rs61749897

Variant names:

Variant summary

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

The NM_001845.6(COL4A1):c.1815T>C(p.Pro605Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0749 in 1,613,636 control chromosomes in the GnomAD database, including 4,994 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.078 ( 455 hom., cov: 33)

Exomes 𝑓: 0.074 ( 4539 hom. )

Consequence

COL4A1
NM_001845.6 synonymous

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:11

Conservation

PhyloP100: -0.738

Publications

11 publications found

Variant links:

Genes affected

COL4A1 (HGNC:2202): (collagen type IV alpha 1 chain) This gene encodes a type IV collagen alpha protein. Type IV collagen proteins are integral components of basement membranes. This gene shares a bidirectional promoter with a paralogous gene on the opposite strand. The protein consists of an amino-terminal 7S domain, a triple-helix forming collagenous domain, and a carboxy-terminal non-collagenous domain. It functions as part of a heterotrimer and interacts with other extracellular matrix components such as perlecans, proteoglycans, and laminins. In addition, proteolytic cleavage of the non-collagenous carboxy-terminal domain results in a biologically active fragment known as arresten, which has anti-angiogenic and tumor suppressor properties. Mutations in this gene cause porencephaly, cerebrovascular disease, and renal and muscular defects. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2014]

COL4A1 Gene-Disease associations (from GenCC):

brain small vessel disease 1 with or without ocular anomalies
Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: G2P, Ambry Genetics, PanelApp Australia, Orphanet, Genomics England PanelApp
autosomal dominant familial hematuria-retinal arteriolar tortuosity-contractures syndrome
Inheritance: AD Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Genomics England PanelApp, Orphanet, Ambry Genetics
microangiopathy and leukoencephalopathy, pontine, autosomal dominant
Inheritance: AD Classification: MODERATE Submitted by: Ambry Genetics
familial porencephaly
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
pontine autosomal dominant microangiopathy with leukoencephalopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
retinal arterial tortuosity
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
muscular dystrophy-dystroglycanopathy, type A
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

COL4A1 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=-0.85).

BP6

Variant 13-110186467-A-G is Benign according to our data. Variant chr13-110186467-A-G is described in ClinVar as Benign. ClinVar VariationId is 195950.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-0.738 with no splicing effect.

BA1

GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.132 is higher than 0.05.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001845.6. 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
	COL4A1	NM_001845.6	MANE Select	c.1815T>C	p.Pro605Pro	synonymous	Exon 26 of 52	NP_001836.3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
COL4A1	ENST00000375820.10	TSL:1 MANE Select	c.1815T>C	p.Pro605Pro	synonymous	Exon 26 of 52	ENSP00000364979.4
COL4A1	ENST00000650424.2		c.1815T>C	p.Pro605Pro	synonymous	Exon 26 of 52	ENSP00000497477.2
COL4A1	ENST00000933608.1		c.1815T>C	p.Pro605Pro	synonymous	Exon 26 of 51	ENSP00000603667.1

Frequencies

GnomAD3 genomes

AF:

0.0784

AC:

11932

AN:

152144

Hom.:

455

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0873

Gnomad AMI

AF:

0.0395

Gnomad AMR

AF:

0.0826

Gnomad ASJ

AF:

0.0147

Gnomad EAS

AF:

0.140

Gnomad SAS

AF:

0.0692

Gnomad FIN

AF:

0.0913

Gnomad MID

AF:

0.0316

Gnomad NFE

AF:

0.0702

Gnomad OTH

AF:

0.0736

GnomAD2 exomes

AF:

0.0827

AC:

20623

AN:

249444

AF XY:

0.0793

show subpopulations

Gnomad AFR exome

AF:

0.0898

Gnomad AMR exome

AF:

0.125

Gnomad ASJ exome

AF:

0.0153

Gnomad EAS exome

AF:

0.136

Gnomad FIN exome

AF:

0.0894

Gnomad NFE exome

AF:

0.0690

Gnomad OTH exome

AF:

0.0647

GnomAD4 exome

AF:

0.0745

AC:

108857

AN:

1461374

Hom.:

4539

Cov.:

AF XY:

0.0738

AC XY:

53657

AN XY:

726986

show subpopulations

African (AFR)

AF:

0.0883

AC:

2956

AN:

33458

American (AMR)

AF:

0.121

AC:

5393

AN:

44702

Ashkenazi Jewish (ASJ)

AF:

0.0132

AC:

344

AN:

26110

East Asian (EAS)

AF:

0.160

AC:

6365

AN:

39700

South Asian (SAS)

AF:

0.0690

AC:

5946

AN:

86234

European-Finnish (FIN)

AF:

0.0875

AC:

4648

AN:

53150

Middle Eastern (MID)

AF:

0.0224

AC:

129

AN:

5760

European-Non Finnish (NFE)

AF:

0.0711

AC:

79013

AN:

1111876

Other (OTH)

AF:

0.0673

AC:

4063

AN:

60384

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.507

Heterozygous variant carriers

6471

12942

19413

25884

32355

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

3058

6116

9174

12232

15290

<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:

0.0784

AC:

11943

AN:

152262

Hom.:

455

Cov.:

AF XY:

0.0800

AC XY:

5952

AN XY:

74440

show subpopulations

African (AFR)

AF:

0.0872

AC:

3623

AN:

41548

American (AMR)

AF:

0.0826

AC:

1264

AN:

15300

Ashkenazi Jewish (ASJ)

AF:

0.0147

AC:

AN:

3472

East Asian (EAS)

AF:

0.140

AC:

725

AN:

5168

South Asian (SAS)

AF:

0.0692

AC:

334

AN:

4826

European-Finnish (FIN)

AF:

0.0913

AC:

969

AN:

10610

Middle Eastern (MID)

AF:

0.0374

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0702

AC:

4774

AN:

68018

Other (OTH)

AF:

0.0738

AC:

156

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.505

Heterozygous variant carriers

598

1196

1793

2391

2989

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

146

292

438

584

730

<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:

0.0664

Hom.:

142

Bravo

AF:

0.0805

Asia WGS

AF:

0.103

AC:

357

AN:

3478

EpiCase

AF:

0.0630

EpiControl

AF:

0.0630

ClinVar

ClinVar submissions as Germline

Significance:Benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not specified (6)

not provided (2)

Autosomal dominant familial hematuria-retinal arteriolar tortuosity-contractures syndrome (1)

Brain small vessel disease 1 with or without ocular anomalies (1)

Porencephalic cyst (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.85

CADD

Benign

6.8

(source)

DANN

Benign

0.32

PhyloP100

-0.74

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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over