chr5-83538579-C-T

Variant names:

• chr5-83538579-C-T
• rs34050047
• NM_004385.5:c.5576C>T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_004385.5(VCAN):​c.5576C>T​(p.Ala1859Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,786 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 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. A1859E) has been classified as Benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: VCAN NM_004385.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.64
• Publications: 5 publications found

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-AS1 (HGNC:40163): (VCAN antisense RNA 1)

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.0832147).

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

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	VCAN	NM_004385.5	MANE Select	c.5576C>T	p.Ala1859Val	missense	Exon 8 of 15	NP_004376.2
	VCAN	NM_001164097.2		c.2615C>T	p.Ala872Val	missense	Exon 7 of 14	NP_001157569.1
	VCAN	NM_001164098.2		c.4004-6958C>T		intron	N/A	NP_001157570.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	VCAN	ENST00000265077.8	TSL:1 MANE Select	c.5576C>T	p.Ala1859Val	missense	Exon 8 of 15	ENSP00000265077.3
	VCAN	ENST00000343200.9	TSL:1	c.2615C>T	p.Ala872Val	missense	Exon 7 of 14	ENSP00000340062.5
	VCAN	ENST00000513960.5	TSL:1	c.2615C>T	p.Ala872Val	missense	Exon 7 of 7	ENSP00000426251.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000399 AC: 1 AN: 250694 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000884

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461786 Hom.: 0 Cov.: 80 AF XY: 0.00000275 AC XY: 2 AN XY: 727210

African (AFR) AF: 0.00 AC: 0 AN: 33474

American (AMR) AF: 0.00 AC: 0 AN: 44716

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26132

East Asian (EAS) AF: 0.00 AC: 0 AN: 39698

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53418

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000180 AC: 2 AN: 1111938

Other (OTH) AF: 0.0000166 AC: 1 AN: 60384

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 27

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Jun 30, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces alanine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 1859 of the VCAN protein (p.Ala1859Val). This variant is present in population databases (no rsID available, gnomAD 0.0009%). This variant has not been reported in the literature in individuals affected with VCAN-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. 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 v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.16	T
BayesDel_noAF	Benign	-0.47
CADD	Benign	13
DANN	Uncertain	0.99
DEOGEN2	Benign	0.12	T
Eigen	Benign	-0.90
Eigen_PC	Benign	-0.81
FATHMM_MKL	Benign	0.61	D
LIST_S2	Benign	0.61	T
M_CAP	Benign	0.071	D
MetaRNN	Benign	0.083	T
MetaSVM	Benign	-0.78	T
MutationAssessor	Benign	0.0	N
PhyloP100		1.6
PrimateAI	Benign	0.28	T
PROVEAN	Benign	-0.69	N
REVEL	Benign	0.093
Sift	Uncertain	0.0010	D
Sift4G	Benign	0.24	T
Polyphen		0.0020	B
Vest4		0.074
MutPred		0.35		Loss of disorder (P = 0.1077)
MVP		0.25
MPC		0.078
ClinPred		0.17	T
GERP RS		0.77
Varity_R		0.088
gMVP		0.13
Mutation Taster		=100/0	polymorphism

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

Other links and lift over

dbSNP: rs34050047; hg19: chr5-82834398;