NM_000393.5:c.3373G>C

Variant names:

• chr2-189043249-C-G
• rs151187317
• NM_000393.5:c.3373G>C

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_000393.5(COL5A2):​c.3373G>C​(p.Gly1125Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 12/21 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: COL5A2 NM_000393.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.88

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]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.987

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COL5A2	NM_000393.5	c.3373G>C	p.Gly1125Arg	missense_variant	Exon 48 of 54	ENST00000374866.9	NP_000384.2
COL5A2	XM_011510573.4	c.3235G>C	p.Gly1079Arg	missense_variant	Exon 51 of 57		XP_011508875.1
COL5A2	XM_047443251.1	c.3235G>C	p.Gly1079Arg	missense_variant	Exon 53 of 59		XP_047299207.1
COL5A2	XM_047443252.1	c.3235G>C	p.Gly1079Arg	missense_variant	Exon 52 of 58		XP_047299208.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
COL5A2	ENST00000374866.9	c.3373G>C	p.Gly1125Arg	missense_variant	Exon 48 of 54	1	NM_000393.5	ENSP00000364000.3
COL5A2	ENST00000618828.1	c.2212G>C	p.Gly738Arg	missense_variant	Exon 41 of 47	5		ENSP00000482184.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Ehlers-Danlos syndrome, classic type, 1 Uncertain:1

Jan 09, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces glycine, which is neutral and non-polar, with arginine, which is basic and polar, at codon 1125 of the COL5A2 protein (p.Gly1125Arg). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with COL5A2-related conditions. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt COL5A2 protein function with a positive predictive value of 80%. 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. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.58	D
BayesDel_noAF	Pathogenic	0.60
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.90	D;T;D
Eigen	Pathogenic	1.0
Eigen_PC	Pathogenic	0.93
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.98	.;D;D
M_CAP	Pathogenic	0.47	D
MetaRNN	Pathogenic	0.99	D;D;D
MetaSVM	Pathogenic	0.99	D
MutationAssessor	Pathogenic	4.1	H;.;H
PrimateAI	Pathogenic	0.90	D
PROVEAN	Pathogenic	-7.2	D;.;.
REVEL	Pathogenic	1.0
Sift	Pathogenic	0.0	D;.;.
Sift4G	Pathogenic	0.0010	D;D;.
Polyphen		1.0	D;.;D
Vest4		0.98
MutPred		0.99		Gain of MoRF binding (P = 0.0137);.;Gain of MoRF binding (P = 0.0137);
MVP		0.99
MPC		0.31
ClinPred		1.0	D
GERP RS		5.2
Varity_R		0.97
gMVP		0.98

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

Other links and lift over

dbSNP: rs151187317; hg19: chr2-189907975;