rs146175905

Positions:

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 1P and 7B. PP2BP4_ModerateBP6BS2

The ENST00000374866.9(COL5A2):c.2117C>T(p.Pro706Leu) variant causes a missense change. The variant allele was found at a frequency of 0.0000484 in 1,613,068 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. P706P) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00016 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000037 ( 0 hom. )

Consequence

COL5A2
ENST00000374866.9 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 4.18

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), COL5A2. . Gene score misZ 2.4395 (greater than the threshold 3.09). Trascript score misZ 3.3523 (greater than threshold 3.09). GenCC has associacion of gene with Ehlers-Danlos syndrome, classic type, 2, Ehlers-Danlos syndrome, classic type.

BP4

Computational evidence support a benign effect (MetaRNN=0.109802485).

BP6

Variant 2-189058862-G-A is Benign according to our data. Variant chr2-189058862-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 459732.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=2, Likely_benign=1}.

BS2

High AC in GnomAd4 at 24 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
COL5A2	NM_000393.5 linkuse as main transcript	c.2117C>T	p.Pro706Leu	missense_variant	32/54	ENST00000374866.9	NP_000384.2
COL5A2	XM_011510573.4 linkuse as main transcript	c.1979C>T	p.Pro660Leu	missense_variant	35/57		XP_011508875.1
COL5A2	XM_047443251.1 linkuse as main transcript	c.1979C>T	p.Pro660Leu	missense_variant	37/59		XP_047299207.1
COL5A2	XM_047443252.1 linkuse as main transcript	c.1979C>T	p.Pro660Leu	missense_variant	36/58		XP_047299208.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris
COL5A2	ENST00000374866.9 linkuse as main transcript	c.2117C>T	p.Pro706Leu	missense_variant	32/54	1	NM_000393.5	ENSP00000364000	P1
COL5A2	ENST00000618828.1 linkuse as main transcript	c.956C>T	p.Pro319Leu	missense_variant	25/47	5		ENSP00000482184
COL5A2	ENST00000470524.2 linkuse as main transcript	n.223C>T		non_coding_transcript_exon_variant	5/8	5

Frequencies

GnomAD3 genomes

AF:

0.000158

AC:

AN:

151440

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000388

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000198

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000209

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000442

Gnomad OTH

AF:

0.000481

GnomAD3 exomes

AF:

0.000103

AC:

AN:

251230

Hom.:

AF XY:

0.0000810

AC XY:

AN XY:

135816

show subpopulations

Gnomad AFR exome

AF:

0.000739

Gnomad AMR exome

AF:

0.000116

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000131

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000440

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.0000369

AC:

AN:

1461522

Hom.:

Cov.:

AF XY:

0.0000371

AC XY:

AN XY:

727072

show subpopulations

Gnomad4 AFR exome

AF:

0.000657

Gnomad4 AMR exome

AF:

0.0000895

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000104

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000108

Gnomad4 OTH exome

AF:

0.000116

GnomAD4 genome

AF:

0.000158

AC:

AN:

151546

Hom.:

Cov.:

AF XY:

0.000203

AC XY:

AN XY:

74044

show subpopulations

Gnomad4 AFR

AF:

0.000387

Gnomad4 AMR

AF:

0.000197

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000209

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000442

Gnomad4 OTH

AF:

0.000476

Alfa

AF:

0.0000965

Hom.:

Bravo

AF:

0.000242

ESP6500AA

AF:

0.000681

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000115

AC:

EpiCase

AF:

0.0000546

EpiControl

AF:

0.00

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Feb 15, 2022	Has been reported in an individual with congenital heart defects, who also harbored variants in several other genes (Jin et al., 2017); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 28166811, 28991257, 27535533) -
Uncertain significance, no assertion criteria provided	clinical testing	Department of Pathology and Laboratory Medicine, Sinai Health System	-	The COL5A2 p.Pro706Leu variant was not identified in the literature nor was it identified in Cosmic or LOVD 3.0. The variant was identified in dbSNP (ID: rs146175905) and in ClinVar (classified as a VUS by Invitae and Clinical Molecular Genetics Laboratory, Johns Hopkins All Children's Hospital). The variant was also identified in control databases in 28 of 282454 chromosomes at a frequency of 0.000099 (Genome Aggregation Database Feb 27, 2017) and was observed in the following populations: African in 14 of 24910 chromosomes (freq: 0.000562), Other in 1 of 7210 chromosomes (freq: 0.000139), South Asian in 4 of 30594 chromosomes (freq: 0.000131), Latino in 4 of 35382 chromosomes (freq: 0.000113) and European (non-Finnish) in 5 of 129032 chromosomes (freq: 0.000039); it was not observed in the Ashkenazi Jewish, East Asian, and European (Finnish) populations. The variant occurs outside of the splicing consensus sequence and in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer) do not predict a difference in splicing. The p.Pro706 residue is conserved in mammals and computational analyses (PolyPhen-2, SIFT, AlignGVGD, BLOSUM, MutationTaster) provide inconsistent predictions regarding the impact to the protein; this information is not very predictive of pathogenicity. In summary, based on the above information the clinical significance of this variant cannot be determined with certainty at this time. This variant is classified as a variant of uncertain significance. -

Marfan syndrome

Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

Clinical Molecular Genetics Laboratory, Johns Hopkins All Children's Hospital

Dec 30, 2016

- -

Familial thoracic aortic aneurysm and aortic dissection

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 20, 2019

The p.P706L variant (also known as c.2117C>T), located in coding exon 32 of the COL5A2 gene, results from a C to T substitution at nucleotide position 2117. The proline at codon 706 is replaced by leucine, an amino acid with similar properties. This alteration was detected in an individual with unspecified conotruncal defects who also carried the COL5A2 p.R1070H alteration (Jin SC et al. Nat. Genet., 2017 Nov;49:1593-1601). This amino acid position is highly conserved in available 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 alteration remains unclear. -

Ehlers-Danlos syndrome, classic type, 1

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 26, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.068

BayesDel_addAF

Benign

-0.091

BayesDel_noAF

Uncertain

0.0

CADD

Uncertain

DANN

Uncertain

0.97

DEOGEN2

Benign

0.39

T;T;T

Eigen

Benign

0.12

Eigen_PC

Uncertain

0.28

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Benign

0.86

.;D;D

M_CAP

Uncertain

0.13

MetaRNN

Benign

0.11

T;T;T

MetaSVM

Pathogenic

0.85

MutationAssessor

Benign

0.65

N;.;N

MutationTaster

Benign

1.0

PrimateAI

Uncertain

0.72

PROVEAN

Uncertain

-3.5

D;.;.

REVEL

Uncertain

0.48

Sift

Benign

0.38

T;.;.

Sift4G

Benign

0.18

T;T;.

Polyphen

0.64

P;.;P

Vest4

0.59

MVP

0.60

MPC

0.26

ClinPred

0.045

GERP RS

5.6

Varity_R

0.20

gMVP

0.24

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