rs532700241

Variant names:

Variant summary

Our verdict is Benign. The variant received -11 ACMG points: 0P and 11B. BP4_ModerateBP6BS1BS2

The NM_001844.5(COL2A1):c.*305G>A variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00569 in 602,094 control chromosomes in the GnomAD database, including 11 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.0049 ( 3 hom., cov: 32)

Exomes 𝑓: 0.0060 ( 8 hom. )

Consequence

COL2A1
NM_001844.5 3_prime_UTR

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:2

Conservation

PhyloP100: 1.64

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: Orphanet, ClinGen, G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics
COL2A1-related spondyloepiphyseal dysplasia
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
dysplasia of the proximal femoral epiphyses
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
Kniest dysplasia
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, ClinGen, Labcorp Genetics (formerly Invitae), Orphanet
platyspondylic dysplasia, Torrance type
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
spondyloepimetaphyseal dysplasia, Strudwick type
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, G2P
spondyloepiphyseal dysplasia congenita
Inheritance: AD, AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, G2P, Labcorp Genetics (formerly Invitae), ClinGen
spondyloepiphyseal dysplasia with metatarsal shortening
Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: Ambry Genetics, Orphanet, Labcorp Genetics (formerly Invitae), ClinGen
spondylometaphyseal dysplasia
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
spondyloperipheral dysplasia
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
Stickler syndrome type 1
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Genomics England PanelApp, ClinGen, Illumina
Stickler syndrome, type I, nonsyndromic ocular
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
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: Orphanet, Labcorp Genetics (formerly Invitae)
otospondylomegaepiphyseal dysplasia, autosomal recessive
Inheritance: AD, AR Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae)
spondyloepiphyseal dysplasia, Stanescu type
Inheritance: Unknown, 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: Labcorp Genetics (formerly Invitae), Orphanet
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 -11 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.23).

BP6

Variant 12-47973102-C-T is Benign according to our data. Variant chr12-47973102-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 308895.

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.00489 (745/152254) while in subpopulation NFE AF = 0.00745 (507/68020). AF 95% confidence interval is 0.00692. There are 3 homozygotes in GnomAd4. There are 351 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 3 Unknown,AD,AR gene

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.*305G>A		3_prime_UTR	Exon 54 of 54	NP_001835.3
	COL2A1	NM_033150.3		c.*305G>A		3_prime_UTR	Exon 53 of 53	NP_149162.2	P02458-1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
COL2A1	ENST00000380518.8	TSL:1 MANE Select	c.*305G>A	3_prime_UTR	Exon 54 of 54	ENSP00000369889.3	P02458-2
COL2A1	ENST00000928357.1		c.*305G>A	3_prime_UTR	Exon 54 of 54	ENSP00000598416.1
COL2A1	ENST00000493991.5	TSL:2	n.*99G>A	downstream_gene	N/A

Frequencies

GnomAD3 genomes

AF:

0.00490

AC:

745

AN:

152136

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00157

Gnomad AMI

AF:

0.0219

Gnomad AMR

AF:

0.00216

Gnomad ASJ

AF:

0.00173

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00972

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.00745

Gnomad OTH

AF:

0.00478

GnomAD4 exome

AF:

0.00596

AC:

2679

AN:

449840

Hom.:

Cov.:

AF XY:

0.00558

AC XY:

1323

AN XY:

236984

show subpopulations

African (AFR)

AF:

0.00128

AC:

AN:

12466

American (AMR)

AF:

0.00324

AC:

AN:

18812

Ashkenazi Jewish (ASJ)

AF:

0.000873

AC:

AN:

13740

East Asian (EAS)

AF:

0.00

AC:

AN:

31292

South Asian (SAS)

AF:

0.0000671

AC:

AN:

44718

European-Finnish (FIN)

AF:

0.0110

AC:

330

AN:

30008

Middle Eastern (MID)

AF:

0.00101

AC:

AN:

1978

European-Non Finnish (NFE)

AF:

0.00782

AC:

2117

AN:

270734

Other (OTH)

AF:

0.00529

AC:

138

AN:

26092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.501

Heterozygous variant carriers

167

333

500

666

833

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome 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

GnomAD4 genome

AF:

0.00489

AC:

745

AN:

152254

Hom.:

Cov.:

AF XY:

0.00472

AC XY:

351

AN XY:

74440

show subpopulations

African (AFR)

AF:

0.00156

AC:

AN:

41550

American (AMR)

AF:

0.00216

AC:

AN:

15296

Ashkenazi Jewish (ASJ)

AF:

0.00173

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5182

South Asian (SAS)

AF:

0.00

AC:

AN:

4814

European-Finnish (FIN)

AF:

0.00972

AC:

103

AN:

10602

Middle Eastern (MID)

AF:

0.00340

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00745

AC:

507

AN:

68020

Other (OTH)

AF:

0.00473

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

118

158

197

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

100

<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:

0.00625

Hom.:

Bravo

AF:

0.00436

Asia WGS

AF:

0.000866

AC:

AN:

3478

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (1)

Stickler syndrome type 1 (1)

Type II Collagenopathies (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.23

CADD

Benign

(source)

DANN

Benign

0.88

PhyloP100

1.6

Mutation Taster

=100/0

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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over