rs768714949

Variant names:

• chr13-76992085-C-T
• rs768714949
• NM_006493.4:c.-14C>T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_006493.4(CLN5):​c.-14C>T variant causes a 5 prime UTR premature start codon gain change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000754 in 1,459,552 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000075 (0 hom.)
• Consequence: CLN5 NM_006493.4 5_prime_UTR_premature_start_codon_gain
• Clinical Significance: Uncertain significance criteria provided, single submitter U:2
• Conservation: PhyloP100: -0.130

Genes affected

CLN5 (HGNC:2076): (CLN5 intracellular trafficking 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]

ENSG00000283208 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.14290655).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CLN5	NM_006493.4	c.-14C>T		5_prime_UTR_premature_start_codon_gain_variant	Exon 1 of 4	ENST00000377453.9	NP_006484.2
CLN5	NM_006493.4	c.-14C>T		5_prime_UTR_variant	Exon 1 of 4	ENST00000377453.9	NP_006484.2
CLN5	NM_001366624.2	c.-14C>T		5_prime_UTR_premature_start_codon_gain_variant	Exon 1 of 5		NP_001353553.1
CLN5	NM_001366624.2	c.-14C>T		5_prime_UTR_variant	Exon 1 of 5		NP_001353553.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CLN5	ENST00000377453	c.-14C>T		5_prime_UTR_premature_start_codon_gain_variant	Exon 1 of 4	1	NM_006493.4	ENSP00000366673.5
ENSG00000283208	ENST00000638147	c.-14C>T		5_prime_UTR_premature_start_codon_gain_variant	Exon 1 of 5	5		ENSP00000490953.2
CLN5	ENST00000377453	c.-14C>T		5_prime_UTR_variant	Exon 1 of 4	1	NM_006493.4	ENSP00000366673.5
ENSG00000283208	ENST00000638147	c.-14C>T		5_prime_UTR_variant	Exon 1 of 5	5		ENSP00000490953.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.0000256 AC: 6 AN: 234662 Hom.: 0 AF XY: 0.00000773 AC XY: 1 AN XY: 129322

Gnomad AFR exome AF: 0.0000707

Gnomad AMR exome AF: 0.000117

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000329

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000754 AC: 11 AN: 1459552 Hom.: 0 Cov.: 35 AF XY: 0.00000275 AC XY: 2 AN XY: 726116

Gnomad4 AFR exome AF: 0.0000299

Gnomad4 AMR exome AF: 0.000202

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ExAC AF: 0.00000831 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, single submitter

Submissions by phenotype

Neuronal ceroid lipofuscinosis Uncertain:2

Nov 01, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces threonine, which is neutral and polar, with isoleucine, which is neutral and non-polar, at codon 45 of the CLN5 protein (p.Thr45Ile). This variant is present in population databases (rs768714949, gnomAD 0.009%). This variant has not been reported in the literature in individuals affected with CLN5-related conditions. ClinVar contains an entry for this variant (Variation ID: 205140). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Oct 07, 2020

Natera, Inc.

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Benign	-0.38	T
BayesDel_noAF	Benign	-0.58
CADD	Benign	7.9
DANN	Uncertain	0.99
DEOGEN2	Benign	0.069	T;T;.
Eigen	Benign	-0.84
Eigen_PC	Benign	-1.0
FATHMM_MKL	Benign	0.046	N
LIST_S2	Benign	0.43	T;.;.
M_CAP	Benign	0.011	T
MetaRNN	Benign	0.14	T;T;T
MetaSVM	Benign	-0.98	T
PrimateAI	Uncertain	0.76	T
MutPred		0.25		Gain of catalytic residue at S44 (P = 0.0025);.;.;
ClinPred		0.90	D
GERP RS		-0.29

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

Publications

LitVar

Other links and lift over

dbSNP: rs768714949; hg19: chr13-77566220; COSMIC: COSV101080264; COSMIC: COSV101080264;