4-127939961-C-T

Position:

chr4-127939961-C-T

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP4_StrongBP6BS2

The NM_001371596.2(MFSD8):c.590G>A(p.Gly197Asp) variant causes a missense change. The variant allele was found at a frequency of 0.000344 in 1,613,454 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G197V) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0017 ( 0 hom., cov: 31)

Exomes 𝑓: 0.00021 ( 3 hom. )

Consequence

MFSD8
NM_001371596.2 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:6

Conservation

PhyloP100: 6.59

Variant links:

Genes affected

MFSD8 (HGNC:28486): (major facilitator superfamily domain containing 8) This gene encodes a ubiquitous integral membrane protein that contains a transporter domain and a major facilitator superfamily (MFS) domain. Other members of the major facilitator superfamily transport small solutes through chemiosmotic ion gradients. The substrate transported by this protein is unknown. The protein likely localizes to lysosomal membranes. Mutations in this gene are correlated with a variant form of late infantile-onset neuronal ceroid lipofuscinoses (vLINCL). [provided by RefSeq, Oct 2008]

MFSD8 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -9 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.014030397).

BP6

Variant 4-127939961-C-T is Benign according to our data. Variant chr4-127939961-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 198619.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=4, Uncertain_significance=1, Benign=1}. Variant chr4-127939961-C-T is described in Lovd as [Likely_benign].

BS2

High Homozygotes in GnomAdExome4 at 3 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MFSD8	NM_001371596.2 linkuse as main transcript	c.590G>A	p.Gly197Asp	missense_variant	6/12	ENST00000641686.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MFSD8	ENST00000641686.2 linkuse as main transcript	c.590G>A	p.Gly197Asp	missense_variant	6/12		NM_001371596.2	P1	Q8NHS3-1

Frequencies

GnomAD3 genomes

AF:

0.00166

AC:

252

AN:

152082

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00584

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000524

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:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000510

AC:

128

AN:

251174

Hom.:

AF XY:

0.000420

AC XY:

AN XY:

135790

show subpopulations

Gnomad AFR exome

AF:

0.00690

Gnomad AMR exome

AF:

0.000289

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:

0.0000440

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000207

AC:

303

AN:

1461254

Hom.:

Cov.:

AF XY:

0.000183

AC XY:

133

AN XY:

726930

show subpopulations

Gnomad4 AFR exome

AF:

0.00729

Gnomad4 AMR exome

AF:

0.000358

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:

0.0000216

Gnomad4 OTH exome

AF:

0.000298

GnomAD4 genome

AF:

0.00166

AC:

252

AN:

152200

Hom.:

Cov.:

AF XY:

0.00168

AC XY:

125

AN XY:

74414

show subpopulations

Gnomad4 AFR

AF:

0.00583

Gnomad4 AMR

AF:

0.000524

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000349

Hom.:

Bravo

AF:

0.00222

ESP6500AA

AF:

0.00635

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000758

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3472

EpiCase

AF:

0.00

EpiControl

AF:

0.000119

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:6

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1Benign:1

Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Jul 28, 2020	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Mayo Clinic Laboratories, Mayo Clinic	May 04, 2023	BS1, PP3 -

Neuronal ceroid lipofuscinosis 7

Benign:2

Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 30, 2024	- -
Likely benign, 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 and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

Late-infantile neuronal ceroid lipofuscinosis

Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

Natera, Inc.

Jan 24, 2020

- -

not specified

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Eurofins Ntd Llc (ga)

Nov 13, 2014

- -

Inborn genetic diseases

Benign:1

Benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 28, 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. -

MFSD8-related disorder

Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Aug 15, 2024

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

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.50

BayesDel_addAF

Uncertain

0.089

BayesDel_noAF

Pathogenic

0.36

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.52

D;D;.;.;.;.;.;.;.;.;.

Eigen

Pathogenic

0.73

Eigen_PC

Uncertain

0.63

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.89

.;.;D;D;D;D;D;D;D;D;D

M_CAP

Uncertain

0.12

MetaRNN

Benign

0.014

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

MetaSVM

Uncertain

0.66

MutationAssessor

Pathogenic

3.1

M;M;.;.;.;.;.;.;.;.;.

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Uncertain

0.71

PROVEAN

Pathogenic

-5.5

.;D;.;.;.;.;.;.;.;.;.

REVEL

Pathogenic

0.82

Sift

Uncertain

0.0040

.;D;.;.;.;.;.;.;.;.;.

Sift4G

Uncertain

0.029

.;D;.;.;.;.;.;.;.;.;.

Polyphen

1.0

D;D;.;.;.;.;.;.;.;.;.

Vest4

0.91

MVP

0.90

MPC

0.56

ClinPred

0.088

GERP RS

4.5

Varity_R

0.73

gMVP

0.73

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