2-188997173-T-C

Variant names:

Variant summary

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

The NM_000090.4(COL3A1):c.1770T>C(p.Pro590Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00244 in 1,613,776 control chromosomes in the GnomAD database, including 98 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.014 ( 47 hom., cov: 30)

Exomes 𝑓: 0.0013 ( 51 hom. )

Consequence

COL3A1
NM_000090.4 synonymous

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:12

Conservation

PhyloP100: 1.81

Publications

2 publications found

Variant links:

Genes affected

COL3A1 (HGNC:2201): (collagen type III alpha 1 chain) This gene encodes the pro-alpha1 chains of type III collagen, a fibrillar collagen that is found in extensible connective tissues such as skin, lung, uterus, intestine and the vascular system, frequently in association with type I collagen. Mutations in this gene are associated with Ehlers-Danlos syndrome type IV, and with aortic and arterial aneurysms. [provided by R. Dalgleish, Feb 2008]

COL3A1 Gene-Disease associations (from GenCC):

autosomal dominant Ehlers-Danlos syndrome, vascular type
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, PanelApp Australia, Labcorp Genetics (formerly Invitae), Laboratory for Molecular Medicine, Genomics England PanelApp
Ehlers-Danlos syndrome, vascular type
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
polymicrogyria with or without vascular-type Ehlers-Danlos syndrome
Inheritance: AR Classification: STRONG Submitted by: PanelApp Australia, Labcorp Genetics (formerly Invitae)

COL3A1 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=-0.42).

BP6

Variant 2-188997173-T-C is Benign according to our data. Variant chr2-188997173-T-C is described in ClinVar as Benign. ClinVar VariationId is 136844.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=1.81 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.0136 (2063/152116) while in subpopulation AFR AF = 0.0477 (1977/41462). AF 95% confidence interval is 0.0459. There are 47 homozygotes in GnomAd4. There are 970 alleles in the male GnomAd4 subpopulation. Median coverage is 30. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 47 AD,AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000090.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	COL3A1	NM_000090.4	MANE Select	c.1770T>C	p.Pro590Pro	synonymous	Exon 25 of 51	NP_000081.2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
COL3A1	ENST00000304636.9	TSL:1 MANE Select	c.1770T>C	p.Pro590Pro	synonymous	Exon 25 of 51	ENSP00000304408.4
COL3A1	ENST00000450867.2	TSL:1	c.1671T>C	p.Pro557Pro	synonymous	Exon 24 of 50	ENSP00000415346.2
COL3A1	ENST00000879201.1		c.1761T>C	p.Pro587Pro	synonymous	Exon 25 of 51	ENSP00000549260.1

Frequencies

GnomAD3 genomes

AF:

0.0135

AC:

2057

AN:

151998

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0477

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00381

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000415

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000103

Gnomad OTH

AF:

0.00957

GnomAD2 exomes

AF:

0.00310

AC:

780

AN:

251304

AF XY:

0.00219

show subpopulations

Gnomad AFR exome

AF:

0.0430

Gnomad AMR exome

AF:

0.00199

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000528

Gnomad OTH exome

AF:

0.00147

GnomAD4 exome

AF:

0.00128

AC:

1877

AN:

1461660

Hom.:

Cov.:

AF XY:

0.00114

AC XY:

832

AN XY:

727162

show subpopulations

African (AFR)

AF:

0.0480

AC:

1598

AN:

33326

American (AMR)

AF:

0.00210

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.000104

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53418

Middle Eastern (MID)

AF:

0.00192

AC:

AN:

5740

European-Non Finnish (NFE)

AF:

0.0000198

AC:

AN:

1111984

Other (OTH)

AF:

0.00237

AC:

143

AN:

60380

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.488

Heterozygous variant carriers

107

215

322

430

537

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

100

150

200

250

<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:

0.0136

AC:

2063

AN:

152116

Hom.:

Cov.:

AF XY:

0.0130

AC XY:

970

AN XY:

74366

show subpopulations

African (AFR)

AF:

0.0477

AC:

1977

AN:

41462

American (AMR)

AF:

0.00380

AC:

AN:

15258

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5166

South Asian (SAS)

AF:

0.000208

AC:

AN:

4818

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10616

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000103

AC:

AN:

68008

Other (OTH)

AF:

0.00947

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.508

Heterozygous variant carriers

186

278

371

464

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

120

<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:

0.00773

Hom.:

Bravo

AF:

0.0155

Asia WGS

AF:

0.00144

AC:

AN:

3478

ClinVar

ClinVar submissions as Germline

Significance:Benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

Ehlers-Danlos syndrome, type 4 (4)

not specified (3)

Familial thoracic aortic aneurysm and aortic dissection (2)

not provided (2)

Ehlers-Danlos syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.42

CADD

Benign

(source)

DANN

Benign

0.78

PhyloP100

1.8

Mutation Taster

=99/1

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