15-68208244-C-A

Variant names:

• chr15-68208244-C-A
• rs143728911
• NM_017882.3:c.832G>T

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 4P and 1B. PM1 PM2 BP4

The NM_017882.3(CLN6):​c.832G>T​(p.Ala278Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,818 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign 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. A278T) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: CLN6 NM_017882.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.97
• Publications: 0 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: Uncertain_significance. The variant received 3 ACMG points.

• PM1: In a hotspot region, there are 4 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 6 uncertain in NM_017882.3
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.26778352).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CLN6	NM_017882.3	c.832G>T	p.Ala278Ser	missense_variant	Exon 7 of 7	ENST00000249806.11	NP_060352.1
CLN6	NM_001411068.1	c.928G>T	p.Ala310Ser	missense_variant	Exon 7 of 7		NP_001397997.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CLN6	ENST00000249806.11	c.832G>T	p.Ala278Ser	missense_variant	Exon 7 of 7	1	NM_017882.3	ENSP00000249806.5
ENSG00000260007	ENST00000562767.2	c.84-10616G>T		intron_variant	Intron 1 of 2	3		ENSP00000456336.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461818 Hom.: 0 Cov.: 38 AF XY: 0.00000138 AC XY: 1 AN XY: 727202

African (AFR) AF: 0.00 AC: 0 AN: 33478

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53362

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000180 AC: 2 AN: 1112000

Other (OTH) AF: 0.00 AC: 0 AN: 60392

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.091
BayesDel_addAF	Uncertain	0.12	D
BayesDel_noAF	Uncertain	-0.060
CADD	Benign	18
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.73	D;D;T;.;T;T
Eigen	Benign	-0.063
Eigen_PC	Benign	-0.054
FATHMM_MKL	Benign	0.51	D
LIST_S2	Uncertain	0.89	D;D;D;D;D;D
M_CAP	Uncertain	0.10	D
MetaRNN	Benign	0.27	T;T;T;T;T;T
MetaSVM	Uncertain	0.096	D
MutationAssessor	Benign	1.4	L;.;.;.;.;.
PhyloP100		2.0
PrimateAI	Benign	0.31	T
PROVEAN	Benign	-1.5	N;N;N;N;.;.
REVEL	Uncertain	0.38
Sift	Benign	0.28	T;T;T;T;.;.
Sift4G	Benign	0.18	T;T;T;T;.;.
Polyphen		0.95	P;.;.;.;.;.
Vest4		0.14
MutPred		0.36		.;.;.;Loss of catalytic residue at A310 (P = 0.1896);.;.;
MVP		0.84
MPC		0.31
ClinPred		0.84	D
GERP RS		3.3
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.099
gMVP		0.64

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: rs143728911; hg19: chr15-68500582;