chr2-189045226-G-C

Variant names:

• chr2-189045226-G-C
• rs146789395
• NM_000393.5:c.3316C>G

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_000393.5(COL5A2):​c.3316C>G​(p.Arg1106Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000688 in 1,453,820 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R1106W) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: COL5A2 NM_000393.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.29
• Publications: 2 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: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

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.3316C>G	p.Arg1106Gly	missense	Exon 47 of 54	NP_000384.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	COL5A2	ENST00000374866.9	TSL:1 MANE Select	c.3316C>G	p.Arg1106Gly	missense	Exon 47 of 54	ENSP00000364000.3
	COL5A2	ENST00000618828.1	TSL:5	c.2155C>G	p.Arg719Gly	missense	Exon 40 of 47	ENSP00000482184.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000405 AC: 1 AN: 246710 AF XY: 0.00000747

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: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 6.88e-7 AC: 1 AN: 1453820 Hom.: 0 Cov.: 29 AF XY: 0.00000138 AC XY: 1 AN XY: 723406

African (AFR) AF: 0.00 AC: 0 AN: 33018

American (AMR) AF: 0.00 AC: 0 AN: 43594

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25818

East Asian (EAS) AF: 0.00 AC: 0 AN: 39514

South Asian (SAS) AF: 0.0000117 AC: 1 AN: 85272

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53230

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5706

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1107710

Other (OTH) AF: 0.00 AC: 0 AN: 59958

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000824 AC: 1

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.35
BayesDel_addAF	Uncertain	0.070	D
BayesDel_noAF	Uncertain	-0.040
CADD	Benign	23
DANN	Uncertain	0.98
DEOGEN2	Benign	0.29	T
Eigen	Uncertain	0.30
Eigen_PC	Uncertain	0.42
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Uncertain	0.89	D
M_CAP	Uncertain	0.086	D
MetaRNN	Uncertain	0.48	T
MetaSVM	Uncertain	0.51	D
MutationAssessor	Benign	1.2	L
PhyloP100		3.3
PrimateAI	Uncertain	0.57	T
PROVEAN	Benign	-1.7	N
REVEL	Uncertain	0.47
Sift	Benign	0.24	T
Sift4G	Benign	0.42	T
Polyphen		0.68	P
Vest4		0.59
MutPred		0.48		Loss of methylation at R1106 (P = 0.0156)
MVP		0.70
MPC		0.33
ClinPred		0.34	T
GERP RS		6.0
Varity_R		0.21
gMVP		0.52
Mutation Taster		=54/46	polymorphism

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

Other links and lift over

dbSNP: rs146789395; hg19: chr2-189909952;