Genetic Variant COL4A6:p.Ter1691Gluext*? (chrX-108157002-A-C) – ACMG Classification: Likely_pathogenic (6 pts)

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2PM4PP5_Moderate

The NM_033641.4(COL4A6):c.5071T>G(p.Ter1691Gluext*?) variant causes a stop lost change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★).

Frequency

Genomes: not found (cov: 23)

Exomes 𝑓: 0.0000073 ( 0 hom. 6 hem. )

Failed GnomAD Quality Control

Consequence

COL4A6
NM_033641.4 stop_lost

Scores

Clinical Significance

Likely pathogenic criteria provided, single submitter P:1B:1

Conservation

PhyloP100: 9.13

Publications

1 publications found

Variant links:

Genes affected

COL4A6 (HGNC:2208): (collagen type IV alpha 6 chain) This gene encodes one of the six subunits of type IV collagen, the major structural component of basement membranes. Like the other members of the type IV collagen gene family, this gene is organized in a head-to-head conformation with another type IV collagen gene, alpha 5 type IV collagen, so that the gene pair shares a common promoter. Deletions in the alpha 5 gene that extend into the alpha 6 gene result in diffuse leiomyomatosis accompanying the X-linked Alport syndrome caused by the deletion in the alpha 5 gene. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Dec 2013]

COL4A6 Gene-Disease associations (from GenCC):

hearing loss, X-linked 6
Inheritance: XL Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, ClinGen
X-linked nonsyndromic hearing loss
Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet
premature ovarian failure 1
Inheritance: XL Classification: LIMITED Submitted by: Ambry Genetics

COL4A6 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PM4

Stoplost variant in NM_033641.4 Downstream stopcodon found after 2 codons.

PP5

Variant X-108157002-A-C is Pathogenic according to our data. Variant chrX-108157002-A-C is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 191253.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_033641.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
COL4A6	NM_033641.4	MANE Select	c.5071T>G	p.Ter1691Gluext*?	stop_lost	Exon 45 of 45	NP_378667.1	Q14031-2
COL4A6	NM_001287758.2		c.5122T>G	p.Ter1708Gluext*?	stop_lost	Exon 46 of 46	NP_001274687.1	A8MXH5
COL4A6	NM_001847.4		c.5074T>G	p.Ter1692Gluext*?	stop_lost	Exon 45 of 45	NP_001838.2	Q14031-1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
COL4A6	ENST00000334504.12	TSL:5 MANE Select	c.5071T>G	p.Ter1691Gluext*?	stop_lost	Exon 45 of 45	ENSP00000334733.7	Q14031-2
COL4A6	ENST00000372216.8	TSL:1	c.5074T>G	p.Ter1692Gluext*?	stop_lost	Exon 45 of 45	ENSP00000361290.4	Q14031-1
COL4A6	ENST00000621266.4	TSL:1	c.4999T>G	p.Ter1667Gluext*?	stop_lost	Exon 44 of 44	ENSP00000482970.1	A0A087WZY5

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.0000286

AC:

AN:

174709

AF XY:

0.0000493

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 FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

Data not reliable, filtered out with message: AS_VQSR

AF:

0.00000732

AC:

AN:

1092158

Hom.:

Cov.:

AF XY:

0.0000167

AC XY:

AN XY:

358936

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

26361

American (AMR)

AF:

0.00

AC:

AN:

34931

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

18887

East Asian (EAS)

AF:

0.00

AC:

AN:

30199

South Asian (SAS)

AF:

0.000152

AC:

AN:

52724

European-Finnish (FIN)

AF:

0.00

AC:

AN:

40126

Middle Eastern (MID)

AF:

0.00

AC:

AN:

3825

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

839236

Other (OTH)

AF:

0.00

AC:

AN:

45869

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

ExAC

AF:

0.000124

AC:

ClinVar

ClinVar submissions

Significance:Likely pathogenic

Revision:criteria provided, single submitter

View on ClinVar

Pathogenic

VUS

Benign

Condition

COL4A6-related disorder (1)

not provided (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Benign

-0.066

BayesDel_noAF

Benign

-0.33

CADD

Benign

(source)

DANN

Benign

0.72

FATHMM_MKL

Pathogenic

1.0

PhyloP100

9.1

Vest4

0.40

GERP RS

4.2

Mutation Taster

=193/7

disease causing (ClinVar)

(source)

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over