NM_000393.5:c.2492G>C

Variant names:

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 1P and 10B. PP3BP4BP6BS1BS2

The NM_000393.5(COL5A2):c.2492G>C(p.Gly831Ala) variant causes a missense change. The variant allele was found at a frequency of 0.0000886 in 1,613,518 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. G831G) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00036 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000060 ( 0 hom. )

Consequence

COL5A2
NM_000393.5 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3B:2

Conservation

PhyloP100: 6.05

Publications

1 publications found

Variant links:

Genes affected

COL5A2 (HGNC:2210): (collagen type V alpha 2 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. Mutations in this gene are associated with Ehlers-Danlos syndrome, types I and II. [provided by RefSeq, Jul 2008]

COL5A2 Gene-Disease associations (from GenCC):

Ehlers-Danlos syndrome
Inheritance: AD Classification: DEFINITIVE Submitted by: G2P
Ehlers-Danlos syndrome, classic type
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
Ehlers-Danlos syndrome, classic type, 2
Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp

COL5A2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -9 ACMG points.

PP3

Multiple lines of computational evidence support a deleterious effect 8: BayesDel_addAF, BayesDel_noAF, Eigen, MutationAssessor, PrimateAI, PROVEAN, REVEL, REVEL [when AlphaMissense, max_spliceai, FATHMM_MKL, MetaRNN, MutationTaster was below the threshold]

BP4

Computational evidence support a benign effect (MetaRNN=0.41920644).

BP6

Variant 2-189053902-C-G is Benign according to our data. Variant chr2-189053902-C-G is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 255998.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.000361 (55/152218) while in subpopulation AFR AF = 0.00108 (45/41518). AF 95% confidence interval is 0.000832. There are 0 homozygotes in GnomAd4. There are 28 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High AC in GnomAd4 at 55 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein
COL5A2	NM_000393.5 link	c.2492G>C	p.Gly831Ala	missense_variant	Exon 37 of 54	ENST00000374866.9	NP_000384.2
COL5A2	XM_011510573.4 link	c.2354G>C	p.Gly785Ala	missense_variant	Exon 40 of 57		XP_011508875.1
COL5A2	XM_047443251.1 link	c.2354G>C	p.Gly785Ala	missense_variant	Exon 42 of 59		XP_047299207.1
COL5A2	XM_047443252.1 link	c.2354G>C	p.Gly785Ala	missense_variant	Exon 41 of 58		XP_047299208.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
COL5A2	ENST00000374866.9 link	c.2492G>C	p.Gly831Ala	missense_variant	Exon 37 of 54	1	NM_000393.5	ENSP00000364000.3
COL5A2	ENST00000618828.1 link	c.1331G>C	p.Gly444Ala	missense_variant	Exon 30 of 47	5		ENSP00000482184.1

Frequencies

GnomAD3 genomes

AF:

0.000355

AC:

AN:

152100

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00106

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000458

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.000479

GnomAD2 exomes

AF:

0.0000996

AC:

AN:

250992

AF XY:

0.0000811

show subpopulations

Gnomad AFR exome

AF:

0.00111

Gnomad AMR exome

AF:

0.0000868

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000176

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000602

AC:

AN:

1461300

Hom.:

Cov.:

AF XY:

0.0000564

AC XY:

AN XY:

727004

show subpopulations

African (AFR)

AF:

0.00152

AC:

AN:

33456

American (AMR)

AF:

0.000157

AC:

AN:

44708

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26120

East Asian (EAS)

AF:

0.00

AC:

AN:

39686

South Asian (SAS)

AF:

0.0000928

AC:

AN:

86200

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53404

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.00000360

AC:

AN:

1111582

Other (OTH)

AF:

0.000298

AC:

AN:

60378

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.443

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome 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

GnomAD4 genome

AF:

0.000361

AC:

AN:

152218

Hom.:

Cov.:

AF XY:

0.000376

AC XY:

AN XY:

74436

show subpopulations

African (AFR)

AF:

0.00108

AC:

AN:

41518

American (AMR)

AF:

0.000458

AC:

AN:

15288

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5184

South Asian (SAS)

AF:

0.000207

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10606

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

68012

Other (OTH)

AF:

0.000474

AC:

AN:

2108

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.499

Heterozygous variant carriers

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:

0.000178

Hom.:

Bravo

AF:

0.000363

ESP6500AA

AF:

0.000454

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000988

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000594

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:3Benign:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Dec 08, 2021

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Has not been previously published as pathogenic or benign to our knowledge; In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Reported in ClinVar (ClinVar Variant ID# 255998; Landrum et al., 2016); This variant is associated with the following publications: (PMID: 22696272, 24077912) -

Jun 16, 2023

Mayo Clinic Laboratories, Mayo Clinic

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

BS1, PP3, PM1 -

Familial thoracic aortic aneurysm and aortic dissection

Uncertain:1

May 07, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.G831A variant (also known as c.2492G>C), located in coding exon 37 of the COL5A2 gene, results from a G to C substitution at nucleotide position 2492. The glycine at codon 831 is replaced by alanine, an amino acid with similar properties. Internal structural analysis indicates that this alteration disrupts the characteristic G-X-Y motif of the triple helical domain in the COL5A2 protein and inserts a bulky side chain into a sterically-constrained region (Bella J et al. Science. 1994;266:75-81; Hohenester E et al. Proc. Natl. Acad. Sci.U.S.A. 2008;105:18273-7; Ambry internal data). Glycine substitutions in the triple helical domain of COL5A2 have been reported in association with classic Ehlers-Danlos syndrome (cEDS), but the number of affected individuals is limited and several other COL5A2 glycine substitutions in the triple helical domain (e.g., p.G951E and p.G831A) are too common for disease in population databases (Symoens S et al. Hum. Mutat., 2012 Oct;33:1485-93; Ritelli M et al. Orphanet J Rare Dis. 2013 Apr;8:58). This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

not specified

Benign:1

PreventionGenetics, part of Exact Sciences

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Ehlers-Danlos syndrome, classic type, 1

Benign:1

Dec 25, 2024

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

AlphaMissense

Benign

0.23

BayesDel_addAF

Pathogenic

0.23

BayesDel_noAF

Pathogenic

0.55

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.81

D;T;D

Eigen

Pathogenic

0.85

Eigen_PC

Pathogenic

0.82

FATHMM_MKL

Pathogenic

1.0

LIST_S2

Uncertain

0.95

.;D;D

M_CAP

Uncertain

0.23

MetaRNN

Benign

0.42

T;T;T

MetaSVM

Pathogenic

1.0

MutationAssessor

Pathogenic

4.0

H;.;H

PhyloP100

6.1

PrimateAI

Pathogenic

0.89

PROVEAN

Pathogenic

-5.0

D;.;.

REVEL

Pathogenic

0.88

Sift

Benign

0.041

D;.;.

Sift4G

Uncertain

0.036

D;D;.

Polyphen

1.0

D;.;D

Vest4

0.79

MVP

0.97

MPC

0.28

ClinPred

0.87

GERP RS

5.9

Varity_R

0.37

gMVP

0.95

Mutation Taster

=52/48

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over