NM_001369268.1:c.230G>A

Variant names:

Variant summary

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

The NM_001369268.1(ACAN):c.230G>A(p.Arg77His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00134 in 1,614,026 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.0013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0013 ( 1 hom. )

Consequence

ACAN
NM_001369268.1 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:6

Conservation

PhyloP100: 1.13

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=0.0048683584).

BP6

Variant 15-88838822-G-A is Benign according to our data. Variant chr15-88838822-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 446080.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Benign=1, Uncertain_significance=2}. Variant chr15-88838822-G-A is described in Lovd as [Likely_benign]. Variant chr15-88838822-G-A is described in Lovd as [Benign].

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.00135 (205/152320) while in subpopulation NFE AF= 0.00176 (120/68024). AF 95% confidence interval is 0.00151. There are 0 homozygotes in gnomad4. There are 118 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High AC in GnomAd4 at 205 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ACAN	NM_001369268.1 link	c.230G>A	p.Arg77His	missense_variant	Exon 3 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.230G>A	p.Arg77His	missense_variant	Exon 3 of 19	3	NM_001369268.1	ENSP00000453581.2		H0YMF1

Frequencies

GnomAD3 genomes

AF:

0.00135

AC:

205

AN:

152202

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000196

Gnomad ASJ

AF:

0.000576

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00631

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00176

Gnomad OTH

AF:

0.00143

GnomAD3 exomes

AF:

0.00154

AC:

385

AN:

249238

Hom.:

AF XY:

0.00162

AC XY:

219

AN XY:

135230

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000261

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000261

Gnomad FIN exome

AF:

0.00683

Gnomad NFE exome

AF:

0.00186

Gnomad OTH exome

AF:

0.00182

GnomAD4 exome

AF:

0.00134

AC:

1962

AN:

1461706

Hom.:

Cov.:

AF XY:

0.00131

AC XY:

954

AN XY:

727136

show subpopulations

Gnomad4 AFR exome

AF:

0.0000896

Gnomad4 AMR exome

AF:

0.000268

Gnomad4 ASJ exome

AF:

0.0000383

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000174

Gnomad4 FIN exome

AF:

0.00657

Gnomad4 NFE exome

AF:

0.00137

Gnomad4 OTH exome

AF:

0.000944

GnomAD4 genome

AF:

0.00135

AC:

205

AN:

152320

Hom.:

Cov.:

AF XY:

0.00158

AC XY:

118

AN XY:

74482

show subpopulations

Gnomad4 AFR

AF:

0.000241

Gnomad4 AMR

AF:

0.000196

Gnomad4 ASJ

AF:

0.000576

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00631

Gnomad4 NFE

AF:

0.00176

Gnomad4 OTH

AF:

0.00142

Alfa

AF:

0.00131

Hom.:

Bravo

AF:

0.000740

TwinsUK

AF:

0.00135

AC:

ALSPAC

AF:

0.00130

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.00130

AC:

ExAC

AF:

0.00183

AC:

222

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.00120

EpiControl

AF:

0.00142

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:6

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1Benign:3

Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Sep 15, 2017

Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Apr 05, 2021

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Jan 29, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Inborn genetic diseases

Uncertain:1

Apr 11, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.230G>A (p.R77H) alteration is located in exon 3 (coding exon 2) of the ACAN gene. This alteration results from a G to A substitution at nucleotide position 230, causing the arginine (R) at amino acid position 77 to be replaced by a histidine (H). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

ACAN-related disorder

Benign:1

Apr 02, 2019

PreventionGenetics, part of Exact Sciences

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

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 specified

Benign:1

Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Osteochondritis dissecans

Benign:1

May 28, 2019

Mendelics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.20

BayesDel_addAF

Benign

-0.46

BayesDel_noAF

Benign

-0.44

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.16

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

Eigen

Benign

-0.19

Eigen_PC

Benign

-0.074

FATHMM_MKL

Benign

0.45

LIST_S2

Benign

0.81

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

M_CAP

Benign

0.010

MetaRNN

Benign

0.0049

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

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.14

.;N;.;.;N;N;N

PrimateAI

Benign

0.33

PROVEAN

Uncertain

-2.6

.;D;.;D;D;D;D

REVEL

Benign

0.15

Sift

Benign

0.12

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

Sift4G

Benign

0.46

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

Polyphen

0.016

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

Vest4

0.23, 0.30, 0.10, 0.29, 0.23, 0.26

MVP

0.19

MPC

0.25

ClinPred

0.031

GERP RS

4.8

Varity_R

0.081

gMVP

0.57

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