6-132744386-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 4P and 4B. PM1PM2BP4_Strong

The NM_004665.6(VNN2):c.1477T>C(p.Cys493Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000616 in 1,461,566 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000062 ( 0 hom. )

Consequence

VNN2
NM_004665.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.185

Variant links:

Genes affected

VNN2 (HGNC:12706): (vanin 2) This gene product is a member of the Vanin family of proteins that share extensive sequence similarity with each other, and also with biotinidase. The family includes secreted and membrane-associated proteins, a few of which have been reported to participate in hematopoietic cell trafficking. No biotinidase activity has been demonstrated for any of the vanin proteins, however, they possess pantetheinase activity, which may play a role in oxidative-stress response. The encoded protein is a GPI-anchored cell surface molecule that plays a role in transendothelial migration of neutrophils. This gene lies in close proximity to, and in same transcriptional orientation as two other vanin genes on chromosome 6q23-q24. Alternatively spliced transcript variants encoding different isoforms have been described for this gene. [provided by RefSeq, May 2011]

VNN2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM1

In a lipid_moiety_binding_region GPI-anchor amidated cysteine (size 0) in uniprot entity VNN2_HUMAN

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.028266042).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
VNN2	NM_004665.6 linkuse as main transcript	c.1477T>C	p.Cys493Arg	missense_variant	7/7	ENST00000326499.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
VNN2	ENST00000326499.11 linkuse as main transcript	c.1477T>C	p.Cys493Arg	missense_variant	7/7	1	NM_004665.6	P1	O95498-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000200

AC:

AN:

249996

Hom.:

AF XY:

0.0000222

AC XY:

AN XY:

135236

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000218

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.00000616

AC:

AN:

1461566

Hom.:

Cov.:

AF XY:

0.00000688

AC XY:

AN XY:

727060

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000151

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

8.99e-7

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

Cov.:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 31, 2023

The c.1477T>C (p.C493R) alteration is located in exon 7 (coding exon 7) of the VNN2 gene. This alteration results from a T to C substitution at nucleotide position 1477, causing the cysteine (C) at amino acid position 493 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.059

BayesDel_addAF

Benign

-0.30

BayesDel_noAF

Benign

-0.38

Cadd

Benign

1.3

Dann

Benign

0.30

DEOGEN2

Benign

0.012

T;.;.

Eigen

Benign

-1.9

Eigen_PC

Benign

-1.8

FATHMM_MKL

Benign

0.015

LIST_S2

Benign

0.29

T;T;T

M_CAP

Benign

0.064

MetaRNN

Benign

0.028

T;T;T

MetaSVM

Benign

-0.90

MutationAssessor

Benign

-0.55

N;.;.

MutationTaster

Benign

1.0

N;N;N

PrimateAI

Benign

0.24

PROVEAN

Benign

-0.57

N;N;N

REVEL

Benign

0.20

Sift

Benign

0.13

T;T;T

Sift4G

Benign

0.53

T;T;T

Polyphen

0.0

B;.;B

Vest4

0.049

MutPred

0.45

Gain of disorder (P = 0.0085);.;.;

MVP

0.11

MPC

0.027

ClinPred

0.017

GERP RS

-0.89

Varity_R

0.16

gMVP

0.34

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