rs35504014

Variant names:

Your query was ambiguous. Multiple possible variants found:

Variant summary

Our verdict is Benign. The variant received -19 ACMG points: 0P and 19B. BP4_ModerateBP6_Very_StrongBP7BS1BS2

The NM_001844.5(COL2A1):c.2334C>T(p.Ala778Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0048 in 1,613,962 control chromosomes in the GnomAD database, including 22 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0027 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0050 ( 22 hom. )

Consequence

COL2A1
NM_001844.5 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:17

Conservation

PhyloP100: -0.0770

Publications

0 publications found

Variant links:

Genes affected

COL2A1 (HGNC:2200): (collagen type II alpha 1 chain) This gene encodes the alpha-1 chain of type II collagen, a fibrillar collagen found in cartilage and the vitreous humor of the eye. Mutations in this gene are associated with achondrogenesis, chondrodysplasia, early onset familial osteoarthritis, SED congenita, Langer-Saldino achondrogenesis, Kniest dysplasia, Stickler syndrome type I, and spondyloepimetaphyseal dysplasia Strudwick type. In addition, defects in processing chondrocalcin, a calcium binding protein that is the C-propeptide of this collagen molecule, are also associated with chondrodysplasia. There are two transcripts identified for this gene. [provided by RefSeq, Jul 2008]

COL2A1 Gene-Disease associations (from GenCC):

achondrogenesis type II
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, ClinGen, G2P, Orphanet, Labcorp Genetics (formerly Invitae)
Kniest dysplasia
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Orphanet, ClinGen, Labcorp Genetics (formerly Invitae)
platyspondylic dysplasia, Torrance type
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
spondyloepimetaphyseal dysplasia, Strudwick type
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: G2P, Orphanet
spondyloepiphyseal dysplasia congenita
Inheritance: AD, AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: ClinGen, G2P, Orphanet, Labcorp Genetics (formerly Invitae)
spondyloepiphyseal dysplasia with metatarsal shortening
Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: ClinGen, Orphanet, Ambry Genetics, Labcorp Genetics (formerly Invitae)
spondylometaphyseal dysplasia
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
spondyloperipheral dysplasia
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
Stickler syndrome type 1
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: PanelApp Australia, ClinGen, Illumina, Orphanet, Genomics England PanelApp
Stickler syndrome, type I, nonsyndromic ocular
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
avascular necrosis of femoral head, primary, 1
Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
Legg-Calve-Perthes disease
Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae)
mild spondyloepiphyseal dysplasia due to COL2A1 mutation with early-onset osteoarthritis
Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet
otospondylomegaepiphyseal dysplasia, autosomal recessive
Inheritance: AD, AR Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae)
spondyloepiphyseal dysplasia, Stanescu type
Inheritance: AD Classification: MODERATE, SUPPORTIVE Submitted by: ClinGen, Orphanet
autosomal dominant rhegmatogenous retinal detachment
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
dysspondyloenchondromatosis
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
familial avascular necrosis of femoral head
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
hypochondrogenesis
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
multiple epiphyseal dysplasia, Beighton type
Inheritance: AD Classification: SUPPORTIVE, LIMITED Submitted by: Orphanet, Labcorp Genetics (formerly Invitae)
spondylometaphyseal dysplasia, Schmidt type
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
otospondylomegaepiphyseal dysplasia
Inheritance: AR Classification: LIMITED Submitted by: Ambry Genetics
vitreoretinopathy with phalangeal epiphyseal dysplasia
Inheritance: Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

COL2A1 links:

LOC105369752 (HGNC:):

LOC105369752 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -19 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.4).

BP6

Variant 12-47982128-G-A is Benign according to our data. Variant chr12-47982128-G-A is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 166926.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-0.077 with no splicing effect.

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.00266 (405/152196) while in subpopulation NFE AF = 0.00472 (321/67996). AF 95% confidence interval is 0.0043. There are 0 homozygotes in GnomAd4. There are 179 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

BS2

High Homozygotes in GnomAdExome4 at 22 Unknown,AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COL2A1	NM_001844.5 link	c.2334C>T	p.Ala778Ala	synonymous_variant	Exon 35 of 54	ENST00000380518.8	NP_001835.3	P02458-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
COL2A1	ENST00000380518.8 link	c.2334C>T	p.Ala778Ala	synonymous_variant	Exon 35 of 54	1	NM_001844.5	ENSP00000369889.3	P02458-2
COL2A1	ENST00000337299.7 link	c.2127C>T	p.Ala709Ala	synonymous_variant	Exon 34 of 53	1		ENSP00000338213.6	P02458-1
COL2A1	ENST00000483376.1 link	n.512C>T		non_coding_transcript_exon_variant	Exon 6 of 8	5
COL2A1	ENST00000493991.5 link	n.1258C>T		non_coding_transcript_exon_variant	Exon 18 of 37	2

Frequencies

GnomAD3 genomes

AF:

0.00266

AC:

405

AN:

152078

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000869

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000721

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00264

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00472

Gnomad OTH

AF:

0.00335

GnomAD2 exomes

AF:

0.00277

AC:

697

AN:

251476

AF XY:

0.00283

show subpopulations

Gnomad AFR exome

AF:

0.000984

Gnomad AMR exome

AF:

0.000983

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00319

Gnomad NFE exome

AF:

0.00483

Gnomad OTH exome

AF:

0.00326

GnomAD4 exome

AF:

0.00503

AC:

7347

AN:

1461766

Hom.:

Cov.:

AF XY:

0.00484

AC XY:

3517

AN XY:

727196

show subpopulations

African (AFR)

AF:

0.000896

AC:

AN:

33480

American (AMR)

AF:

0.00101

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.000290

AC:

AN:

86252

European-Finnish (FIN)

AF:

0.00330

AC:

176

AN:

53398

Middle Eastern (MID)

AF:

0.000173

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00618

AC:

6872

AN:

1111914

Other (OTH)

AF:

0.00328

AC:

198

AN:

60394

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.486

Heterozygous variant carriers

376

752

1127

1503

1879

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

272

544

816

1088

1360

<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:

0.00266

AC:

405

AN:

152196

Hom.:

Cov.:

AF XY:

0.00241

AC XY:

179

AN XY:

74424

show subpopulations

African (AFR)

AF:

0.000867

AC:

AN:

41538

American (AMR)

AF:

0.000720

AC:

AN:

15274

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5162

South Asian (SAS)

AF:

0.000414

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00264

AC:

AN:

10612

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00472

AC:

321

AN:

67996

Other (OTH)

AF:

0.00332

AC:

AN:

2110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.502

Heterozygous variant carriers

103

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome 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

Alfa

AF:

0.00402

Hom.:

Bravo

AF:

0.00264

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.00322

EpiControl

AF:

0.00474

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:17

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:8

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

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Jul 16, 2019

Athena Diagnostics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Clinical Genetics, Academic Medical Center

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Mar 01, 2025

CeGaT Center for Human Genetics Tuebingen

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

COL2A1: BP4, BP7, BS2 -

Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Oct 03, 2023

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not specified

Benign:3

Jul 21, 2015

Eurofins Ntd Llc (ga)

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Genome Diagnostics Laboratory, Amsterdam University Medical Center

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Nov 18, 2016

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. -

Connective tissue disorder

Benign:2

Jun 01, 2018

Center for Human Genetics, Inc, Center for Human Genetics, Inc

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jun 01, 2020

Genome Diagnostics Laboratory, The Hospital for Sick Children

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

COL2A1-related disorder

Benign:1

Nov 20, 2019

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Achondrogenesis type II;C0265279:Kniest dysplasia;C0432214:Namaqualand hip dysplasia;C0432221:Spondylometaphyseal dysplasia - Sutcliffe type;C0700635:Spondyloepimetaphyseal dysplasia, Strudwick type;C0796173:Spondyloperipheral dysplasia;C1442965:Legg-Calve-Perthes disease;C1835437:Platyspondylic dysplasia, Torrance type;C1836080:Stickler syndrome, type I, nonsyndromic ocular;C1836683:Spondyloepiphyseal dysplasia with metatarsal shortening;C1851536:Multiple epiphyseal dysplasia, Beighton type;C1852989:Vitreoretinopathy with phalangeal epiphyseal dysplasia;C2020284:Stickler syndrome type 1;C2745959:Spondyloepiphyseal dysplasia congenita;C4225273:Spondyloepiphyseal dysplasia, Stanescu type;C4551562:Avascular necrosis of femoral head, primary, 1

Benign:1

Sep 16, 2021

Fulgent Genetics, Fulgent Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Stickler syndrome type 1

Benign:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

Type II Collagenopathies

Benign:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.40

CADD

Benign

8.1

(source)

DANN

Benign

0.69

PhyloP100

-0.077

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Mutation Taster

=59/41

polymorphism

(source)

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

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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