 14 AN: 15268

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5166

South Asian (SAS) AF: 0.00 AC: 0 AN: 4832

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10614

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.0000882 AC: 6 AN: 68018

Other (OTH) AF: 0.00142 AC: 3 AN: 2108

Alfa AF: 0.00167 Hom.: 1

Bravo AF: 0.00388

Asia WGS AF: 0.00115 AC: 5 AN: 3478

ClinVar

ClinVar submissions as Germline

Significance: Benign

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	-	4	not provided (4)
-	-	2	not specified (2)
-	-	1	Inborn genetic diseases (1)
-	-	1	Neuronal ceroid lipofuscinosis (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.83
CADD	Benign	0.79
DANN	Benign	0.38
PhyloP100		-0.13
Mutation Taster		=100/0	polymorphism

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: rs73533466; hg19: chr16-28495346;