rs35795890

Positions:

Variant summary

Our verdict is Benign. Variant got -17 ACMG points: 3P and 20B. PM1PP2BP4_StrongBP6_Very_StrongBS1BS2

The ENST00000304636.9(COL3A1):c.1804C>A(p.Pro602Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00556 in 1,613,986 control chromosomes in the GnomAD database, including 35 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P602A) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0051 ( 5 hom., cov: 30)

Exomes 𝑓: 0.0056 ( 30 hom. )

Consequence

COL3A1
ENST00000304636.9 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:17

Conservation

PhyloP100: 2.99

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -17 ACMG points.

PM1

In a hotspot region, there are 4 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 5 uncertain in ENST00000304636.9

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), COL3A1. . Gene score misZ 4.0879 (greater than the threshold 3.09). Trascript score misZ 4.5995 (greater than threshold 3.09). GenCC has associacion of gene with Ehlers-Danlos syndrome, vascular type, autosomal dominant Ehlers-Danlos syndrome, vascular type, polymicrogyria with or without vascular-type Ehlers-Danlos syndrome.

BP4

Computational evidence support a benign effect (MetaRNN=0.019590318).

BP6

Variant 2-188997207-C-A is Benign according to our data. Variant chr2-188997207-C-A is described in ClinVar as [Likely_benign]. Clinvar id is 136845.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr2-188997207-C-A is described in Lovd as [Likely_benign]. Variant chr2-188997207-C-A is described in Lovd as [Benign].

BS1

Variant frequency is greater than expected in population amr. gnomad4 allele frequency = 0.00513 (781/152128) while in subpopulation AMR AF= 0.00883 (135/15282). AF 95% confidence interval is 0.00762. There are 5 homozygotes in gnomad4. There are 358 alleles in male gnomad4 subpopulation. Median coverage is 30. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 5 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
COL3A1	NM_000090.4 linkuse as main transcript	c.1804C>A	p.Pro602Thr	missense_variant	25/51	ENST00000304636.9	NP_000081.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
COL3A1	ENST00000304636.9 linkuse as main transcript	c.1804C>A	p.Pro602Thr	missense_variant	25/51	1	NM_000090.4	ENSP00000304408	P1	P02461-1
COL3A1	ENST00000450867.2 linkuse as main transcript	c.1705C>A	p.Pro569Thr	missense_variant	24/50	1		ENSP00000415346

Frequencies

GnomAD3 genomes

AF:

0.00514

AC:

781

AN:

152010

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00324

Gnomad AMI

AF:

0.00220

Gnomad AMR

AF:

0.00885

Gnomad ASJ

AF:

0.00606

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000415

Gnomad FIN

AF:

0.00293

Gnomad MID

AF:

0.0158

Gnomad NFE

AF:

0.00620

Gnomad OTH

AF:

0.0139

GnomAD3 exomes

AF:

0.00455

AC:

1144

AN:

251446

Hom.:

AF XY:

0.00482

AC XY:

655

AN XY:

135898

show subpopulations

Gnomad AFR exome

AF:

0.00314

Gnomad AMR exome

AF:

0.00434

Gnomad ASJ exome

AF:

0.00506

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00111

Gnomad FIN exome

AF:

0.00240

Gnomad NFE exome

AF:

0.00662

Gnomad OTH exome

AF:

0.00863

GnomAD4 exome

AF:

0.00561

AC:

8200

AN:

1461858

Hom.:

Cov.:

AF XY:

0.00558

AC XY:

4056

AN XY:

727230

show subpopulations

Gnomad4 AFR exome

AF:

0.00376

Gnomad4 AMR exome

AF:

0.00440

Gnomad4 ASJ exome

AF:

0.00539

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00148

Gnomad4 FIN exome

AF:

0.00256

Gnomad4 NFE exome

AF:

0.00624

Gnomad4 OTH exome

AF:

0.00667

GnomAD4 genome

AF:

0.00513

AC:

781

AN:

152128

Hom.:

Cov.:

AF XY:

0.00481

AC XY:

358

AN XY:

74370

show subpopulations

Gnomad4 AFR

AF:

0.00323

Gnomad4 AMR

AF:

0.00883

Gnomad4 ASJ

AF:

0.00606

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000415

Gnomad4 FIN

AF:

0.00293

Gnomad4 NFE

AF:

0.00621

Gnomad4 OTH

AF:

0.0137

Alfa

AF:

0.00660

Hom.:

Bravo

AF:

0.00558

TwinsUK

AF:

0.00405

AC:

ALSPAC

AF:

0.00389

AC:

ESP6500AA

AF:

0.00295

AC:

ESP6500EA

AF:

0.00616

AC:

ExAC

AF:

0.00440

AC:

534

Asia WGS

AF:

0.000866

AC:

AN:

3478

EpiCase

AF:

0.00812

EpiControl

AF:

0.00782

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:17

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:6

Likely benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
Benign, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Feb 29, 2016	- -
Likely benign, no assertion criteria provided	clinical testing	Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	-	- -
Benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Feb 21, 2023	- -
Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Nov 01, 2024	COL3A1: BS2 -
Likely benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	-	- -

Ehlers-Danlos syndrome, type 4

Benign:4

Benign, criteria provided, single submitter	clinical testing	Genomic Diagnostic Laboratory, Division of Genomic Diagnostics, Children's Hospital of Philadelphia	Jul 22, 2015	- -
Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Feb 01, 2024	- -
Likely benign, criteria provided, single submitter	clinical testing	Mendelics	May 28, 2019	- -
Benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 12, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

not specified

Benign:3

Benign, criteria provided, single submitter	clinical testing	GeneDx	May 31, 2013	This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -
Benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Benign, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	-	- -

Familial thoracic aortic aneurysm and aortic dissection

Benign:3

Benign, criteria provided, single submitter	clinical testing	CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario	May 17, 2016	- -
Benign, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Jun 12, 2018	- -
Benign, criteria provided, single submitter	clinical testing	Ambry Genetics	Jun 26, 2014	This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Ehlers-Danlos syndrome

Benign:1

Benign, criteria provided, single submitter

clinical testing

Genome Diagnostics Laboratory, The Hospital for Sick Children

Mar 12, 2022

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.059

BayesDel_addAF

Benign

-0.21

BayesDel_noAF

Uncertain

-0.070

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Uncertain

0.74

D;.

Eigen

Uncertain

0.36

Eigen_PC

Uncertain

0.47

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.96

D;D

MetaRNN

Benign

0.020

T;T

MetaSVM

Uncertain

0.47

MutationAssessor

Uncertain

2.2

M;M

MutationTaster

Benign

1.0

D;D

PrimateAI

Uncertain

0.55

PROVEAN

Uncertain

-2.9

D;D

REVEL

Uncertain

0.43

Sift

Benign

0.26

T;T

Sift4G

Benign

0.19

T;T

Polyphen

0.50

P;.

Vest4

0.54

MVP

0.67

MPC

0.70

ClinPred

0.032

GERP RS

6.0

Varity_R

0.14

gMVP

0.51

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over