rs142392473

Positions:

chr4-76174219-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4BS1_Supporting

The ENST00000264896.8(SCARB2):c.919G>A(p.Asp307Asn) variant causes a missense change. The variant allele was found at a frequency of 0.00033 in 1,614,092 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D307A) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00016 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00035 ( 1 hom. )

Consequence

SCARB2
ENST00000264896.8 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:4

Conservation

PhyloP100: 5.57

Variant links:

Genes affected

SCARB2 (HGNC:1665): (scavenger receptor class B member 2) The protein encoded by this gene is a type III glycoprotein that is located primarily in limiting membranes of lysosomes and endosomes. Earlier studies in mice and rat suggested that this protein may participate in membrane transportation and the reorganization of endosomal/lysosomal compartment. The protein deficiency in mice was reported to impair cell membrane transport processes and cause pelvic junction obstruction, deafness, and peripheral neuropathy. Further studies in human showed that this protein is a ubiquitously expressed protein and that it is involved in the pathogenesis of HFMD (hand, foot, and mouth disease) caused by enterovirus-71 and possibly by coxsackievirus A16. Mutations in this gene caused an autosomal recessive progressive myoclonic epilepsy-4 (EPM4), also known as action myoclonus-renal failure syndrome (AMRF). Alternatively spliced transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Feb 2011]

SCARB2 links:

(HGNC:):

links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.2671019).

BS1

Variant frequency is greater than expected in population nfe. gnomad4_exome allele frequency = 0.000347 (508/1461888) while in subpopulation NFE AF= 0.000447 (497/1112010). AF 95% confidence interval is 0.000414. There are 1 homozygotes in gnomad4_exome. There are 257 alleles in male gnomad4_exome subpopulation. Median coverage is 31. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
SCARB2	NM_005506.4 linkuse as main transcript	c.919G>A	p.Asp307Asn	missense_variant	7/12	ENST00000264896.8	NP_005497.1
SCARB2	NM_001204255.2 linkuse as main transcript	c.490G>A	p.Asp164Asn	missense_variant	4/9		NP_001191184.1
SCARB2	XM_047416429.1 linkuse as main transcript	c.445G>A	p.Asp149Asn	missense_variant	7/12		XP_047272385.1
SCARB2	XM_047416430.1 linkuse as main transcript	c.445G>A	p.Asp149Asn	missense_variant	7/12		XP_047272386.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SCARB2	ENST00000264896.8 linkuse as main transcript	c.919G>A	p.Asp307Asn	missense_variant	7/12	1	NM_005506.4	ENSP00000264896	P4	Q14108-1
	ENST00000651366.1 linkuse as main transcript	n.102+24953C>T		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes

AF:

0.000158

AC:

AN:

152204

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000121

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:

0.000279

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000187

AC:

AN:

251314

Hom.:

AF XY:

0.000199

AC XY:

AN XY:

135810

show subpopulations

Gnomad AFR exome

AF:

0.000123

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:

0.00

Gnomad NFE exome

AF:

0.000387

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000347

AC:

508

AN:

1461888

Hom.:

Cov.:

AF XY:

0.000353

AC XY:

257

AN XY:

727244

show subpopulations

Gnomad4 AFR exome

AF:

0.0000896

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:

0.0000374

Gnomad4 NFE exome

AF:

0.000447

Gnomad4 OTH exome

AF:

0.0000993

GnomAD4 genome

AF:

0.000158

AC:

AN:

152204

Hom.:

Cov.:

AF XY:

0.000108

AC XY:

AN XY:

74356

show subpopulations

Gnomad4 AFR

AF:

0.000121

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:

0.000279

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000166

Hom.:

Bravo

AF:

0.000185

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000349

AC:

ExAC

AF:

0.000181

AC:

EpiCase

AF:

0.000164

EpiControl

AF:

0.000237

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Aug 02, 2021

The c.919G>A (p.D307N) alteration is located in exon 7 (coding exon 7) of the SCARB2 gene. This alteration results from a G to A substitution at nucleotide position 919, causing the aspartic acid (D) at amino acid position 307 to be replaced by an asparagine (N). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Action myoclonus-renal failure syndrome

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Apr 05, 2022

- -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Sep 26, 2024

In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Progressive myoclonic epilepsy

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Sep 13, 2022

This sequence change replaces aspartic acid, which is acidic and polar, with asparagine, which is neutral and polar, at codon 307 of the SCARB2 protein (p.Asp307Asn). This variant is present in population databases (rs142392473, gnomAD 0.04%). This variant has not been reported in the literature in individuals affected with SCARB2-related conditions. ClinVar contains an entry for this variant (Variation ID: 418468). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt SCARB2 protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.097

BayesDel_addAF

Benign

-0.38

BayesDel_noAF

Benign

-0.47

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.49

T;.;.;.;.;.;.

Eigen

Benign

-0.064

Eigen_PC

Benign

0.021

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.94

D;D;D;D;D;D;D

M_CAP

Benign

0.026

MetaRNN

Benign

0.27

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

MetaSVM

Benign

-0.52

MutationAssessor

Benign

1.9

L;.;.;.;.;.;.

MutationTaster

Benign

1.0

D;D

PrimateAI

Benign

0.43

PROVEAN

Uncertain

-2.8

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

REVEL

Benign

0.18

Sift

Benign

0.046

D;.;.;.;.;T;.

Sift4G

Uncertain

0.014

D;.;.;.;.;T;.

Polyphen

0.078

B;.;.;.;.;.;.

Vest4

0.33

MVP

0.68

MPC

0.66

ClinPred

0.18

GERP RS

5.5

Varity_R

0.38

gMVP

0.38

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