20-763932-G-C

Position:

chr20-763932-G-C

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong

The NM_033409.4(SLC52A3):c.639C>G(p.Tyr213Ter) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000762 in 1,613,600 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.000046 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000079 ( 0 hom. )

Consequence

SLC52A3
NM_033409.4 stop_gained

Scores

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:6O:1

Conservation

PhyloP100: 3.44

Variant links:

Genes affected

SLC52A3 (HGNC:16187): (solute carrier family 52 member 3) This gene encodes a riboflavin transporter protein that is strongly expressed in the intestine and likely plays a role in intestinal absorption of riboflavin. The protein is predicted to have eleven transmembrane domains and a cell surface localization signal in the C-terminus. Mutations at this locus have been associated with Brown-Vialetto-Van Laere syndrome and Fazio-Londe disease. [provided by RefSeq, Mar 2012]

SLC52A3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 18 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 20-763932-G-C is Pathogenic according to our data. Variant chr20-763932-G-C is described in ClinVar as [Pathogenic]. Clinvar id is 210018.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr20-763932-G-C is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SLC52A3	NM_033409.4 linkuse as main transcript	c.639C>G	p.Tyr213Ter	stop_gained	3/5	ENST00000645534.1	NP_212134.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SLC52A3	ENST00000645534.1 linkuse as main transcript	c.639C>G	p.Tyr213Ter	stop_gained	3/5		NM_033409.4	ENSP00000494193	P1	Q9NQ40-1

Frequencies

GnomAD3 genomes

AF:

0.0000460

AC:

AN:

152144

Hom.:

Cov.:

show subpopulations

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:

0.000103

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000361

AC:

AN:

249606

Hom.:

AF XY:

0.0000296

AC XY:

AN XY:

135112

show subpopulations

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 SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000931

Gnomad NFE exome

AF:

0.0000622

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000794

AC:

116

AN:

1461456

Hom.:

Cov.:

AF XY:

0.0000853

AC XY:

AN XY:

726956

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000375

Gnomad4 NFE exome

AF:

0.0000998

Gnomad4 OTH exome

AF:

0.0000497

GnomAD4 genome

AF:

0.0000460

AC:

AN:

152144

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74304

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000103

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000340

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000259

AC:

ExAC

AF:

0.0000247

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.000119

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:6Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Brown-Vialetto-van Laere syndrome 1

Pathogenic:2Other:1

Pathogenic, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 29, 2024	This sequence change creates a premature translational stop signal (p.Tyr213*) in the SLC52A3 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in SLC52A3 are known to be pathogenic (PMID: 20206331, 22824638, 25462087). This variant is present in population databases (rs778363575, gnomAD 0.008%). This premature translational stop signal has been observed in individuals with Brown-Vialetto-Van Laere syndrome (PMID: 20206331, 21110228, 23688382). ClinVar contains an entry for this variant (Variation ID: 210018). For these reasons, this variant has been classified as Pathogenic. -
not provided, no classification provided	literature only	GeneReviews	-	- -
Pathogenic, no assertion criteria provided	literature only	OMIM	Feb 01, 2011	- -

not provided

Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Mar 01, 2024	SLC52A3: PVS1, PM2, PM3 -
Pathogenic, criteria provided, single submitter	clinical testing	GeneDx	May 10, 2024	Nonsense variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss of function is a known mechanism of disease; Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 23688382, 31980526, 34490615, 32773395, 34662687, 31959559, 26444347, 29961494, 25462087, 21110228, 20920669, 22824638, 26072523, 20206331) -

Inborn genetic diseases

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 29, 2020

The p.Y213* pathogenic mutation (also known as c.639C>G), located in coding exon 2 of the SLC52A3 gene, results from a C to G substitution at nucleotide position 639. This changes the amino acid from a tyrosine to a stop codon within coding exon 2. This alteration has been reported in the homozygous state and in the compound heterozygous state with other variants in SLC52A3 in multiple individuals with Brown-Vialetto-Van Laere syndrome (Bosch AM et al. J Inherit Metab Dis, 2011 Feb;34:159-64; Green P et al. Am J Hum Genet, 2010 Mar;86:485-9; Johnson JO et al. Am J Hum Genet, 2010 Oct;87:567-9; author reply 569-70; Malafronte P et al. Pediatr Dev Pathol May;16:364-71). In addition to the clinical data presented in the literature, this alteration is expected to result in loss of function by premature protein truncation or nonsense-mediated mRNA decay. As such, this alteration is interpreted as a disease-causing mutation. -

Progressive bulbar palsy of childhood

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Mendelics

May 04, 2022

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.53

BayesDel_noAF

Pathogenic

0.62

CADD

Pathogenic

DANN

Uncertain

0.99

Eigen

Uncertain

0.67

Eigen_PC

Uncertain

0.50

FATHMM_MKL

Pathogenic

0.98

MutationTaster

Benign

1.0

A;A

Vest4

0.83, 0.83

GERP RS

5.0

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