4-127918165-T-C

Position:

• chr4-127918165-T-C

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_001371596.2(MFSD8):​c.*2465A>G variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0301 in 152,342 control chromosomes in the GnomAD database, including 297 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.030 (297 hom., cov: 32)
  • Failed GnomAD Quality Control
• Consequence: MFSD8 NM_001371596.2 3_prime_UTR
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: -2.52

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]

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.91).
• BP6: Variant 4-127918165-T-C is Benign according to our data. Variant chr4-127918165-T-C is described in ClinVar as [Benign]. Clinvar id is 347520.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.25 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MFSD8	NM_001371596.2	c.*2465A>G		3_prime_UTR_variant	12/12	ENST00000641686.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MFSD8	ENST00000641686.2	c.*2465A>G		3_prime_UTR_variant	12/12		NM_001371596.2	P1

Frequencies

GnomAD3 genomes AF: 0.0301 AC: 4586 AN: 152224 Hom.: 298 Cov.: 32

Gnomad AFR AF: 0.00362

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0862

Gnomad ASJ AF: 0.00691

Gnomad EAS AF: 0.262

Gnomad SAS AF: 0.0186

Gnomad FIN AF: 0.0605

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0138

Gnomad OTH AF: 0.0296

GnomAD4 exome Data not reliable, filtered out with message: AC0 AC: 0 AN: 0 Hom.: 0 Cov.: 0 AC XY: 0 AN XY: 0

GnomAD4 genome AF: 0.0301 AC: 4581 AN: 152342 Hom.: 297 Cov.: 32 AF XY: 0.0345 AC XY: 2572 AN XY: 74482

Gnomad4 AFR AF: 0.00361

Gnomad4 AMR AF: 0.0862

Gnomad4 ASJ AF: 0.00691

Gnomad4 EAS AF: 0.262

Gnomad4 SAS AF: 0.0184

Gnomad4 FIN AF: 0.0605

Gnomad4 NFE AF: 0.0138

Gnomad4 OTH AF: 0.0279

Alfa AF: 0.0181 Hom.: 11

Bravo AF: 0.0341

Asia WGS AF: 0.127 AC: 439 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:1

Benign, criteria provided, single submitter

not provided

Breakthrough Genomics, Breakthrough Genomics

-

- -

Neuronal ceroid lipofuscinosis 7 Benign:1

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 benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.91
CADD	Benign	0.15
DANN	Benign	0.49

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

Other links and lift over

dbSNP: rs72616968; hg19: chr4-128839320;