NM_001845.6:c.432T>A

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.432T>A(p.Ala144Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.47 in 1,613,492 control chromosomes in the GnomAD database, including 180,476 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.44 ( 14787 hom., cov: 31)

Exomes 𝑓: 0.47 ( 165689 hom. )

Consequence

COL4A1
NM_001845.6 synonymous

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:14

Conservation

PhyloP100: -0.0960

Publications

25 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: Ambry Genetics, Orphanet, G2P, Genomics England PanelApp
autosomal dominant familial hematuria-retinal arteriolar tortuosity-contractures syndrome
Inheritance: AD Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Ambry Genetics, Genomics England PanelApp, Orphanet
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=-0.86).

BP6

Variant 13-110211878-A-T is Benign according to our data. Variant chr13-110211878-A-T is described in ClinVar as Benign. ClinVar VariationId is 258254.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-0.096 with no splicing effect.

BA1

GnomAd4 highest subpopulation (SAS) allele frequency at 95% confidence interval = 0.576 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.432T>A	p.Ala144Ala	synonymous	Exon 7 of 52	NP_001836.3	P02462-1
	COL4A1	NM_001303110.2		c.432T>A	p.Ala144Ala	synonymous	Exon 7 of 25	NP_001290039.1	P02462-2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
COL4A1	ENST00000375820.10	TSL:1 MANE Select	c.432T>A	p.Ala144Ala	synonymous	Exon 7 of 52	ENSP00000364979.4	P02462-1
COL4A1	ENST00000543140.6	TSL:1	c.432T>A	p.Ala144Ala	synonymous	Exon 7 of 25	ENSP00000443348.1	P02462-2
COL4A1	ENST00000650424.2		c.432T>A	p.Ala144Ala	synonymous	Exon 7 of 52	ENSP00000497477.2	A0A3B3ISV3

Frequencies

GnomAD3 genomes

AF:

0.437

AC:

66384

AN:

151860

Hom.:

14785

Cov.:

show subpopulations

Gnomad AFR

AF:

0.371

Gnomad AMI

AF:

0.447

Gnomad AMR

AF:

0.416

Gnomad ASJ

AF:

0.517

Gnomad EAS

AF:

0.517

Gnomad SAS

AF:

0.595

Gnomad FIN

AF:

0.409

Gnomad MID

AF:

0.494

Gnomad NFE

AF:

0.464

Gnomad OTH

AF:

0.475

GnomAD2 exomes

AF:

0.467

AC:

117374

AN:

251402

AF XY:

0.476

show subpopulations

Gnomad AFR exome

AF:

0.369

Gnomad AMR exome

AF:

0.404

Gnomad ASJ exome

AF:

0.528

Gnomad EAS exome

AF:

0.496

Gnomad FIN exome

AF:

0.412

Gnomad NFE exome

AF:

0.466

Gnomad OTH exome

AF:

0.480

GnomAD4 exome

AF:

0.474

AC:

692386

AN:

1461514

Hom.:

165689

Cov.:

AF XY:

0.478

AC XY:

347442

AN XY:

727068

show subpopulations

African (AFR)

AF:

0.359

AC:

12004

AN:

33474

American (AMR)

AF:

0.401

AC:

17947

AN:

44720

Ashkenazi Jewish (ASJ)

AF:

0.530

AC:

13853

AN:

26130

East Asian (EAS)

AF:

0.544

AC:

21601

AN:

39696

South Asian (SAS)

AF:

0.584

AC:

50356

AN:

86214

European-Finnish (FIN)

AF:

0.417

AC:

22253

AN:

53396

Middle Eastern (MID)

AF:

0.516

AC:

2974

AN:

5764

European-Non Finnish (NFE)

AF:

0.470

AC:

522331

AN:

1111748

Other (OTH)

AF:

0.481

AC:

29067

AN:

60372

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.480

Heterozygous variant carriers

19378

38757

58135

77514

96892

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

15616

31232

46848

62464

78080

<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:

0.437

AC:

66399

AN:

151978

Hom.:

14787

Cov.:

AF XY:

0.437

AC XY:

32450

AN XY:

74280

show subpopulations

African (AFR)

AF:

0.371

AC:

15362

AN:

41450

American (AMR)

AF:

0.416

AC:

6358

AN:

15274

Ashkenazi Jewish (ASJ)

AF:

0.517

AC:

1794

AN:

3468

East Asian (EAS)

AF:

0.516

AC:

2654

AN:

5140

South Asian (SAS)

AF:

0.595

AC:

2860

AN:

4810

European-Finnish (FIN)

AF:

0.409

AC:

4323

AN:

10570

Middle Eastern (MID)

AF:

0.486

AC:

143

AN:

294

European-Non Finnish (NFE)

AF:

0.464

AC:

31502

AN:

67952

Other (OTH)

AF:

0.472

AC:

996

AN:

2110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.504

Heterozygous variant carriers

1871

3742

5613

7484

9355

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

626

1252

1878

2504

3130

<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:

0.463

Hom.:

5463

Bravo

AF:

0.433

Asia WGS

AF:

0.542

AC:

1884

AN:

3478

EpiCase

AF:

0.481

EpiControl

AF:

0.482

ClinVar

ClinVar submissions

Significance:Benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not specified (7)

Autosomal dominant familial hematuria-retinal arteriolar tortuosity-contractures syndrome (2)

Brain small vessel disease 1 with or without ocular anomalies (2)

not provided (2)

Porencephalic cyst (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.86

CADD

Benign

0.34

(source)

DANN

Benign

0.43

PhyloP100

-0.096

Mutation Taster

=100/0

polymorphism (auto)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.040

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