Genetic Variant VCAN:p.Ile16Leu (chr5-83483564-A-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_004385.5(VCAN):c.46A>T(p.Ile16Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000657 in 152,300 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. I16V) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Consequence

VCAN
NM_004385.5 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.360

Publications

1 publications found

Variant links:

Genes affected

VCAN (HGNC:2464): (versican) This gene is a member of the aggrecan/versican proteoglycan family. The protein encoded is a large chondroitin sulfate proteoglycan and is a major component of the extracellular matrix. This protein is involved in cell adhesion, proliferation, proliferation, migration and angiogenesis and plays a central role in tissue morphogenesis and maintenance. Mutations in this gene are the cause of Wagner syndrome type 1. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Aug 2009]

VCAN Gene-Disease associations (from GenCC):

Wagner disease
Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: G2P, Ambry Genetics, ClinGen, Orphanet, Labcorp Genetics (formerly Invitae)

VCAN links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.04427442).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004385.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
VCAN	NM_004385.5	MANE Select	c.46A>T	p.Ile16Leu	missense	Exon 2 of 15	NP_004376.2
VCAN	NM_001164097.2		c.46A>T	p.Ile16Leu	missense	Exon 2 of 14	NP_001157569.1	P13611-2
VCAN	NM_001164098.2		c.46A>T	p.Ile16Leu	missense	Exon 2 of 14	NP_001157570.1	P13611-3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
VCAN	ENST00000265077.8	TSL:1 MANE Select	c.46A>T	p.Ile16Leu	missense	Exon 2 of 15	ENSP00000265077.3	P13611-1
VCAN	ENST00000343200.9	TSL:1	c.46A>T	p.Ile16Leu	missense	Exon 2 of 14	ENSP00000340062.5	P13611-2
VCAN	ENST00000342785.8	TSL:1	c.46A>T	p.Ile16Leu	missense	Exon 2 of 14	ENSP00000342768.4	P13611-3

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152182

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:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

Cov.:

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152300

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74474

show subpopulations

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.0000241

AC:

AN:

41562

American (AMR)

AF:

0.00

AC:

AN:

15310

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5180

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68010

Other (OTH)

AF:

0.00

AC:

AN:

2114

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.225

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.085

BayesDel_addAF

Benign

-0.071

BayesDel_noAF

Benign

-0.34

CADD

Benign

(source)

DANN

Benign

0.70

DEOGEN2

Benign

0.11

Eigen

Benign

-1.1

Eigen_PC

Benign

-1.0

FATHMM_MKL

Benign

0.33

LIST_S2

Benign

0.68

M_CAP

Benign

0.044

MetaRNN

Benign

0.044

MetaSVM

Benign

-0.91

MutationAssessor

Benign

0.63

PhyloP100

0.36

PrimateAI

Benign

0.37

PROVEAN

Benign

-0.33

REVEL

Benign

0.034

Sift

Benign

0.40

Sift4G

Benign

0.42

Polyphen

0.0020

Vest4

0.31

MutPred

0.29

Loss of MoRF binding (P = 0.165)

MVP

0.34

MPC

0.080

ClinPred

0.13

GERP RS

-1.9

Varity_R

0.027

gMVP

0.30

Mutation Taster

=92/8

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over