16-28482128-T-G

Position:

• chr16-28482128-T-G

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM1 PM2

The NM_001042432.2(CLN3):​c.1033A>C​(p.Thr345Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000479 in 1,461,214 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. T345S) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0000048 (0 hom.)
• Consequence: CLN3 NM_001042432.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.14

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM1: In a topological_domain Lumenal (size 47) in uniprot entity CLN3_HUMAN there are 12 pathogenic changes around while only 2 benign (86%) in NM_001042432.2
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CLN3	NM_001042432.2	c.1033A>C	p.Thr345Pro	missense_variant	14/16	ENST00000636147.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CLN3	ENST00000636147.2	c.1033A>C	p.Thr345Pro	missense_variant	14/16	1	NM_001042432.2	P1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD3 exomes AF: 0.00000805 AC: 2 AN: 248462 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 134442

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000178

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000479 AC: 7 AN: 1461214 Hom.: 0 Cov.: 33 AF XY: 0.00000413 AC XY: 3 AN XY: 726866

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000630

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 31

ExAC AF: 0.00000824 AC: 1

EpiCase AF: 0.000109

EpiControl AF: 0.00

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Uncertain	0.063	T
BayesDel_noAF	Benign	-0.13
CADD	Benign	23
DANN	Uncertain	1.0
Eigen	Uncertain	0.29
Eigen_PC	Uncertain	0.28
FATHMM_MKL	Benign	0.67	D
LIST_S2	Uncertain	0.89	D;D;.;.;.;.;D;D;D;.;D;D;D;.;D;D;D
M_CAP	Uncertain	0.087	D
MetaRNN	Uncertain	0.45	T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T
MetaSVM	Uncertain	0.38	D
MutationTaster	Benign	0.82	D;N;N;N;N;N;N;N;N;N;N;N;N
PrimateAI	Benign	0.45	T
Polyphen		0.98, 0.056, 0.99, 1.0	.;.;D;D;.;B;.;.;.;D;B;D;D;.;D;.;.
Vest4		0.68, 0.65, 0.67, 0.68, 0.67
MVP		0.79
MPC		0.65
ClinPred		0.90	D
GERP RS		5.2
Varity_R		0.88
gMVP		0.71

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.070		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: rs150986176; hg19: chr16-28493449;