rs755666206

Variant names:

• chr2-189092303-A-G
• rs755666206
• NM_000393.5:c.567+7T>C

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BS1 BS2

The NM_000393.5(COL5A2):​c.567+7T>C variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000155 in 1,418,052 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.000016 (2 hom.)
• Consequence: COL5A2 NM_000393.5 splice_region, intron
• Scores: Splicing: ADA: 0.00002698
• Clinical Significance: Likely benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: 1.29
• Publications: 0 publications found

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

ACMG classification

Our verdict: Benign. The variant received -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.53).
• BP6: Variant 2-189092303-A-G is Benign according to our data. Variant chr2-189092303-A-G is described in ClinVar as Likely_benign. ClinVar VariationId is 459753.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BS1: Variant frequency is greater than expected in population mid. GnomAdExome4 allele frequency = 0.0000155 (22/1418052) while in subpopulation MID AF = 0.00282 (16/5676). AF 95% confidence interval is 0.00177. There are 2 homozygotes in GnomAdExome4. There are 14 alleles in the male GnomAdExome4 subpopulation. Median coverage is 26. This position passed quality control check.
• BS2: High AC in GnomAdExome4 at 22 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000393.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	COL5A2	NM_000393.5	MANE Select	c.567+7T>C		splice_region intron	N/A	NP_000384.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	COL5A2	ENST00000374866.9	TSL:1 MANE Select	c.567+7T>C		splice_region intron	N/A	ENSP00000364000.3
	COL5A2	ENST00000618828.1	TSL:5	c.-64+7T>C		splice_region intron	N/A	ENSP00000482184.1
	COL5A2	ENST00000649966.1		c.429+7T>C		splice_region intron	N/A	ENSP00000496785.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.0000392 AC: 9 AN: 229806 AF XY: 0.0000243

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000293

Gnomad OTH exome AF: 0.000707

GnomAD4 exome AF: 0.0000155 AC: 22 AN: 1418052 Hom.: 2 Cov.: 26 AF XY: 0.0000198 AC XY: 14 AN XY: 706132

African (AFR) AF: 0.00 AC: 0 AN: 32612

American (AMR) AF: 0.00 AC: 0 AN: 43326

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25592

East Asian (EAS) AF: 0.00 AC: 0 AN: 39202

South Asian (SAS) AF: 0.0000241 AC: 2 AN: 83074

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52660

Middle Eastern (MID) AF: 0.00282 AC: 16 AN: 5676

European-Non Finnish (NFE) AF: 9.28e-7 AC: 1 AN: 1077076

Other (OTH) AF: 0.0000510 AC: 3 AN: 58834

GnomAD4 genome Cov.: 32

Alfa AF: 0.000356 Hom.: 0

Bravo AF: 0.00000756

ClinVar

ClinVar submissions as Germline

Significance: Likely benign

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	-	1	Ehlers-Danlos syndrome, classic type, 1 (1)
-	-	1	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.53
CADD	Benign	6.8
DANN	Benign	0.77
PhyloP100		1.3

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.000027
dbscSNV1_RF	Benign	0.0
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

Other links and lift over

dbSNP: rs755666206; hg19: chr2-189957029;