9-134812672-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PP2PP3BS2

The NM_000093.5(COL5A1):c.3812C>T(p.Pro1271Leu) variant causes a missense change. The variant allele was found at a frequency of 0.0000301 in 1,593,286 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P1271R) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000032 ( 0 hom. )

Consequence

COL5A1
NM_000093.5 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:5B:1

Conservation

PhyloP100: 4.95

Variant links:

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PP2

Missense variant where missense usually causes diseases, COL5A1

PP3

MetaRNN computational evidence supports a deleterious effect, 0.775

BS2

High AC in GnomAdExome at 6 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
COL5A1	NM_000093.5 linkuse as main transcript	c.3812C>T	p.Pro1271Leu	missense_variant	48/66	ENST00000371817.8
COL5A1	NM_001278074.1 linkuse as main transcript	c.3812C>T	p.Pro1271Leu	missense_variant	48/66
COL5A1	XM_017014266.3 linkuse as main transcript	c.3812C>T	p.Pro1271Leu	missense_variant	48/65

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
COL5A1	ENST00000371817.8 linkuse as main transcript	c.3812C>T	p.Pro1271Leu	missense_variant	48/66	1	NM_000093.5	P4	P20908-1
COL5A1	ENST00000371820.4 linkuse as main transcript	c.3812C>T	p.Pro1271Leu	missense_variant	48/66	2		A2	P20908-2

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152134

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000284

AC:

AN:

211100

Hom.:

AF XY:

0.0000353

AC XY:

AN XY:

113454

show subpopulations

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 SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000431

Gnomad OTH exome

AF:

0.000372

GnomAD4 exome

AF:

0.0000319

AC:

AN:

1441152

Hom.:

Cov.:

AF XY:

0.0000406

AC XY:

AN XY:

714612

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000363

Gnomad4 OTH exome

AF:

0.000100

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152134

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74318

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000761

Hom.:

Bravo

AF:

0.0000264

ExAC

AF:

0.00000828

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:5Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:3

Uncertain significance, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Apr 21, 2022	The COL5A1 c.3812C>T; p.Pro1271Leu variant (rs771146636), to our knowledge, is not reported in the literature in an individual with Ehlers-Danlos syndrome, but is listed in the ClinVar database (Variation ID: 459682). This variant is found in the general population with an overall allele frequency of 0.0028% (6/211,100 alleles) in the Genome Aggregation Database. The proline at codon 1271 is highly conserved but computational analyses are uncertain whether this variant is neutral or deleterious (REVEL: 0.571). Due to limited information, the clinical significance of the p.Pro1271Leu variant is uncertain at this time. -
Uncertain significance, criteria provided, single submitter	clinical testing	Mayo Clinic Laboratories, Mayo Clinic	May 12, 2020	- -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Oct 30, 2022	Reported as a variant of uncertain significance in an individual with a platelet function disorder (Downes et al., 2019).; In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Occurs in the triple helical domain at the X position in the canonical Gly-X-Y repeat; although this variant may have an effect on normal protein folding and function, missense substitution at the X position is not a common mechanism of disease (Symoens et al., 2012; HGMD); This variant is associated with the following publications: (PMID: 31064749) -

Familial thoracic aortic aneurysm and aortic dissection

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 25, 2023

The p.P1271L variant (also known as c.3812C>T), located in coding exon 48 of the COL5A1 gene, results from a C to T substitution at nucleotide position 3812. The proline at codon 1271 is replaced by leucine, an amino acid with similar properties. The alteration was reported in a cohort of subjects with bleeding disorders (Downes K et al. Blood, 2019 Dec;134:2082-2091). This amino acid position is highly conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Abnormal bleeding

Uncertain:1

Uncertain significance, criteria provided, single submitter

research

NIHR Bioresource Rare Diseases, University of Cambridge

Feb 01, 2019

- -

Ehlers-Danlos syndrome, classic type, 1

Benign:1

Benign, criteria provided, single submitter

clinical testing

Invitae

Jan 16, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.095

BayesDel_addAF

Uncertain

0.014

BayesDel_noAF

Benign

-0.12

Cadd

Benign

Dann

Benign

0.89

DEOGEN2

Uncertain

0.68

D;.

Eigen

Uncertain

0.35

Eigen_PC

Uncertain

0.28

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.91

D;D

M_CAP

Uncertain

0.19

MetaRNN

Pathogenic

0.77

D;D

MetaSVM

Uncertain

0.33

MutationAssessor

Benign

0.81

L;L

MutationTaster

Benign

1.0

PrimateAI

Pathogenic

0.82

PROVEAN

Uncertain

-4.2

D;.

REVEL

Uncertain

0.57

Sift

Benign

0.20

T;.

Sift4G

Benign

0.19

T;T

Polyphen

1.0

D;.

Vest4

0.61

MVP

0.62

MPC

0.30

ClinPred

0.48

GERP RS

4.8

Varity_R

0.18

gMVP

0.47

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over