chr8-99817613-A-G

Variant names:

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_152564.5(VPS13B):c.8171A>G(p.Tyr2724Cys) variant causes a missense change. The variant allele was found at a frequency of 0.000861 in 1,614,088 control chromosomes in the GnomAD database, including 18 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.00049 ( 1 hom., cov: 31)

Exomes 𝑓: 0.00090 ( 17 hom. )

Consequence

VPS13B
NM_152564.5 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:11

Conservation

PhyloP100: 5.13

Variant links:

Genes affected

VPS13B (HGNC:2183): (vacuolar protein sorting 13 homolog B) This gene encodes a potential transmembrane protein that may function in vesicle-mediated transport and sorting of proteins within the cell. This protein may play a role in the development and the function of the eye, hematological system, and central nervous system. Mutations in this gene have been associated with Cohen syndrome. Multiple splice variants encoding distinct isoforms have been identified for this gene. [provided by RefSeq, Jul 2008]

VPS13B links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.008331656).

BP6

Variant 8-99817613-A-G is Benign according to our data. Variant chr8-99817613-A-G is described in ClinVar as [Likely_benign]. Clinvar id is 197529.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr8-99817613-A-G is described in Lovd as [Benign].

BS1

Variant frequency is greater than expected in population sas. gnomad4 allele frequency = 0.000486 (74/152296) while in subpopulation SAS AF= 0.0151 (73/4828). AF 95% confidence interval is 0.0123. There are 1 homozygotes in gnomad4. There are 57 alleles in male gnomad4 subpopulation. Median coverage is 31. This position pass quality control queck.

BS2

High Homozygotes in GnomAdExome4 at 17 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
VPS13B	NM_017890.5 link	c.8246A>G	p.Tyr2749Cys	missense_variant	Exon 45 of 62	ENST00000358544.7	NP_060360.3	Q7Z7G8-1
VPS13B	NM_152564.5 link	c.8171A>G	p.Tyr2724Cys	missense_variant	Exon 45 of 62	ENST00000357162.7	NP_689777.3	Q7Z7G8-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
VPS13B	ENST00000358544.7 link	c.8246A>G	p.Tyr2749Cys	missense_variant	Exon 45 of 62	1	NM_017890.5	ENSP00000351346.2		Q7Z7G8-1
VPS13B	ENST00000357162.7 link	c.8171A>G	p.Tyr2724Cys	missense_variant	Exon 45 of 62	1	NM_152564.5	ENSP00000349685.2		Q7Z7G8-2

Frequencies

GnomAD3 genomes

AF:

0.000493

AC:

AN:

152178

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.0153

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00178

AC:

446

AN:

250994

Hom.:

AF XY:

0.00234

AC XY:

317

AN XY:

135622

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0142

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000882

Gnomad OTH exome

AF:

0.00147

GnomAD4 exome

AF:

0.000900

AC:

1315

AN:

1461792

Hom.:

Cov.:

AF XY:

0.00131

AC XY:

951

AN XY:

727204

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.0144

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000630

Gnomad4 OTH exome

AF:

0.000960

GnomAD4 genome

AF:

0.000486

AC:

AN:

152296

Hom.:

Cov.:

AF XY:

0.000766

AC XY:

AN XY:

74460

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.0151

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000208

Hom.:

Bravo

AF:

0.0000945

ExAC

AF:

0.00203

AC:

246

Asia WGS

AF:

0.00346

AC:

AN:

3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:11

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:4

Nov 17, 2015

Genetic Services Laboratory, University of Chicago

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Apr 15, 2015

Eurofins Ntd Llc (ga)

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Mar 12, 2022

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: VPS13B c.8246A>G (p.Tyr2749Cys) results in a non-conservative amino acid change in the encoded protein sequence. Three of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 0.0018 in 250994 control chromosomes, predominantly at a frequency of 0.014 within the South Asian subpopulation in the gnomAD database, including 9 homozygotes. The observed variant frequency within South Asian control individuals in the gnomAD database is approximately 5.6 fold of the estimated maximal expected allele frequency for a pathogenic variant in VPS13B causing Cohen Syndrome phenotype (0.0025), strongly suggesting that the variant is a benign polymorphism found primarily in populations of South Asian origin. To our knowledge, no penetrant association of c.8246A>G in individuals affected with Cohen Syndrome and no experimental evidence demonstrating its impact on protein function have been reported. Five clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. All laboratories classified the variant as benign/likely benign. Based on the evidence outlined above, the variant was classified as benign. -

Cohen syndrome

Benign:3

Oct 29, 2019

Natera, Inc.

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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. -

Jan 30, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Benign:2

Jul 01, 2024

CeGaT Center for Human Genetics Tuebingen

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

VPS13B: BS1, BS2 -

Clinical Genetics, Academic Medical Center

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Inborn genetic diseases

Benign:1

Mar 21, 2018

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

VPS13B-related disorder

Benign:1

Aug 01, 2022

PreventionGenetics, part of Exact Sciences

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.074

BayesDel_addAF

Benign

-0.14

BayesDel_noAF

Uncertain

0.040

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Benign

0.37

.;T

Eigen

Uncertain

0.46

Eigen_PC

Uncertain

0.51

FATHMM_MKL

Uncertain

0.96

LIST_S2

Uncertain

0.88

D;D

MetaRNN

Benign

0.0083

T;T

MetaSVM

Benign

-0.60

MutationAssessor

Benign

1.8

.;L

PrimateAI

Uncertain

0.64

PROVEAN

Uncertain

-3.3

D;D

REVEL

Uncertain

0.38

Sift

Benign

0.12

T;T

Sift4G

Pathogenic

0.0010

D;D

Polyphen

0.99

D;D

Vest4

0.66

MutPred

0.45

.;Gain of sheet (P = 0.0827);

MVP

0.63

MPC

0.50

ClinPred

0.11

GERP RS

4.4

Varity_R

0.18

gMVP

0.47

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