rs200214191

Positions:

chr6-18121733-T-A

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 4P and 5B. PM1PM2BP4_StrongBS1_Supporting

The NM_198586.3(NHLRC1):c.874A>T(p.Thr292Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000539 in 1,614,080 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00030 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000028 ( 0 hom. )

Consequence

NHLRC1
NM_198586.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 2.42

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -1 ACMG points.

PM1

In a repeat NHL 4 (size 52) in uniprot entity NHLC1_HUMAN there are 4 pathogenic changes around while only 0 benign (100%) in NM_198586.3

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.020050436).

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.000302 (46/152316) while in subpopulation AFR AF= 0.000986 (41/41574). AF 95% confidence interval is 0.000747. There are 0 homozygotes in gnomad4. There are 21 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.874A>T	p.Thr292Ser	missense_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.874A>T	p.Thr292Ser	missense_variant	1/1		NM_198586.3	ENSP00000345464	P1

Frequencies

GnomAD3 genomes

AF:

0.000302

AC:

AN:

152198

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000989

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.0000638

AC:

AN:

250838

Hom.:

AF XY:

0.0000663

AC XY:

AN XY:

135796

show subpopulations

Gnomad AFR exome

AF:

0.000867

Gnomad AMR exome

AF:

0.0000578

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000280

AC:

AN:

1461764

Hom.:

Cov.:

AF XY:

0.0000248

AC XY:

AN XY:

727186

show subpopulations

Gnomad4 AFR exome

AF:

0.000986

Gnomad4 AMR exome

AF:

0.0000671

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:

8.99e-7

Gnomad4 OTH exome

AF:

0.0000662

GnomAD4 genome

AF:

0.000302

AC:

AN:

152316

Hom.:

Cov.:

AF XY:

0.000282

AC XY:

AN XY:

74490

show subpopulations

Gnomad4 AFR

AF:

0.000986

Gnomad4 AMR

AF:

0.000261

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.000569

Hom.:

Bravo

AF:

0.000389

ESP6500AA

AF:

0.000454

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000107

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Lafora disease

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 17, 2022

This sequence change replaces threonine, which is neutral and polar, with serine, which is neutral and polar, at codon 292 of the NHLRC1 protein (p.Thr292Ser). This variant is present in population databases (rs200214191, gnomAD 0.1%). This variant has not been reported in the literature in individuals affected with NHLRC1-related conditions. ClinVar contains an entry for this variant (Variation ID: 567398). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt NHLRC1 protein function. 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. -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Aug 29, 2018

The p.T292S variant (also known as c.874A>T), located in coding exon 1 of the NHLRC1 gene, results from an A to T substitution at nucleotide position 874. The threonine at codon 292 is replaced by serine, an amino acid with similar properties. This amino acid position is not well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

May 16, 2024

In silico analysis indicates that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.088

BayesDel_addAF

Benign

-0.33

BayesDel_noAF

Benign

-0.30

CADD

Benign

DANN

Benign

0.86

DEOGEN2

Benign

0.098

Eigen

Benign

-0.57

Eigen_PC

Benign

-0.55

FATHMM_MKL

Uncertain

0.91

LIST_S2

Benign

0.39

M_CAP

Benign

0.037

MetaRNN

Benign

0.020

MetaSVM

Benign

-0.89

MutationAssessor

Benign

1.8

MutationTaster

Benign

0.76

PrimateAI

Benign

0.35

PROVEAN

Benign

-0.78

REVEL

Benign

0.16

Sift

Benign

0.072

Sift4G

Uncertain

0.047

Polyphen

0.11

Vest4

0.13

MutPred

0.71

Gain of disorder (P = 0.0483);

MVP

0.84

MPC

0.38

ClinPred

0.024

GERP RS

1.4

Varity_R

0.046

gMVP

0.36

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

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