15-68211718-A-T

Variant names:

• chr15-68211718-A-T
• rs1555438678
• NM_017882.3:c.443T>A

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM1 PM2 PP3_Moderate

The NM_017882.3(CLN6):​c.443T>A​(p.Val148Asp) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (no stars). Synonymous variant affecting the same amino acid position (i.e. V148V) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CLN6 NM_017882.3 missense
• Clinical Significance: Uncertain significance no assertion criteria provided U:1
• Conservation: PhyloP100: 8.79
• Publications: 1 publications found

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 Gene-Disease associations (from GenCC):

• ceroid lipofuscinosis, neuronal, 6A

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Laboratory for Molecular Medicine, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), G2P, Myriad Women’s Health, Orphanet
• ceroid lipofuscinosis, neuronal, 6B (Kufs type)

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Genomics England PanelApp, G2P, Orphanet
• neuronal ceroid lipofuscinosis

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen

ENSG00000260007 (HGNC:):

ACMG classification

Our verdict: Likely_pathogenic. The variant received 6 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, 4 uncertain in NM_017882.3
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.919

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_017882.3. 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
	CLN6	NM_017882.3	MANE Select	c.443T>A	p.Val148Asp	missense	Exon 4 of 7	NP_060352.1
	CLN6	NM_001411068.1		c.539T>A	p.Val180Asp	missense	Exon 4 of 7	NP_001397997.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CLN6	ENST00000249806.11	TSL:1 MANE Select	c.443T>A	p.Val148Asp	missense	Exon 4 of 7	ENSP00000249806.5
	CLN6	ENST00000637667.1	TSL:1	c.344T>A	p.Val115Asp	missense	Exon 3 of 6	ENSP00000489843.1
	CLN6	ENST00000638076.1	TSL:1	n.443T>A		non_coding_transcript_exon	Exon 4 of 7	ENSP00000490373.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
-	1	-	Ceroid lipofuscinosis, neuronal, 6A (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.53	D
BayesDel_noAF	Pathogenic	0.52
CADD	Pathogenic	29
DANN	Uncertain	0.98
DEOGEN2	Pathogenic	0.96	D
Eigen	Uncertain	0.54
Eigen_PC	Uncertain	0.50
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Uncertain	0.97	D
M_CAP	Pathogenic	0.77	D
MetaRNN	Pathogenic	0.92	D
MetaSVM	Pathogenic	0.97	D
MutationAssessor	Uncertain	2.1	M
PhyloP100		8.8
PrimateAI	Uncertain	0.68	T
PROVEAN	Pathogenic	-5.3	D
REVEL	Pathogenic	0.95
Sift	Uncertain	0.0010	D
Sift4G	Uncertain	0.0030	D
Polyphen		0.99	D
Vest4		0.98
MutPred		0.58		Gain of relative solvent accessibility (P = 0.0023)
MVP		0.97
MPC		1.3
ClinPred		1.0	D
GERP RS		5.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.94
gMVP		0.99
Mutation Taster		=2/98	disease causing

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

Other links and lift over

dbSNP: rs1555438678; hg19: chr15-68504056;