2-189002999-G-C

Variant names:

• chr2-189002999-G-C
• rs777361888
• NM_000090.4:c.2490G>C

Variant summary

Our verdict is Benign. The variant received -13 ACMG points: 0P and 13B. BP4_Strong BP6_Very_Strong BP7

The NM_000090.4(COL3A1):​c.2490G>C​(p.Pro830Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000464 in 1,551,640 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 Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. P830P) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.000026 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000049 (0 hom.)
• Consequence: COL3A1 NM_000090.4 synonymous
• Clinical Significance: Likely benign criteria provided, multiple submitters, no conflicts B:6
• Conservation: PhyloP100: -0.108
• Publications: 1 publications found

Genes affected

COL3A1 (HGNC:2201): (collagen type III alpha 1 chain) This gene encodes the pro-alpha1 chains of type III collagen, a fibrillar collagen that is found in extensible connective tissues such as skin, lung, uterus, intestine and the vascular system, frequently in association with type I collagen. Mutations in this gene are associated with Ehlers-Danlos syndrome type IV, and with aortic and arterial aneurysms. [provided by R. Dalgleish, Feb 2008]

COL3A1 Gene-Disease associations (from GenCC):

• autosomal dominant Ehlers-Danlos syndrome, vascular type

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, PanelApp Australia, Labcorp Genetics (formerly Invitae), Laboratory for Molecular Medicine, Genomics England PanelApp
• Ehlers-Danlos syndrome, vascular type

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
• polymicrogyria with or without vascular-type Ehlers-Danlos syndrome

  Inheritance: AR Classification: STRONG Submitted by: PanelApp Australia, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Benign. The variant received -13 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.66).
• BP6: Variant 2-189002999-G-C is Benign according to our data. Variant chr2-189002999-G-C is described in ClinVar as Likely_benign. ClinVar VariationId is 381742.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=-0.108 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000090.4. 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
	COL3A1	NM_000090.4	MANE Select	c.2490G>C	p.Pro830Pro	synonymous	Exon 36 of 51	NP_000081.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	COL3A1	ENST00000304636.9	TSL:1 MANE Select	c.2490G>C	p.Pro830Pro	synonymous	Exon 36 of 51	ENSP00000304408.4
	COL3A1	ENST00000450867.2	TSL:1	c.2391G>C	p.Pro797Pro	synonymous	Exon 35 of 50	ENSP00000415346.2
	COL3A1	ENST00000879201.1		c.2481G>C	p.Pro827Pro	synonymous	Exon 36 of 51	ENSP00000549260.1

Frequencies

GnomAD3 genomes AF: 0.0000263 AC: 4 AN: 152126 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000655

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000294

Gnomad OTH AF: 0.000478

GnomAD2 exomes AF: 0.0000128 AC: 2 AN: 156658 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: 0.0000330

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000486 AC: 68 AN: 1399514 Hom.: 0 Cov.: 31 AF XY: 0.0000493 AC XY: 34 AN XY: 690270

African (AFR) AF: 0.00 AC: 0 AN: 31616

American (AMR) AF: 0.00 AC: 0 AN: 35712

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25182

East Asian (EAS) AF: 0.00 AC: 0 AN: 35750

South Asian (SAS) AF: 0.00 AC: 0 AN: 79242

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 49272

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5698

European-Non Finnish (NFE) AF: 0.0000621 AC: 67 AN: 1079030

Other (OTH) AF: 0.0000172 AC: 1 AN: 58012

GnomAD4 genome AF: 0.0000263 AC: 4 AN: 152126 Hom.: 0 Cov.: 32 AF XY: 0.0000269 AC XY: 2 AN XY: 74306

African (AFR) AF: 0.00 AC: 0 AN: 41418

American (AMR) AF: 0.0000655 AC: 1 AN: 15268

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5180

South Asian (SAS) AF: 0.00 AC: 0 AN: 4828

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10618

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000294 AC: 2 AN: 68028

Other (OTH) AF: 0.000478 AC: 1 AN: 2090

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000302

ClinVar

ClinVar submissions as Germline

Significance: Likely benign

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	-	2	Ehlers-Danlos syndrome, type 4 (2)
-	-	2	Familial thoracic aortic aneurysm and aortic dissection (2)
-	-	2	not provided (2)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.66
CADD	Benign	2.5
DANN	Benign	0.43
PhyloP100		-0.11
Mutation Taster		=98/2	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs777361888; hg19: chr2-189867725;