16-28482173-C-G

Variant names:

• chr16-28482173-C-G
• rs386833744
• NM_001042432.2:c.988G>C

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PM1 PM2 PM5 PP3_Strong

The NM_001042432.2(CLN3):​c.988G>C​(p.Val330Leu) 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V330I) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 31)
• Consequence: CLN3 NM_001042432.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 6.31
• Publications: 0 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: G2P, Labcorp Genetics (formerly Invitae), Genomics England PanelApp, Myriad Women’s Health, Ambry Genetics, Orphanet

ENSG00000261832 (HGNC:):

ACMG classification

Our verdict: Pathogenic. The variant received 10 ACMG points.

• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 7 uncertain in NM_001042432.2
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr16-28482173-C-T is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 205095.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.975

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001042432.2. 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
	CLN3	NM_001042432.2	MANE Select	c.988G>C	p.Val330Leu	missense	Exon 14 of 16	NP_001035897.1	Q13286-1
	CLN3	NM_000086.2		c.988G>C	p.Val330Leu	missense	Exon 13 of 15	NP_000077.1	Q13286-1
	CLN3	NM_001286104.2		c.916G>C	p.Val306Leu	missense	Exon 13 of 15	NP_001273033.1	Q13286-7

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CLN3	ENST00000636147.2	TSL:1 MANE Select	c.988G>C	p.Val330Leu	missense	Exon 14 of 16	ENSP00000490105.1	Q13286-1
	CLN3	ENST00000359984.12	TSL:1	c.988G>C	p.Val330Leu	missense	Exon 13 of 15	ENSP00000353073.9	Q13286-1
	CLN3	ENST00000565316.6	TSL:1	c.937G>C	p.Val313Leu	missense	Exon 12 of 14	ENSP00000456117.1	Q13286-3

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.96
BayesDel_addAF	Pathogenic	0.53	D
BayesDel_noAF	Pathogenic	0.52
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.98	D
Eigen	Pathogenic	0.71
Eigen_PC	Uncertain	0.57
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Pathogenic	0.98	D
M_CAP	Pathogenic	0.75	D
MetaRNN	Pathogenic	0.98	D
MetaSVM	Pathogenic	1.2	D
MutationAssessor	Pathogenic	4.0	H
PhyloP100		6.3
PrimateAI	Uncertain	0.60	T
PROVEAN	Uncertain	-2.6	D
REVEL	Pathogenic	0.84
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.81
MutPred		0.88		Loss of MoRF binding (P = 0.106)
MVP		0.93
MPC		0.63
ClinPred		1.0	D
GERP RS		5.4
PromoterAI		0.023	Neutral
Varity_R		0.94
gMVP		0.81

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.060		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: rs386833744; hg19: chr16-28493494;