NM_006493.4:c.188G>T

Variant names:

• chr13-76995077-G-T
• rs104894386
• NM_006493.4:c.188G>T

Variant summary

Our verdict is Uncertain significance. The variant received 5 ACMG points: 5P and 0B. PM2 PM5 PP3

The NM_006493.4(CLN5):​c.188G>T​(p.Arg63Leu) 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 (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R63C) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CLN5 NM_006493.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 9.98
• Publications: 16 publications found

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:):

FBXL3 (HGNC:13599): (F-box and leucine rich repeat protein 3) This gene encodes a member of the F-box protein family which is characterized by an approximately 40 amino acid motif, the F-box. The F-box proteins constitute one of the four subunits of ubiquitin protein ligase complex called SCFs (SKP1-cullin-F-box), which function in phosphorylation-dependent ubiquitination. The F-box proteins are divided into 3 classes: Fbws containing WD-40 domains, Fbls containing leucine-rich repeats, and Fbxs containing either different protein-protein interaction modules or no recognizable motifs. The protein encoded by this gene belongs to the Fbls class and, in addition to an F-box, contains several tandem leucine-rich repeats and is localized in the nucleus. [provided by RefSeq, Jul 2008]

FBXL3 Gene-Disease associations (from GenCC):

• intellectual disability, short stature, facial anomalies, and joint dislocations

  Inheritance: AR Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr13-76995076-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 190222.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.836

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006493.4. 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
	CLN5	NM_006493.4	MANE Select	c.188G>T	p.Arg63Leu	missense	Exon 2 of 4	NP_006484.2
	CLN5	NM_001366624.2		c.188G>T	p.Arg63Leu	missense	Exon 2 of 5	NP_001353553.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CLN5	ENST00000377453.9	TSL:1 MANE Select	c.188G>T	p.Arg63Leu	missense	Exon 2 of 4	ENSP00000366673.5
	CLN5	ENST00000636183.2	TSL:1	c.188G>T	p.Arg63Leu	missense	Exon 2 of 4	ENSP00000490181.2
	ENSG00000283208	ENST00000638147.2	TSL:5	c.188G>T	p.Arg63Leu	missense	Exon 2 of 5	ENSP00000490953.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	1	-	Neuronal ceroid lipofuscinosis (1)
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.92
BayesDel_addAF	Pathogenic	0.43	D
BayesDel_noAF	Pathogenic	0.38
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.50	D
Eigen	Pathogenic	0.89
Eigen_PC	Pathogenic	0.85
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.93	D
M_CAP	Pathogenic	0.38	D
MetaRNN	Pathogenic	0.84	D
MetaSVM	Pathogenic	0.84	D
MutationAssessor	Uncertain	2.4	M
PhyloP100		10
PrimateAI	Uncertain	0.70	T
PROVEAN	Benign	-1.3	N
REVEL	Pathogenic	0.85
Sift	Benign	0.11	T
Polyphen		1.0	D
MutPred		0.70		Loss of disorder (P = 0.0259)
MVP		0.99
MPC		0.81
ClinPred		1.0	D
GERP RS		5.8
Varity_R		0.67
Mutation Taster		=12/88	disease causing

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: rs104894386; hg19: chr13-77569212;