rs147729713

Variant names:

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_StrongBP6BP7BS1BS2

The NM_000093.5(COL5A1):c.804C>T(p.Gly268Gly) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000188 in 1,613,994 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000085 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00020 ( 1 hom. )

Consequence

COL5A1
NM_000093.5 synonymous

Scores

Clinical Significance

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

Conservation

PhyloP100: -3.60

Variant links:

Genes affected

COL5A1 (HGNC:2209): (collagen type V alpha 1 chain) This gene encodes an alpha chain for one of the low abundance fibrillar collagens. Fibrillar collagen molecules are trimers that can be composed of one or more types of alpha chains. Type V collagen is found in tissues containing type I collagen and appears to regulate the assembly of heterotypic fibers composed of both type I and type V collagen. This gene product is closely related to type XI collagen and it is possible that the collagen chains of types V and XI constitute a single collagen type with tissue-specific chain combinations. The encoded procollagen protein occurs commonly as the heterotrimer pro-alpha1(V)-pro-alpha1(V)-pro-alpha2(V). Mutations in this gene are associated with Ehlers-Danlos syndrome, types I and II. Alternative splicing of this gene results in multiple transcript variants. [provided by RefSeq, May 2013]

COL5A1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -14 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.57).

BP6

Variant 9-134728687-C-T is Benign according to our data. Variant chr9-134728687-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 212921.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=3, Benign=1, Uncertain_significance=4}.

BP7

Synonymous conserved (PhyloP=-3.6 with no splicing effect.

BS1

Variant frequency is greater than expected in population nfe. gnomad4_exome allele frequency = 0.000198 (290/1461802) while in subpopulation NFE AF= 0.000252 (280/1111996). AF 95% confidence interval is 0.000227. There are 1 homozygotes in gnomad4_exome. There are 142 alleles in male gnomad4_exome subpopulation. Median coverage is 34. This position pass quality control queck.

BS2

High AC in GnomAd4 at 13 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COL5A1	NM_000093.5 link	c.804C>T	p.Gly268Gly	synonymous_variant	Exon 6 of 66	ENST00000371817.8	NP_000084.3	P20908-1A0A024R8E5B2ZZ86Q59EE7
COL5A1	NM_001278074.1 link	c.804C>T	p.Gly268Gly	synonymous_variant	Exon 6 of 66		NP_001265003.1	B2ZZ86Q59EE7
COL5A1	XM_017014266.3 link	c.804C>T	p.Gly268Gly	synonymous_variant	Exon 6 of 65		XP_016869755.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
COL5A1	ENST00000371817.8 link	c.804C>T	p.Gly268Gly	synonymous_variant	Exon 6 of 66	1	NM_000093.5	ENSP00000360882.3		P20908-1
COL5A1	ENST00000371820.4 link	c.804C>T	p.Gly268Gly	synonymous_variant	Exon 6 of 66	2		ENSP00000360885.4		P20908-2H7BY82

Frequencies

GnomAD3 genomes

AF:

0.0000854

AC:

AN:

152192

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000145

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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:

0.0000882

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000994

AC:

AN:

251388

Hom.:

AF XY:

0.000110

AC XY:

AN XY:

135878

show subpopulations

Gnomad AFR exome

AF:

0.000246

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000653

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000158

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000198

AC:

290

AN:

1461802

Hom.:

Cov.:

AF XY:

0.000195

AC XY:

142

AN XY:

727214

show subpopulations

Gnomad4 AFR exome

AF:

0.0000896

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000252

Gnomad4 OTH exome

AF:

0.0000662

GnomAD4 genome

AF:

0.0000854

AC:

AN:

152192

Hom.:

Cov.:

AF XY:

0.000148

AC XY:

AN XY:

74342

show subpopulations

Gnomad4 AFR

AF:

0.000145

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000882

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000232

Hom.:

Bravo

AF:

0.0000869

EpiCase

AF:

0.00

EpiControl

AF:

0.000356

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4Benign:4

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:2Benign:2

Mar 16, 2022

Mayo Clinic Laboratories, Mayo Clinic

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

BS1, BP4, BP7, PS3_supporting -

Mar 10, 2022

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Aug 01, 2023

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

COL5A1: BP4, BP7 -

Mar 03, 2016

Eurofins Ntd Llc (ga)

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Familial thoracic aortic aneurysm and aortic dissection

Uncertain:1

Aug 09, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.804C>T variant (also known as p.G268G), located in coding exon 6, results from a C to T substitution at nucleotide position 804 of the COL5A1 gene. This nucleotide substitution does not change the amino acid at codon 268. Using the BDGP and ESEfinder splice site prediction tools, this alteration is predicted to create a new alternate splice donor site. RNA studies have demonstrated that this alteration results in an incomplete splice defect; the clinical impact of this abnormal splicing is unknown at this time (Ambry internal data). Based on data from gnomAD, the T allele has an overall frequency of 0.01% (28/282766) total alleles studied. The highest observed frequency was 0.02% (21/129140) of European (non-Finnish) alleles. This nucleotide position is not conserved in available vertebrate species. Since supporting evidence is limited at this time, the clinical significance of this variant remains unclear. -

Ehlers-Danlos syndrome type 7A

Uncertain:1

Jun 14, 2016

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not specified

Benign:1

Sep 05, 2014

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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. -

Ehlers-Danlos syndrome, classic type, 1

Benign:1

Jan 19, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.57

CADD

Benign

0.25

DANN

Benign

0.79

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

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