Variant X-108159494-G-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 1P and 4B. PP3BS2

The NM_033641.4(COL4A6):c.4780C>T(p.Arg1594Cys) variant causes a missense change. The variant allele was found at a frequency of 0.0000118 in 1,098,177 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 4 hemizygotes in GnomAD. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 24)

Exomes 𝑓: 0.000012 ( 0 hom. 4 hem. )

Consequence

COL4A6
NM_033641.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.70

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 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.748

BS2

High Hemizygotes in GnomAdExome4 at 4 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
COL4A6	NM_033641.4 linkuse as main transcript	c.4780C>T	p.Arg1594Cys	missense_variant	44/45	ENST00000334504.12

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
COL4A6	ENST00000334504.12 linkuse as main transcript	c.4780C>T	p.Arg1594Cys	missense_variant	44/45	5	NM_033641.4	P4	Q14031-2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000219

AC:

AN:

182525

Hom.:

AF XY:

0.00

AC XY:

AN XY:

67239

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000289

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:

0.0000118

AC:

AN:

1098177

Hom.:

Cov.:

AF XY:

0.0000110

AC XY:

AN XY:

363533

show subpopulations

Gnomad4 AFR exome

AF:

0.0000379

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000132

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000247

Gnomad4 NFE exome

AF:

0.00000831

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000756

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 17, 2023

The c.4783C>T (p.R1595C) alteration is located in exon 44 (coding exon 44) of the COL4A6 gene. This alteration results from a C to T substitution at nucleotide position 4783, causing the arginine (R) at amino acid position 1595 to be replaced by a cysteine (C). 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

0.22

BayesDel_addAF

Uncertain

0.088

BayesDel_noAF

Pathogenic

0.19

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.77

.;D;.;.;D;D

FATHMM_MKL

Uncertain

0.96

LIST_S2

Pathogenic

0.98

D;D;D;D;D;D

M_CAP

Pathogenic

0.48

MetaRNN

Pathogenic

0.75

D;D;D;D;D;D

MetaSVM

Pathogenic

0.97

MutationAssessor

Pathogenic

3.0

.;M;.;.;.;.

MutationTaster

Benign

1.0

D;D;D;D;D;D

PrimateAI

Benign

0.34

PROVEAN

Pathogenic

-6.2

D;D;.;D;.;.

REVEL

Pathogenic

0.68

Sift

Pathogenic

0.0

D;D;.;D;.;.

Sift4G

Uncertain

0.0020

D;D;D;D;D;D

Polyphen

1.0

D;D;.;D;.;.

Vest4

0.51

MutPred

0.72

.;Gain of catalytic residue at W1594 (P = 0.1145);.;.;.;.;

MVP

0.91

MPC

0.83

ClinPred

0.81

GERP RS

4.9

Varity_R

0.60

gMVP

0.72

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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