15-88838664-C-A

Position:

chr15-88838664-C-A

Variant summary

Our verdict is Benign. Variant got -13 ACMG points: 0P and 13B. BP4_StrongBP6BS1BS2

The NM_001369268.1(ACAN):c.72C>A(p.Asp24Glu) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000551 in 1,578,298 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/23 in silico tools predict a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000058 ( 0 hom. )

Consequence

ACAN
NM_001369268.1 missense, splice_region

Scores

Splicing: ADA: 0.001862

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:2

Conservation

PhyloP100: -0.00500

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -13 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.010815382).

BP6

Variant 15-88838664-C-A is Benign according to our data. Variant chr15-88838664-C-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 1528261.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Uncertain_significance=1}.

BS1

Variant frequency is greater than expected in population amr. gnomad4_exome allele frequency = 0.0000582 (83/1426006) while in subpopulation AMR AF= 0.00188 (81/43104). AF 95% confidence interval is 0.00155. There are 0 homozygotes in gnomad4_exome. There are 33 alleles in male gnomad4_exome subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High AC in GnomAdExome4 at 83 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ACAN	NM_001369268.1 linkuse as main transcript	c.72C>A	p.Asp24Glu	missense_variant, splice_region_variant	3/19	ENST00000560601.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ACAN	ENST00000560601.4 linkuse as main transcript	c.72C>A	p.Asp24Glu	missense_variant, splice_region_variant	3/19	3	NM_001369268.1	P1

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152174

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

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

GnomAD3 exomes

AF:

0.000347

AC:

AN:

219312

Hom.:

AF XY:

0.000275

AC XY:

AN XY:

116520

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00230

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:

0.00

GnomAD4 exome

AF:

0.0000582

AC:

AN:

1426006

Hom.:

Cov.:

AF XY:

0.0000469

AC XY:

AN XY:

704236

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00188

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

9.15e-7

Gnomad4 OTH exome

AF:

0.0000169

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152292

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74474

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000261

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:

0.00

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.000147

ExAC

AF:

0.000273

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 18, 2022

The c.72C>A (p.D24E) alteration is located in exon 3 (coding exon 2) of the ACAN gene. This alteration results from a C to A substitution at nucleotide position 72, causing the aspartic acid (D) at amino acid position 24 to be replaced by a glutamic acid (E). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

ACAN-related disorder

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Aug 10, 2022

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). -

not provided

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Sep 18, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.17

BayesDel_addAF

Benign

-0.69

BayesDel_noAF

Benign

-0.78

CADD

Benign

DANN

Uncertain

0.98

Eigen

Benign

-0.43

Eigen_PC

Benign

-0.31

FATHMM_MKL

Uncertain

0.84

LIST_S2

Benign

0.63

T;T;T;T;T;T;.

M_CAP

Benign

0.0095

MetaRNN

Benign

0.011

T;T;T;T;T;T;T

MetaSVM

Benign

-0.88

MutationTaster

Benign

0.99

D;D;D;D;D

PrimateAI

Benign

0.40

Polyphen

0.0010

.;.;.;B;.;.;.

Vest4

0.098, 0.073, 0.046, 0.085, 0.081, 0.094

MutPred

0.20

Loss of helix (P = 0.1299);Loss of helix (P = 0.1299);Loss of helix (P = 0.1299);Loss of helix (P = 0.1299);Loss of helix (P = 0.1299);Loss of helix (P = 0.1299);Loss of helix (P = 0.1299);

MVP

0.043

MPC

0.18

ClinPred

0.033

GERP RS

1.9

Varity_R

0.13

gMVP

0.24

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.0019

dbscSNV1_RF

Benign

0.076

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