Variant chr6-18121093-G-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2BP4_StrongBS1_Supporting

The NM_198586.3(NHLRC1):c.*326C>T variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00142 in 331,956 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: 𝑓 0.0015 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0014 ( 0 hom. )

Consequence

NHLRC1
NM_198586.3 3_prime_UTR

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -1.48

Variant links:

Genes affected

NHLRC1 (HGNC:21576): (NHL repeat containing E3 ubiquitin protein ligase 1) The protein encoded by this gene is a single subunit E3 ubiquitin ligase. Laforin is polyubiquitinated by the encoded protein. Defects in this intronless gene lead to an accumulation of laforin and onset of Lafora disease, also known as progressive myoclonic epilepsy type 2 (EPM2).[provided by RefSeq, Mar 2010]

NHLRC1 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-1.01).

BS1

Variant frequency is greater than expected in population amr. gnomad4 allele frequency = 0.00148 (225/152204) while in subpopulation AMR AF= 0.00373 (57/15278). AF 95% confidence interval is 0.00296. There are 0 homozygotes in gnomad4. There are 98 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
NHLRC1	NM_198586.3 linkuse as main transcript	c.*326C>T		3_prime_UTR_variant	1/1	ENST00000340650.6	NP_940988.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
NHLRC1	ENST00000340650.6 linkuse as main transcript	c.*326C>T		3_prime_UTR_variant	1/1		NM_198586.3	ENSP00000345464	P1

Frequencies

GnomAD3 genomes

AF:

0.00147

AC:

224

AN:

152086

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000459

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00374

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.000283

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00198

Gnomad OTH

AF:

0.00382

GnomAD4 exome

AF:

0.00138

AC:

248

AN:

179752

Hom.:

Cov.:

AF XY:

0.00116

AC XY:

111

AN XY:

96042

show subpopulations

Gnomad4 AFR exome

AF:

0.000868

Gnomad4 AMR exome

AF:

0.00234

Gnomad4 ASJ exome

AF:

0.000198

Gnomad4 EAS exome

AF:

0.000356

Gnomad4 SAS exome

AF:

0.0000702

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00188

Gnomad4 OTH exome

AF:

0.00200

GnomAD4 genome

AF:

0.00148

AC:

225

AN:

152204

Hom.:

Cov.:

AF XY:

0.00132

AC XY:

AN XY:

74402

show subpopulations

Gnomad4 AFR

AF:

0.000458

Gnomad4 AMR

AF:

0.00373

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.000208

Gnomad4 FIN

AF:

0.000283

Gnomad4 NFE

AF:

0.00198

Gnomad4 OTH

AF:

0.00425

Alfa

AF:

0.00127

Hom.:

Bravo

AF:

0.00137

Asia WGS

AF:

0.00346

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Lafora disease

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-1.0

CADD

Benign

0.63

DANN

Benign

0.37

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over