15-88871510-G-C

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_001369268.1(ACAN):c.7189G>C(p.Val2397Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000274 in 1,461,218 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 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. V2397I) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.000027 ( 0 hom. )

Consequence

ACAN
NM_001369268.1 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.206

Publications

4 publications found

Variant links:

Genes affected

ACAN (HGNC:319): (aggrecan) This gene is a member of the aggrecan/versican proteoglycan family. The encoded protein is an integral part of the extracellular matrix in cartilagenous tissue and it withstands compression in cartilage. Mutations in this gene may be involved in skeletal dysplasia and spinal degeneration. Multiple alternatively spliced transcript variants that encode different protein isoforms have been observed in this gene. [provided by RefSeq, Jul 2008]

ACAN Gene-Disease associations (from GenCC):

osteochondritis dissecans
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Illumina, Orphanet
short stature and advanced bone age, with or without early-onset osteoarthritis and/or osteochondritis dissecans
Inheritance: AD Classification: DEFINITIVE Submitted by: Ambry Genetics
spondyloepiphyseal dysplasia, Kimberley type
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE, LIMITED Submitted by: G2P, Labcorp Genetics (formerly Invitae), Orphanet, Ambry Genetics
spondyloepimetaphyseal dysplasia, aggrecan type
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics, Orphanet
short stature-advanced bone age-early-onset osteoarthritis syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACAN links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

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

BP4

Computational evidence support a benign effect (MetaRNN=0.08063042).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ACAN	NM_001369268.1 link	c.7189G>C	p.Val2397Leu	missense_variant	Exon 15 of 19	ENST00000560601.4	NP_001356197.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ACAN	ENST00000560601.4 link	c.7189G>C	p.Val2397Leu	missense_variant	Exon 15 of 19	3	NM_001369268.1	ENSP00000453581.2		H0YMF1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000404

AC:

AN:

247260

AF XY:

0.00000744

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000274

AC:

AN:

1461218

Hom.:

Cov.:

AF XY:

0.0000289

AC XY:

AN XY:

726884

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33470

American (AMR)

AF:

0.00

AC:

AN:

44684

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26120

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.0000696

AC:

AN:

86190

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53248

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5720

European-Non Finnish (NFE)

AF:

0.0000288

AC:

AN:

1111734

Other (OTH)

AF:

0.0000331

AC:

AN:

60352

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.466

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ExAC

AF:

0.00000825

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Nov 18, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces valine, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 2359 of the ACAN protein (p.Val2359Leu). This variant is present in population databases (rs150555123, gnomAD 0.003%). This variant has not been reported in the literature in individuals affected with ACAN-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Not Available"; PolyPhen-2: "Benign"; Align-GVGD: "Not Available". The leucine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. 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 v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.29

BayesDel_addAF

Benign

-0.41

BayesDel_noAF

Benign

-0.72

CADD

Benign

5.3

(source)

DANN

Benign

0.97

Eigen

Benign

-0.66

Eigen_PC

Benign

-0.46

FATHMM_MKL

Benign

0.29

LIST_S2

Benign

0.60

T;T;T;T;T;.

M_CAP

Benign

0.0045

MetaRNN

Benign

0.081

T;T;T;T;T;T

MetaSVM

Benign

-0.97

PhyloP100

0.21

PrimateAI

Benign

0.40

PROVEAN

Benign

-1.9

.;N;.;N;N;N

REVEL

Benign

0.040

Sift

Benign

0.90

.;T;.;T;T;T

Sift4G

Benign

0.77

.;T;T;T;T;T

Vest4

0.22, 0.24, 0.21, 0.25, 0.18

MutPred

0.37

.;Gain of glycosylation at P2361 (P = 0.1651);.;.;.;Gain of glycosylation at P2361 (P = 0.1651);

MVP

0.068

MPC

0.36

ClinPred

0.19

GERP RS

3.7

Varity_R

0.060

gMVP

0.68

Mutation Taster

=98/2

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over