2-189065000-T-C

Position:

• chr2-189065000-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3 PP5

The NM_000393.5(COL5A2):​c.1617+4A>G variant causes a splice donor region, intron change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 32)
• Consequence: COL5A2 NM_000393.5 splice_donor_region, intron
• Scores: Splicing: ADA: 0.9883
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 4.07

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 Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: dbscSNV1_ADA, max_spliceai. No scorers claiming Uncertain. Scorers claiming Benign: dbscSNV1_RF.
• PP5: Variant 2-189065000-T-C is Pathogenic according to our data. Variant chr2-189065000-T-C is described in ClinVar as [Pathogenic]. Clinvar id is 518428.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
COL5A2	NM_000393.5	c.1617+4A>G		splice_donor_region_variant, intron_variant		ENST00000374866.9	NP_000384.2
COL5A2	XM_011510573.4	c.1479+4A>G		splice_donor_region_variant, intron_variant			XP_011508875.1
COL5A2	XM_047443251.1	c.1479+4A>G		splice_donor_region_variant, intron_variant			XP_047299207.1
COL5A2	XM_047443252.1	c.1479+4A>G		splice_donor_region_variant, intron_variant			XP_047299208.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
COL5A2	ENST00000374866.9	c.1617+4A>G		splice_donor_region_variant, intron_variant		1	NM_000393.5	ENSP00000364000	P1
COL5A2	ENST00000618828.1	c.456+4A>G		splice_donor_region_variant, intron_variant		5		ENSP00000482184

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Ehlers-Danlos syndrome, classic type Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Apr 05, 2018

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.33
CADD	Benign	17
DANN	Benign	0.94

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	0.99
dbscSNV1_RF	Benign	0.70
SpliceAI score (max)		0.63		Details are displayed if max score is > 0.2
DS_DL_spliceai		0.63		Position offset: 4

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs1553515517; hg19: chr2-189929726;