13-110169729-G-C

Variant names:

Variant summary

Our verdict is Benign. The variant received -18 ACMG points: 2P and 20B. PM1BP4_StrongBP6_Very_StrongBS1BS2

The NM_001845.6(COL4A1):c.3776C>G(p.Pro1259Arg) variant causes a missense change. The variant allele was found at a frequency of 0.000814 in 1,613,980 control chromosomes in the GnomAD database, including 5 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0033 ( 2 hom., cov: 30)

Exomes 𝑓: 0.00056 ( 3 hom. )

Consequence

COL4A1
NM_001845.6 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:6

Conservation

PhyloP100: 5.19

Publications

4 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 -18 ACMG points.

PM1

In a hotspot region, there are 6 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 2 uncertain in NM_001845.6

BP4

Computational evidence support a benign effect (MetaRNN=0.02102846).

BP6

Variant 13-110169729-G-C is Benign according to our data. Variant chr13-110169729-G-C is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 289290.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00325 (495/152110) while in subpopulation AFR AF = 0.00972 (403/41482). AF 95% confidence interval is 0.00893. There are 2 homozygotes in GnomAd4. There are 237 alleles in the male GnomAd4 subpopulation. Median coverage is 30. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 2 AD,AR gene

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

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	COL4A1	NM_001845.6	MANE Select	c.3776C>G	p.Pro1259Arg	missense	Exon 43 of 52	NP_001836.3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
COL4A1	ENST00000375820.10	TSL:1 MANE Select	c.3776C>G	p.Pro1259Arg	missense	Exon 43 of 52	ENSP00000364979.4
COL4A1	ENST00000650424.2		c.3776C>G	p.Pro1259Arg	missense	Exon 43 of 52	ENSP00000497477.2
COL4A1	ENST00000615732.3	TSL:5	c.3584C>G	p.Pro1195Arg	missense	Exon 43 of 52	ENSP00000478222.3

Frequencies

GnomAD3 genomes

AF:

0.00325

AC:

494

AN:

151992

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00972

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00432

Gnomad ASJ

AF:

0.000289

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000208

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000265

Gnomad OTH

AF:

0.00287

GnomAD2 exomes

AF:

0.00109

AC:

275

AN:

251232

AF XY:

0.000869

show subpopulations

Gnomad AFR exome

AF:

0.0109

Gnomad AMR exome

AF:

0.00171

Gnomad ASJ exome

AF:

0.0000992

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000462

Gnomad NFE exome

AF:

0.000238

Gnomad OTH exome

AF:

0.00163

GnomAD4 exome

AF:

0.000560

AC:

818

AN:

1461870

Hom.:

Cov.:

AF XY:

0.000499

AC XY:

363

AN XY:

727234

show subpopulations

African (AFR)

AF:

0.0111

AC:

372

AN:

33480

American (AMR)

AF:

0.00172

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.000268

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.0000232

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.0000187

AC:

AN:

53402

Middle Eastern (MID)

AF:

0.00225

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000234

AC:

260

AN:

1112010

Other (OTH)

AF:

0.00142

AC:

AN:

60394

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.482

Heterozygous variant carriers

110

165

220

275

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

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

GnomAD4 genome

AF:

0.00325

AC:

495

AN:

152110

Hom.:

Cov.:

AF XY:

0.00319

AC XY:

237

AN XY:

74366

show subpopulations

African (AFR)

AF:

0.00972

AC:

403

AN:

41482

American (AMR)

AF:

0.00432

AC:

AN:

15282

Ashkenazi Jewish (ASJ)

AF:

0.000289

AC:

AN:

3464

East Asian (EAS)

AF:

0.00

AC:

AN:

5136

South Asian (SAS)

AF:

0.000208

AC:

AN:

4814

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10600

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000265

AC:

AN:

68016

Other (OTH)

AF:

0.00284

AC:

AN:

2110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.505

Heterozygous variant carriers

102

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome 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

Alfa

AF:

0.000735

Hom.:

Bravo

AF:

0.00340

ESP6500AA

AF:

0.00908

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.000898

AC:

109

Asia WGS

AF:

0.000577

AC:

AN:

3478

EpiCase

AF:

0.000109

EpiControl

AF:

0.000119

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:6

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:5

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

Apr 01, 2020

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Jul 01, 2025

CeGaT Center for Human Genetics Tuebingen

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

COL4A1: BS1

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

May 31, 2017

Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

not specified

Benign:1

Aug 03, 2016

Eurofins Ntd Llc (ga)

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.10

BayesDel_addAF

Benign

-0.14

BayesDel_noAF

Uncertain

0.030

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.82

Eigen

Uncertain

0.56

Eigen_PC

Uncertain

0.52

FATHMM_MKL

Uncertain

0.96

LIST_S2

Uncertain

0.92

M_CAP

Uncertain

0.20

MetaRNN

Benign

0.021

MetaSVM

Uncertain

0.67

MutationAssessor

Benign

0.58

PhyloP100

5.2

PrimateAI

Uncertain

0.69

PROVEAN

Uncertain

-4.2

REVEL

Uncertain

0.59

Sift

Benign

0.085

Sift4G

Uncertain

0.030

Polyphen

1.0

Vest4

0.53

MVP

0.82

MPC

1.2

ClinPred

0.029

GERP RS

5.5

PromoterAI

-0.0076

Neutral

(source)

Varity_R

0.13

gMVP

0.78

Mutation Taster

=88/12

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

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over