20-762576-T-C

Position:

• chr20-762576-T-C

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_033409.4(SLC52A3):​c.1074-752A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.357 in 152,072 control chromosomes in the GnomAD database, including 10,448 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.36 (10448 hom., cov: 33)
• Consequence: SLC52A3 NM_033409.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.178

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]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.89).
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.642 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SLC52A3	NM_033409.4	c.1074-752A>G		intron_variant		ENST00000645534.1	NP_212134.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SLC52A3	ENST00000645534.1	c.1074-752A>G		intron_variant			NM_033409.4	ENSP00000494193.1

Frequencies

GnomAD3 genomes AF: 0.357 AC: 54291 AN: 151954 Hom.: 10440 Cov.: 33

Gnomad AFR AF: 0.227

Gnomad AMI AF: 0.346

Gnomad AMR AF: 0.403

Gnomad ASJ AF: 0.377

Gnomad EAS AF: 0.660

Gnomad SAS AF: 0.435

Gnomad FIN AF: 0.443

Gnomad MID AF: 0.404

Gnomad NFE AF: 0.383

Gnomad OTH AF: 0.361

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.357 AC: 54321 AN: 152072 Hom.: 10448 Cov.: 33 AF XY: 0.364 AC XY: 27067 AN XY: 74342

Gnomad4 AFR AF: 0.227

Gnomad4 AMR AF: 0.404

Gnomad4 ASJ AF: 0.377

Gnomad4 EAS AF: 0.661

Gnomad4 SAS AF: 0.436

Gnomad4 FIN AF: 0.443

Gnomad4 NFE AF: 0.383

Gnomad4 OTH AF: 0.359

Alfa AF: 0.382 Hom.: 15547

Bravo AF: 0.353

Asia WGS AF: 0.511 AC: 1772 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
CADD	Benign	3.1
DANN	Benign	0.67

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: rs2317024; hg19: chr20-743220;