chr12-47978294-C-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BA1

The NM_001844.5(COL2A1):c.3000G>A(p.Pro1000Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00429 in 1,613,818 control chromosomes in the GnomAD database, including 286 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.023 ( 151 hom., cov: 32)

Exomes 𝑓: 0.0024 ( 135 hom. )

Consequence

COL2A1
NM_001844.5 synonymous

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:10

Conservation

PhyloP100: -2.55

Publications

2 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:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.53).

BP6

Variant 12-47978294-C-T is Benign according to our data. Variant chr12-47978294-C-T is described in ClinVar as Benign. ClinVar VariationId is 258232.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-2.55 with no splicing effect.

BA1

GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0755 is higher than 0.05.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001844.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	COL2A1	NM_001844.5	MANE Select	c.3000G>A	p.Pro1000Pro	synonymous	Exon 43 of 54	NP_001835.3
	COL2A1	NM_033150.3		c.2793G>A	p.Pro931Pro	synonymous	Exon 42 of 53	NP_149162.2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
COL2A1	ENST00000380518.8	TSL:1 MANE Select	c.3000G>A	p.Pro1000Pro	synonymous	Exon 43 of 54	ENSP00000369889.3
COL2A1	ENST00000337299.7	TSL:1	c.2793G>A	p.Pro931Pro	synonymous	Exon 42 of 53	ENSP00000338213.6
COL2A1	ENST00000928357.1		c.3003G>A	p.Pro1001Pro	synonymous	Exon 43 of 54	ENSP00000598416.1

Frequencies

GnomAD3 genomes

AF:

0.0226

AC:

3445

AN:

152164

Hom.:

151

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0779

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0106

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000578

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.0158

Gnomad NFE

AF:

0.000235

Gnomad OTH

AF:

0.0153

GnomAD2 exomes

AF:

0.00612

AC:

1533

AN:

250576

AF XY:

0.00438

show subpopulations

Gnomad AFR exome

AF:

0.0811

Gnomad AMR exome

AF:

0.00472

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000362

Gnomad OTH exome

AF:

0.00262

GnomAD4 exome

AF:

0.00237

AC:

3469

AN:

1461536

Hom.:

135

Cov.:

AF XY:

0.00203

AC XY:

1474

AN XY:

727096

show subpopulations

African (AFR)

AF:

0.0799

AC:

2675

AN:

33472

American (AMR)

AF:

0.00530

AC:

237

AN:

44708

Ashkenazi Jewish (ASJ)

AF:

0.000115

AC:

AN:

26136

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39696

South Asian (SAS)

AF:

0.000162

AC:

AN:

86236

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53204

Middle Eastern (MID)

AF:

0.00347

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.000188

AC:

209

AN:

1111928

Other (OTH)

AF:

0.00513

AC:

310

AN:

60390

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.473

Heterozygous variant carriers

194

388

582

776

970

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

180

270

360

450

<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:

0.0226

AC:

3448

AN:

152282

Hom.:

151

Cov.:

AF XY:

0.0215

AC XY:

1601

AN XY:

74474

show subpopulations

African (AFR)

AF:

0.0777

AC:

3228

AN:

41544

American (AMR)

AF:

0.0106

AC:

162

AN:

15304

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.000579

AC:

AN:

5180

South Asian (SAS)

AF:

0.000414

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.0170

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000235

AC:

AN:

68014

Other (OTH)

AF:

0.0151

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.502

Heterozygous variant carriers

164

327

491

654

818

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

102

136

170

<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:

0.00951

Hom.:

Bravo

AF:

0.0256

Asia WGS

AF:

0.00549

AC:

AN:

3478

EpiCase

AF:

0.000218

EpiControl

AF:

0.000237

ClinVar

ClinVar submissions as Germline

Significance:Benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not specified (4)

not provided (3)

Connective tissue disorder (1)

Stickler syndrome type 1 (1)

Type II Collagenopathies (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.53

CADD

Benign

2.9

(source)

DANN

Benign

0.53

PhyloP100

-2.6

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.6

Mutation Taster

=92/8

polymorphism (auto)

(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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over