Genetic Variant COL6A5:p.Leu251Val (chr3-130379501-T-G) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001278298.2(COL6A5):c.751T>G(p.Leu251Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000709 in 1,551,360 control chromosomes in the GnomAD database, with no homozygous occurrence. 13/18 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000036 ( 0 hom. )

Consequence

COL6A5
NM_001278298.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.27

Variant links:

Genes affected

COL6A5 (HGNC:26674): (collagen type VI alpha 5 chain) This gene encodes a member of the collagen superfamily of proteins. The encoded protein contains multiple von Willebrand factor A-like domains and may interact with the alpha 1 and alpha 2 chains of collagen VI to form the complete collagen VI trimer. Polymorphisms in this gene may be linked to dermal phenotypes, such as eczema. Alternative splicing results in multiple transcript variants. [provided by RefSeq, May 2013]

COL6A5 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COL6A5	NM_001278298.2 link	c.751T>G	p.Leu251Val	missense_variant	Exon 4 of 41	ENST00000373157.9	NP_001265227.1	A8TX70H0Y393
COL6A5	NM_153264.7 link	c.751T>G	p.Leu251Val	missense_variant	Exon 4 of 40		NP_694996.5	A8TX70-2
COL6A5	NR_022012.3 link	n.1089T>G		non_coding_transcript_exon_variant	Exon 4 of 42

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
COL6A5	ENST00000373157.9 link	c.751T>G	p.Leu251Val	missense_variant	Exon 4 of 41	2	NM_001278298.2	ENSP00000362250.5	H0Y393
COL6A5	ENST00000312481.11 link	n.751T>G		non_coding_transcript_exon_variant	Exon 4 of 42	1		ENSP00000309762.7	A8TX70-1
COL6A5	ENST00000512836.6 link	c.751T>G	p.Leu251Val	missense_variant	Exon 4 of 40	2		ENSP00000422898.2	A8TX70-2H0Y935

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152086

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000966

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000650

AC:

AN:

153764

Hom.:

AF XY:

0.00

AC XY:

AN XY:

81586

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000405

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000357

AC:

AN:

1399156

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

690096

show subpopulations

Gnomad4 AFR exome

AF:

0.000127

Gnomad4 AMR exome

AF:

0.0000280

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:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000394

AC:

AN:

152204

Hom.:

Cov.:

AF XY:

0.0000672

AC XY:

AN XY:

74438

show subpopulations

Gnomad4 AFR

AF:

0.000144

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:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000264

Asia WGS

AF:

0.000577

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jan 16, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.751T>G (p.L251V) alteration is located in exon 4 (coding exon 3) of the COL6A5 gene. This alteration results from a T to G substitution at nucleotide position 751, causing the leucine (L) at amino acid position 251 to be replaced by a valine (V). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Benign

-0.16

BayesDel_noAF

Benign

-0.35

CADD

Benign

DANN

Benign

0.95

DEOGEN2

Benign

0.12

Eigen

Benign

-0.72

Eigen_PC

Benign

-0.88

FATHMM_MKL

Benign

0.42

LIST_S2

Benign

0.65

M_CAP

Benign

0.057

MetaRNN

Uncertain

0.63

MetaSVM

Benign

-0.42

PrimateAI

Benign

0.34

PROVEAN

Benign

-1.7

REVEL

Uncertain

0.45

Sift

Benign

0.11

Sift4G

Benign

0.17

Vest4

0.21

MutPred

0.87

Gain of helix (P = 0.132);

MVP

0.34

MPC

0.13

ClinPred

0.13

GERP RS

-2.8

gMVP

0.17

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.050

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