rs771858477

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM1PP2

The NM_000090.4(COL3A1):c.706C>T(p.Pro236Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000013 in 1,613,524 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000013 ( 0 hom. )

Consequence

COL3A1
NM_000090.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4B:1

Conservation

PhyloP100: 2.28

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 Uncertain_significance. Variant got 3 ACMG points.

PM1

In a modified_residue 4-hydroxyproline (size 0) in uniprot entity CO3A1_HUMAN

PP2

Missense variant in the COL3A1 gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 495 curated pathogenic missense variants (we use a threshold of 10). The gene has 19 curated benign missense variants. Gene score misZ: 4.0879 (above the threshold of 3.09). Trascript score misZ: 4.5995 (above the threshold of 3.09). GenCC associations: The gene is linked to Ehlers-Danlos syndrome, vascular type, autosomal dominant Ehlers-Danlos syndrome, vascular type, polymicrogyria with or without vascular-type Ehlers-Danlos syndrome.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COL3A1	NM_000090.4 link	c.706C>T	p.Pro236Ser	missense_variant	Exon 9 of 51	ENST00000304636.9	NP_000081.2	P02461-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
COL3A1	ENST00000304636.9 link	c.706C>T	p.Pro236Ser	missense_variant	Exon 9 of 51	1	NM_000090.4	ENSP00000304408.4		P02461-1
COL3A1	ENST00000450867.2 link	c.706C>T	p.Pro236Ser	missense_variant	Exon 9 of 50	1		ENSP00000415346.2		H7C435

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152100

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000239

AC:

AN:

250844

Hom.:

AF XY:

0.00000738

AC XY:

AN XY:

135570

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000579

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000654

GnomAD4 exome

AF:

0.0000130

AC:

AN:

1461424

Hom.:

Cov.:

AF XY:

0.00000825

AC XY:

AN XY:

727010

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000157

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000989

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152100

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74302

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.0000227

ExAC

AF:

0.0000247

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Familial thoracic aortic aneurysm and aortic dissection

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Dec 05, 2023	This missense variant replaces proline with serine at codon 236 of the COL3A1 protein. Computational prediction tools and conservation analyses are inconclusive regarding the impact of this variant on the protein function. Computational splicing tools suggest that this variant may not impact RNA splicing. To our knowledge, functional assays have not been performed for this variant nor has this variant been reported in individuals affected with cardiovascular disorders in the literature. This variant has been identified in 6/250844 chromosomes in the general population by the Genome Aggregation Database (gnomAD). Available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. -
Uncertain significance, criteria provided, single submitter	clinical testing	Ambry Genetics	Feb 15, 2016	The p.P236S variant (also known as c.706C>T), located in coding exon 9 of the COL3A1 gene, results from a C to T substitution at nucleotide position 706. The proline at codon 236 is replaced by serine, an amino acid with some similar properties. This variant was previously reported in the SNPDatabase as rs771858477. Based on data from ExAC, the T allele has an overall frequency of <0.01% (3/105680). This amino acid position is well conserved in available vertebrate species; however, serine is the reference amino acid in other vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this variant remains unclear. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Oct 17, 2013

Pro236Ser (CCC>TCC): c.706 C>T in exon 9 of the COL3A1 gene (NM_000090.3). The Pro236Ser variant in the COL3A1 gene has not been reported as a disease-causing mutation or as a benign polymorphism to our knowledge. Pro236Ser results in a non-conservative amino acid substitution of a non-polar Proline with a neutral, polar Serine at a position that is conserved in mammals. The Pro236Ser variant was not observed in approximately 6,500 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, indicating it is not a common benign variant in these populations. Mutations in nearby residues have been reported in association with Ehlers-Danlos syndrome (EDS), however, the majority of disease-causing missense mutations in the COL3A1 gene are Glycine substitutions in the Gly-X-Y repeats. Also, in silico analysis predicts Pro236Ser is benign to the protein structure/function. With the clinical and molecular information available at this time, we cannot definitively determine if Pro236Ser is a disease-causing mutation or a rare benign variant. At least 95% of patients with autosomal dominant Ehlers-Danlos syndrome type IV have been reported to have a mutation in the COL3A1 gene (Pepin M et al., 2011). The variant is found in TAAD panel(s). -

Ehlers-Danlos syndrome, type 4

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 22, 2024

This sequence change replaces proline, which is neutral and non-polar, with serine, which is neutral and polar, at codon 236 of the COL3A1 protein (p.Pro236Ser). This variant is present in population databases (rs771858477, gnomAD 0.009%). This variant has not been reported in the literature in individuals affected with COL3A1-related conditions. ClinVar contains an entry for this variant (Variation ID: 199713). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is not expected to disrupt COL3A1 protein function with a negative predictive value of 95%. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Connective tissue disorder

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Center for Human Genetics, Inc, Center for Human Genetics, Inc

Nov 01, 2016

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.090

BayesDel_addAF

Benign

-0.016

BayesDel_noAF

Uncertain

-0.060

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.74

D;.

Eigen

Benign

0.085

Eigen_PC

Uncertain

0.25

FATHMM_MKL

Uncertain

0.97

LIST_S2

Uncertain

0.86

D;D

M_CAP

Uncertain

0.12

MetaRNN

Uncertain

0.48

T;T

MetaSVM

Uncertain

0.57

MutationAssessor

Uncertain

2.5

M;M

PrimateAI

Uncertain

0.59

PROVEAN

Uncertain

-4.0

D;D

REVEL

Uncertain

0.42

Sift

Benign

0.090

T;T

Sift4G

Benign

0.24

T;T

Polyphen

0.040

B;.

Vest4

0.31

MutPred

0.41

Gain of phosphorylation at P236 (P = 0.0013);Gain of phosphorylation at P236 (P = 0.0013);

MVP

0.81

MPC

0.63

ClinPred

0.24

GERP RS

5.7

Varity_R

0.15

gMVP

0.55

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