rs200284184

Variant names:

• chr4-127933039-A-G
• rs200284184
• NM_001371596.2:c.809T>C

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001371596.2(MFSD8):​c.809T>C​(p.Val270Ala) variant causes a missense change. The variant allele was found at a frequency of 0.00000434 in 1,613,906 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000041 (0 hom.)
• Consequence: MFSD8 NM_001371596.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.37
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• neuronal ceroid lipofuscinosis

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• neuronal ceroid lipofuscinosis 7

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Orphanet, Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
• macular dystrophy with central cone involvement

  Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.13612941).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001371596.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MFSD8	NM_001371596.2	MANE Select	c.809T>C	p.Val270Ala	missense	Exon 8 of 12	NP_001358525.1	Q8NHS3-1
	MFSD8	NM_001371591.2		c.809T>C	p.Val270Ala	missense	Exon 8 of 12	NP_001358520.1
	MFSD8	NM_001371592.2		c.815T>C	p.Val272Ala	missense	Exon 8 of 12	NP_001358521.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MFSD8	ENST00000641686.2	MANE Select	c.809T>C	p.Val270Ala	missense	Exon 8 of 12	ENSP00000493218.2	Q8NHS3-1
	MFSD8	ENST00000296468.8	TSL:1	c.809T>C	p.Val270Ala	missense	Exon 9 of 13	ENSP00000296468.3	Q8NHS3-1
	MFSD8	ENST00000945724.1		c.797T>C	p.Val266Ala	missense	Exon 8 of 12	ENSP00000615783.1

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152208 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

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: 0.0000147

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.00000398 AC: 1 AN: 251384 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000880

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000411 AC: 6 AN: 1461580 Hom.: 0 Cov.: 30 AF XY: 0.00000275 AC XY: 2 AN XY: 727116

African (AFR) AF: 0.00 AC: 0 AN: 33464

American (AMR) AF: 0.00 AC: 0 AN: 44720

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26124

East Asian (EAS) AF: 0.00 AC: 0 AN: 39600

South Asian (SAS) AF: 0.00 AC: 0 AN: 86254

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53410

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5764

European-Non Finnish (NFE) AF: 0.00000540 AC: 6 AN: 1111874

Other (OTH) AF: 0.00 AC: 0 AN: 60370

GnomAD4 genome AF: 0.00000656 AC: 1 AN: 152326 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74496

African (AFR) AF: 0.00 AC: 0 AN: 41582

American (AMR) AF: 0.00 AC: 0 AN: 15304

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5188

South Asian (SAS) AF: 0.00 AC: 0 AN: 4824

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10618

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 68018

Other (OTH) AF: 0.00 AC: 0 AN: 2114

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Neuronal ceroid lipofuscinosis 7 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Benign	-0.091	T
BayesDel_noAF	Benign	-0.37
CADD	Benign	20
DANN	Uncertain	0.98
DEOGEN2	Benign	0.13	T
Eigen	Benign	-0.50
Eigen_PC	Benign	-0.42
FATHMM_MKL	Benign	0.74	D
LIST_S2	Benign	0.79	T
M_CAP	Benign	0.019	T
MetaRNN	Benign	0.14	T
MetaSVM	Benign	-0.83	T
MutationAssessor	Benign	1.7	L
PhyloP100		4.4
PrimateAI	Benign	0.48	T
PROVEAN	Benign	-1.3	N
REVEL	Benign	0.083
Sift	Benign	0.11	T
Sift4G	Uncertain	0.013	D
Polyphen		0.0020	B
Vest4		0.22
MutPred		0.65		Gain of helix (P = 0.0696)
MVP		0.39
MPC		0.12
ClinPred		0.38	T
GERP RS		3.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.055
gMVP		0.53
Mutation Taster		=73/27	polymorphism

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

Other links and lift over

dbSNP: rs200284184; hg19: chr4-128854194;