chr20-62836349-G-A

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBA1

The NM_001853.4(COL9A3):c.1548+16G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.022 in 1,613,744 control chromosomes in the GnomAD database, including 960 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.035 ( 159 hom., cov: 34)

Exomes 𝑓: 0.021 ( 801 hom. )

Consequence

COL9A3
NM_001853.4 intron

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:4

Conservation

PhyloP100: -4.53

Publications

5 publications found

Variant links:

Genes affected

COL9A3 (HGNC:2219): (collagen type IX alpha 3 chain) This gene encodes one of the three alpha chains of type IX collagen, the major collagen component of hyaline cartilage. Type IX collagen, a heterotrimeric molecule, is usually found in tissues containing type II collagen, a fibrillar collagen. Mutations in this gene are associated with multiple epiphyseal dysplasia type 3. [provided by RefSeq, Jan 2010]

COL9A3 Gene-Disease associations (from GenCC):

epiphyseal dysplasia, multiple, 3
Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Ambry Genetics, Illumina, G2P, Labcorp Genetics (formerly Invitae)
Stickler syndrome
Inheritance: AR Classification: DEFINITIVE, STRONG, LIMITED Submitted by: Ambry Genetics, Genomics England PanelApp, ClinGen
Stickler syndrome, type 6
Inheritance: AR Classification: DEFINITIVE, STRONG, LIMITED Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae)
multiple epiphyseal dysplasia due to collagen 9 anomaly
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
autosomal recessive Stickler syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

COL9A3 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.8).

BP6

Variant 20-62836349-G-A is Benign according to our data. Variant chr20-62836349-G-A is described in ClinVar as Benign. ClinVar VariationId is 258412.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BA1

GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.118 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COL9A3	NM_001853.4 link	c.1548+16G>A		intron_variant	Intron 28 of 31	ENST00000649368.1	NP_001844.3	Q14050

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
COL9A3	ENST00000649368.1 link	c.1548+16G>A		intron_variant	Intron 28 of 31		NM_001853.4	ENSP00000496793.1		Q14050

Frequencies

GnomAD3 genomes

AF:

0.0348

AC:

5291

AN:

152248

Hom.:

157

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0678

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0314

Gnomad ASJ

AF:

0.0202

Gnomad EAS

AF:

0.126

Gnomad SAS

AF:

0.00952

Gnomad FIN

AF:

0.0134

Gnomad MID

AF:

0.0190

Gnomad NFE

AF:

0.0149

Gnomad OTH

AF:

0.0310

GnomAD2 exomes

AF:

0.0293

AC:

7299

AN:

249424

AF XY:

0.0264

show subpopulations

Gnomad AFR exome

AF:

0.0695

Gnomad AMR exome

AF:

0.0379

Gnomad ASJ exome

AF:

0.0204

Gnomad EAS exome

AF:

0.133

Gnomad FIN exome

AF:

0.0132

Gnomad NFE exome

AF:

0.0142

Gnomad OTH exome

AF:

0.0245

GnomAD4 exome

AF:

0.0206

AC:

30175

AN:

1461378

Hom.:

801

Cov.:

AF XY:

0.0202

AC XY:

14672

AN XY:

727030

show subpopulations

African (AFR)

AF:

0.0689

AC:

2305

AN:

33478

American (AMR)

AF:

0.0358

AC:

1599

AN:

44720

Ashkenazi Jewish (ASJ)

AF:

0.0183

AC:

477

AN:

26134

East Asian (EAS)

AF:

0.150

AC:

5962

AN:

39698

South Asian (SAS)

AF:

0.00834

AC:

719

AN:

86258

European-Finnish (FIN)

AF:

0.0134

AC:

711

AN:

52938

Middle Eastern (MID)

AF:

0.0156

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0150

AC:

16672

AN:

1111994

Other (OTH)

AF:

0.0272

AC:

1640

AN:

60390

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.486

Heterozygous variant carriers

1877

3755

5632

7510

9387

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

750

1500

2250

3000

3750

<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

AF:

0.0348

AC:

5307

AN:

152366

Hom.:

159

Cov.:

AF XY:

0.0345

AC XY:

2573

AN XY:

74514

show subpopulations

African (AFR)

AF:

0.0680

AC:

2828

AN:

41590

American (AMR)

AF:

0.0316

AC:

484

AN:

15306

Ashkenazi Jewish (ASJ)

AF:

0.0202

AC:

AN:

3472

East Asian (EAS)

AF:

0.126

AC:

655

AN:

5182

South Asian (SAS)

AF:

0.00973

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.0134

AC:

142

AN:

10628

Middle Eastern (MID)

AF:

0.0170

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0149

AC:

1011

AN:

68036

Other (OTH)

AF:

0.0307

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.502

Heterozygous variant carriers

260

521

781

1042

1302

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

112

168

224

280

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0234

Hom.:

Bravo

AF:

0.0379

Asia WGS

AF:

0.0630

AC:

218

AN:

3478

ClinVar

Significance: Benign

Submissions summary: Benign:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:2

Jan 04, 2018

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Benign:2

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Breakthrough Genomics, Breakthrough Genomics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.80

CADD

Benign

4.3

(source)

DANN

Benign

0.80

PhyloP100

-4.5

Mutation Taster

=100/0

polymorphism (auto)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

Details are displayed if max score is > 0.2

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over