8-1771344-G-A

Position:

chr8-1771344-G-A

Variant summary

Our verdict is Benign. Variant got -18 ACMG points: 2P and 20B. PM1BP4_StrongBP6_Very_StrongBS1BS2

The ENST00000331222.6(CLN8):c.290G>A(p.Arg97His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000476 in 1,614,204 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R97C) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0022 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00030 ( 3 hom. )

Consequence

CLN8
ENST00000331222.6 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:7

Conservation

PhyloP100: -0.223

Variant links:

Genes affected

CLN8 (HGNC:2079): (CLN8 transmembrane ER and ERGIC protein) This gene encodes a transmembrane protein belonging to a family of proteins containing TLC domains, which are postulated to function in lipid synthesis, transport, or sensing. The protein localizes to the endoplasmic reticulum (ER), and may recycle between the ER and ER-Golgi intermediate compartment. Mutations in this gene are associated with a disorder characterized by progressive epilepsy with cognitive disabilities (EPMR), which is a subtype of neuronal ceroid lipofuscinoses (NCL). Patients with mutations in this gene have altered levels of sphingolipid and phospholipids in the brain. [provided by RefSeq, Jul 2017]

CLN8 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -18 ACMG points.

PM1

In a domain TLC (size 200) in uniprot entity CLN8_HUMAN there are 39 pathogenic changes around while only 14 benign (74%) in ENST00000331222.6

BP4

Computational evidence support a benign effect (MetaRNN=0.0055971146).

BP6

Variant 8-1771344-G-A is Benign according to our data. Variant chr8-1771344-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 136807.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.0022 (335/152312) while in subpopulation AFR AF= 0.00748 (311/41566). AF 95% confidence interval is 0.0068. There are 0 homozygotes in gnomad4. There are 143 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAdExome4 at 3 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CLN8	NM_018941.4 linkuse as main transcript	c.290G>A	p.Arg97His	missense_variant	2/3	ENST00000331222.6	NP_061764.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CLN8	ENST00000331222.6 linkuse as main transcript	c.290G>A	p.Arg97His	missense_variant	2/3	1	NM_018941.4	ENSP00000328182	P1

Frequencies

GnomAD3 genomes

AF:

0.00221

AC:

336

AN:

152194

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00753

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000524

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000961

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.000103

Gnomad OTH

AF:

0.000958

GnomAD3 exomes

AF:

0.000748

AC:

188

AN:

251462

Hom.:

AF XY:

0.000478

AC XY:

AN XY:

135918

show subpopulations

Gnomad AFR exome

AF:

0.00892

Gnomad AMR exome

AF:

0.000491

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000707

Gnomad SAS exome

AF:

0.0000653

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000879

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000296

AC:

433

AN:

1461892

Hom.:

Cov.:

AF XY:

0.000246

AC XY:

179

AN XY:

727246

show subpopulations

Gnomad4 AFR exome

AF:

0.00866

Gnomad4 AMR exome

AF:

0.000447

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000504

Gnomad4 SAS exome

AF:

0.0000348

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000513

Gnomad4 OTH exome

AF:

0.000695

GnomAD4 genome

AF:

0.00220

AC:

335

AN:

152312

Hom.:

Cov.:

AF XY:

0.00192

AC XY:

143

AN XY:

74490

show subpopulations

Gnomad4 AFR

AF:

0.00748

Gnomad4 AMR

AF:

0.000523

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000963

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000103

Gnomad4 OTH

AF:

0.000948

Alfa

AF:

0.000533

Hom.:

Bravo

AF:

0.00245

ESP6500AA

AF:

0.00794

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.000914

AC:

111

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.000164

EpiControl

AF:

0.000237

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:2

Benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Mar 13, 2015	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Feb 05, 2014	This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

not provided

Benign:2

Benign, criteria provided, single submitter	clinical testing	Athena Diagnostics	Aug 08, 2018	- -
Likely benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -

Inborn genetic diseases

Benign:1

Benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Aug 08, 2016

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

CLN8-related disorder

Benign:1

Benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Dec 16, 2020

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Neuronal ceroid lipofuscinosis

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 30, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.074

BayesDel_addAF

Benign

-0.44

BayesDel_noAF

Benign

-0.40

CADD

Benign

1.1

DANN

Benign

0.82

DEOGEN2

Benign

0.32

.;T;T;T;T;.;T;.

Eigen

Benign

-1.5

Eigen_PC

Benign

-1.5

FATHMM_MKL

Benign

0.054

LIST_S2

Benign

0.56

T;.;.;.;.;T;.;T

MetaRNN

Benign

0.0056

T;T;T;T;T;T;T;T

MetaSVM

Benign

-0.90

MutationAssessor

Benign

0.81

.;L;L;L;L;.;L;.

MutationTaster

Benign

1.0

PrimateAI

Benign

0.35

PROVEAN

Benign

1.4

.;N;.;.;.;.;.;.

REVEL

Benign

0.11

Sift

Benign

0.49

.;T;.;.;.;.;.;.

Sift4G

Benign

0.52

.;T;.;.;.;.;.;T

Polyphen

0.016

.;B;B;B;B;.;B;.

Vest4

0.10

MVP

0.43

MPC

0.045

ClinPred

0.0027

GERP RS

-7.8

Varity_R

0.011

gMVP

0.35

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