NM_001844.5:c.1681-38G>A

Variant names:

Variant summary

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

The NM_001844.5(COL2A1):c.1681-38G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0626 in 1,612,190 control chromosomes in the GnomAD database, including 3,727 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.050 ( 256 hom., cov: 32)

Exomes 𝑓: 0.064 ( 3471 hom. )

Consequence

COL2A1
NM_001844.5 intron

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:3

Conservation

PhyloP100: 0.616

Publications

1 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 -20 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.77).

BP6

Variant 12-47985625-C-T is Benign according to our data. Variant chr12-47985625-C-T is described in ClinVar as Benign. ClinVar VariationId is 258215.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BA1

GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.0715 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COL2A1	NM_001844.5 link	c.1681-38G>A		intron_variant	Intron 25 of 53	ENST00000380518.8	NP_001835.3	P02458-2

Ensembl

Gene	Transcript	HGVSc	Effect	Exon rank	TSL	MANE	Protein	UniProt
COL2A1	ENST00000380518.8 link	c.1681-38G>A	intron_variant	Intron 25 of 53	1	NM_001844.5	ENSP00000369889.3	P02458-2
COL2A1	ENST00000337299.7 link	c.1474-38G>A	intron_variant	Intron 24 of 52	1		ENSP00000338213.6	P02458-1
COL2A1	ENST00000493991.5 link	n.605-38G>A	intron_variant	Intron 8 of 36	2

Frequencies

GnomAD3 genomes

AF:

0.0505

AC:

7678

AN:

152090

Hom.:

256

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0275

Gnomad AMI

AF:

0.00987

Gnomad AMR

AF:

0.0290

Gnomad ASJ

AF:

0.0101

Gnomad EAS

AF:

0.000770

Gnomad SAS

AF:

0.0122

Gnomad FIN

AF:

0.0864

Gnomad MID

AF:

0.00633

Gnomad NFE

AF:

0.0732

Gnomad OTH

AF:

0.0446

GnomAD2 exomes

AF:

0.0475

AC:

11898

AN:

250578

AF XY:

0.0469

show subpopulations

Gnomad AFR exome

AF:

0.0253

Gnomad AMR exome

AF:

0.0181

Gnomad ASJ exome

AF:

0.0114

Gnomad EAS exome

AF:

0.000218

Gnomad FIN exome

AF:

0.0881

Gnomad NFE exome

AF:

0.0726

Gnomad OTH exome

AF:

0.0474

GnomAD4 exome

AF:

0.0639

AC:

93277

AN:

1459982

Hom.:

3471

Cov.:

AF XY:

0.0623

AC XY:

45255

AN XY:

726424

show subpopulations

African (AFR)

AF:

0.0246

AC:

823

AN:

33442

American (AMR)

AF:

0.0196

AC:

875

AN:

44720

Ashkenazi Jewish (ASJ)

AF:

0.0121

AC:

317

AN:

26110

East Asian (EAS)

AF:

0.000353

AC:

AN:

39692

South Asian (SAS)

AF:

0.0110

AC:

950

AN:

86232

European-Finnish (FIN)

AF:

0.0877

AC:

4654

AN:

53062

Middle Eastern (MID)

AF:

0.0101

AC:

AN:

5762

European-Non Finnish (NFE)

AF:

0.0741

AC:

82329

AN:

1110618

Other (OTH)

AF:

0.0540

AC:

3257

AN:

60344

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

4984

9969

14953

19938

24922

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

2942

5884

8826

11768

14710

<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:

0.0505

AC:

7681

AN:

152208

Hom.:

256

Cov.:

AF XY:

0.0499

AC XY:

3714

AN XY:

74420

show subpopulations

African (AFR)

AF:

0.0276

AC:

1145

AN:

41544

American (AMR)

AF:

0.0289

AC:

443

AN:

15304

Ashkenazi Jewish (ASJ)

AF:

0.0101

AC:

AN:

3472

East Asian (EAS)

AF:

0.000772

AC:

AN:

5184

South Asian (SAS)

AF:

0.0124

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.0864

AC:

916

AN:

10598

Middle Eastern (MID)

AF:

0.00680

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0732

AC:

4974

AN:

67968

Other (OTH)

AF:

0.0441

AC:

AN:

2108

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

366

732

1099

1465

1831

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

184

276

368

460

<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:

0.0599

Hom.:

Bravo

AF:

0.0436

Asia WGS

AF:

0.0100

AC:

AN:

3478

ClinVar

Significance: Benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Breakthrough Genomics, Breakthrough Genomics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Jun 26, 2018

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not specified

Benign:1

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.77

CADD

Benign

2.2

(source)

DANN

Benign

0.80

PhyloP100

0.62

Mutation Taster

=100/0

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

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over