8-99431570-T-C

Position:

chr8-99431570-T-C

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP4_StrongBP6BS2

The NM_017890.5(VPS13B):c.3116T>C(p.Met1039Thr) variant causes a missense change. The variant allele was found at a frequency of 0.000244 in 1,613,522 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.0013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00014 ( 3 hom. )

Consequence

VPS13B
NM_017890.5 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3B:4

Conservation

PhyloP100: 5.35

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 -9 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.00793159).

BP6

Variant 8-99431570-T-C is Benign according to our data. Variant chr8-99431570-T-C is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 528860.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=3, Uncertain_significance=3}.

BS2

High Homozygotes in GnomAdExome4 at 3 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
VPS13B	NM_017890.5 linkuse as main transcript	c.3116T>C	p.Met1039Thr	missense_variant	22/62	ENST00000358544.7	NP_060360.3
VPS13B	NM_152564.5 linkuse as main transcript	c.3116T>C	p.Met1039Thr	missense_variant	22/62	ENST00000357162.7	NP_689777.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
VPS13B	ENST00000358544.7 linkuse as main transcript	c.3116T>C	p.Met1039Thr	missense_variant	22/62	1	NM_017890.5	ENSP00000351346		Q7Z7G8-1
VPS13B	ENST00000357162.7 linkuse as main transcript	c.3116T>C	p.Met1039Thr	missense_variant	22/62	1	NM_152564.5	ENSP00000349685	P1	Q7Z7G8-2

Frequencies

GnomAD3 genomes

AF:

0.00128

AC:

195

AN:

152210

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00434

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000785

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:

0.00

Gnomad OTH

AF:

0.00143

GnomAD3 exomes

AF:

0.000271

AC:

AN:

250890

Hom.:

AF XY:

0.000192

AC XY:

AN XY:

135648

show subpopulations

Gnomad AFR exome

AF:

0.00382

Gnomad AMR exome

AF:

0.000145

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:

0.00

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000136

AC:

198

AN:

1461194

Hom.:

Cov.:

AF XY:

0.000113

AC XY:

AN XY:

726934

show subpopulations

Gnomad4 AFR exome

AF:

0.00544

Gnomad4 AMR exome

AF:

0.000134

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000180

Gnomad4 OTH exome

AF:

0.000116

GnomAD4 genome

AF:

0.00128

AC:

195

AN:

152328

Hom.:

Cov.:

AF XY:

0.00119

AC XY:

AN XY:

74480

show subpopulations

Gnomad4 AFR

AF:

0.00433

Gnomad4 AMR

AF:

0.000784

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00142

Alfa

AF:

0.000126

Hom.:

Bravo

AF:

0.00143

ESP6500AA

AF:

0.00341

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000338

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:3Benign:4

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1Benign:1

Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Sep 01, 2022	VPS13B: BP4 -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Oct 01, 2020	In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Cohen syndrome

Uncertain:1Benign:1

Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 29, 2024	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Center for Genomics, Ann and Robert H. Lurie Children's Hospital of Chicago	Mar 30, 2021	VPS13B NM_017890 exon 22 p.Met1039Thr (c.3116T>C): This variant has not been reported in the literature but is present in 0.4% (98/24028) African alleles, including 1 homozygote in the Genome Aggregation Database (http://gnomad.broadinstitute.org/rs140015545). Evolutionary conservation and computational predictive tools suggest that this variant may not impact the protein. In summary, data on this variant is insufficient for disease classification. Therefore, the clinical significance of this variant is uncertain. -

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genetic Services Laboratory, University of Chicago

Jul 27, 2021

DNA sequence analysis of the VPS13B gene demonstrated a sequence change, c.3116T>C, in exon 22 that results in an amino acid change, p.Met1039Thr. This sequence change does not appear to have been previously described in patients with VPS13B-related disorders and has been described in the gnomAD database with a low population frequency of 0.039% (dbSNP rs140015545). The p.Met1039Thr change affects a poorly conserved amino acid residue located in a domain of the VPS13B protein that is not known to be functional. In-silico pathogenicity prediction tools (SIFT, PolyPhen2, Align GVGD, REVEL) provide contradictory results for the p.Met1039Thr substitution. Due to these contrasting evidences and the lack of functional studies, the clinical significance of the p.Met1039Thr change remains unknown at this time. Homozygous and compound heterozygous mutations in VPS13B have been identified in patients with Cohen syndrome [MIM#216550], characterized by ID, postnatal microcephaly, facial dysmorphism, pigmentary retinopathy, myopia and intermittent neutropenia. -

Inborn genetic diseases

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

May 02, 2024

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

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Dec 08, 2023

This variant is classified as likely 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

0.16

BayesDel_addAF

Benign

-0.47

BayesDel_noAF

Benign

-0.45

CADD

Benign

DANN

Benign

0.75

DEOGEN2

Benign

0.091

.;T

Eigen

Benign

-0.33

Eigen_PC

Benign

-0.15

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Benign

0.76

T;T

M_CAP

Benign

0.021

MetaRNN

Benign

0.0079

T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.4

L;L

MutationTaster

Benign

0.60

N;N;N

PrimateAI

Benign

0.37

PROVEAN

Benign

-1.2

N;N

REVEL

Benign

0.050

Sift

Uncertain

0.011

D;D

Sift4G

Uncertain

0.035

D;D

Polyphen

0.066

B;B

Vest4

0.37

MVP

0.28

MPC

0.25

ClinPred

0.040

GERP RS

4.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.49

gMVP

0.50

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.060

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