rs116003670

Positions:

• chr9-134690996-G-A

Variant summary

Our verdict is Benign. Variant got -19 ACMG points: 1P and 20B. PP2 BP4_Strong BP6_Very_Strong BS1 BS2

The NM_000093.5(COL5A1):​c.194G>A​(p.Arg65Gln) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000289 in 1,613,810 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R65W) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.0015 (2 hom., cov: 33)
  • Exomes 𝑓: 0.00016 (0 hom.)
• Consequence: COL5A1 NM_000093.5 missense
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:9
• Conservation: PhyloP100: 9.53

Genes affected

COL5A1 (HGNC:2209): (collagen type V alpha 1 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. The encoded procollagen protein occurs commonly as the heterotrimer pro-alpha1(V)-pro-alpha1(V)-pro-alpha2(V). Mutations in this gene are associated with Ehlers-Danlos syndrome, types I and II. Alternative splicing of this gene results in multiple transcript variants. [provided by RefSeq, May 2013]

COL5A1 (HGNC:):

ACMG classification

Verdict is Benign. Variant got -19 ACMG points.

• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), COL5A1. . Gene score misZ 2.0682 (greater than the threshold 3.09). Trascript score misZ 4.1823 (greater than threshold 3.09). GenCC has associacion of gene with Ehlers-Danlos syndrome, classic type, 1, arterial disorder, Ehlers-Danlos syndrome, classic type.
• BP4: Computational evidence support a benign effect (MetaRNN=0.03138423).
• BP6: Variant 9-134690996-G-A is Benign according to our data. Variant chr9-134690996-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 213007.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00153 (233/152366) while in subpopulation AFR AF= 0.00498 (207/41584). AF 95% confidence interval is 0.00442. There are 2 homozygotes in gnomad4. There are 89 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.
• BS2: High AC in GnomAd4 at 233 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
COL5A1	NM_000093.5	c.194G>A	p.Arg65Gln	missense_variant	2/66	ENST00000371817.8	NP_000084.3
COL5A1	NM_001278074.1	c.194G>A	p.Arg65Gln	missense_variant	2/66		NP_001265003.1
COL5A1	XM_017014266.3	c.194G>A	p.Arg65Gln	missense_variant	2/65		XP_016869755.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
COL5A1	ENST00000371817.8	c.194G>A	p.Arg65Gln	missense_variant	2/66	1	NM_000093.5	ENSP00000360882.3
COL5A1	ENST00000371820.4	c.194G>A	p.Arg65Gln	missense_variant	2/66	2		ENSP00000360885.4
COL5A1	ENST00000464187.1	n.380G>A		non_coding_transcript_exon_variant	2/6	2

Frequencies

GnomAD3 genomes AF: 0.00152 AC: 232 AN: 152248 Hom.: 2 Cov.: 33

Gnomad AFR AF: 0.00497

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00105

Gnomad ASJ AF: 0.000576

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00287

GnomAD3 exomes AF: 0.000390 AC: 98 AN: 251152 Hom.: 0 AF XY: 0.000302 AC XY: 41 AN XY: 135852

Gnomad AFR exome AF: 0.00462

Gnomad AMR exome AF: 0.000260

Gnomad ASJ exome AF: 0.000696

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000980

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000264

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.000159 AC: 233 AN: 1461444 Hom.: 0 Cov.: 32 AF XY: 0.000139 AC XY: 101 AN XY: 727000

Gnomad4 AFR exome AF: 0.00445

Gnomad4 AMR exome AF: 0.000380

Gnomad4 ASJ exome AF: 0.000612

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000464

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000189

Gnomad4 OTH exome AF: 0.000397

GnomAD4 genome AF: 0.00153 AC: 233 AN: 152366 Hom.: 2 Cov.: 33 AF XY: 0.00119 AC XY: 89 AN XY: 74504

Gnomad4 AFR AF: 0.00498

Gnomad4 AMR AF: 0.00105

Gnomad4 ASJ AF: 0.000576

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000207

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000147

Gnomad4 OTH AF: 0.00284

Alfa AF: 0.000323 Hom.: 1

Bravo AF: 0.00164

ESP6500AA AF: 0.00477 AC: 21

ESP6500EA AF: 0.000116 AC: 1

ExAC AF: 0.000535 AC: 65

EpiCase AF: 0.000109

EpiControl AF: 0.00

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:9

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:2

Likely benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Nov 22, 2015	- -
Likely benign, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Apr 08, 2024	- -

Ehlers-Danlos syndrome, classic type, 1 Benign:2

Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 19, 2024	- -
Benign, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Mar 15, 2022	- -

COL5A1-related disorder Benign:1

Benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Apr 25, 2019

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Fibromuscular dysplasia, multifocal Benign:1

Benign, criteria provided, single submitter

clinical testing

Genome-Nilou Lab

Mar 15, 2022

- -

Familial thoracic aortic aneurysm and aortic dissection Benign:1

Benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 22, 2015

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

not provided Benign:1

Likely benign, criteria provided, single submitter

clinical testing

GeneDx

Apr 21, 2021

This variant is associated with the following publications: (PMID: 28346524) -

Ehlers-Danlos syndrome, classic type Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.30
BayesDel_addAF	Benign	-0.27	T
BayesDel_noAF	Benign	-0.17
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Benign	0.17	T;.
Eigen	Uncertain	0.58
Eigen_PC	Uncertain	0.40
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.96	D;D
M_CAP	Benign	0.056	D
MetaRNN	Benign	0.031	T;T
MetaSVM	Uncertain	-0.0096	T
MutationAssessor	Uncertain	2.7	M;M
PrimateAI	Uncertain	0.51	T
PROVEAN	Benign	-1.9	N;.
REVEL	Uncertain	0.34
Sift	Benign	0.056	T;.
Sift4G	Benign	0.18	T;T
Polyphen		1.0	D;.
Vest4		0.80
MVP		0.58
MPC		0.69
ClinPred		0.052	T
GERP RS		4.7
Varity_R		0.13
gMVP		0.54

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

Other links and lift over

dbSNP: rs116003670; hg19: chr9-137582842;