Variant chrX-108440099-T-TGAAGGAGCTGCGGGAGCC details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP6BS2

The NM_033380.3(COL4A5):c.-25_-8dup variant causes a 5 prime UTR change. The variant allele was found at a frequency of 0.000124 in 1,171,627 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 30 hemizygotes in GnomAD. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00078 ( 0 hom., 13 hem., cov: 21)

Exomes 𝑓: 0.000056 ( 0 hom. 17 hem. )

Consequence

COL4A5
NM_033380.3 5_prime_UTR

Scores

Not classified

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3B:2

Conservation

PhyloP100: 4.04

Variant links:

Genes affected

COL4A5 (HGNC:2207): (collagen type IV alpha 5 chain) This gene encodes one of the six subunits of type IV collagen, the major structural component of basement membranes. Mutations in this gene are associated with X-linked Alport syndrome, also known as hereditary nephritis. 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 so that each gene pair shares a common promoter. Alternatively spliced transcript variants have been identified for this gene. [provided by RefSeq, Aug 2010]

COL4A5 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -5 ACMG points.

BP6

Variant X-108440099-T-TGAAGGAGCTGCGGGAGCC is Benign according to our data. Variant chrX-108440099-T-TGAAGGAGCTGCGGGAGCC is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 451163.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Uncertain_significance=2}.

BS2

High Hemizygotes in GnomAd4 at 13 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	Effect	#exon/exons	MANE
COL4A5	NM_033380.3 linkuse as main transcript	c.-25_-8dup	5_prime_UTR_variant	1/53	ENST00000328300.11
COL4A5	NM_000495.5 linkuse as main transcript	c.-25_-8dup	5_prime_UTR_variant	1/51
COL4A5	XM_047441810.1 linkuse as main transcript	c.-401_-384dup	5_prime_UTR_variant	1/54
COL4A5	XM_047441811.1 linkuse as main transcript	c.-25_-8dup	5_prime_UTR_variant	1/42

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
COL4A5	ENST00000328300.11 linkuse as main transcript	c.-25_-8dup		5_prime_UTR_variant	1/53	1	NM_033380.3		P29400-2

Frequencies

GnomAD3 genomes

AF:

0.000777

AC:

AN:

109462

Hom.:

Cov.:

AF XY:

0.000410

AC XY:

AN XY:

31732

show subpopulations

Gnomad AFR

AF:

0.00263

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000294

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:

0.0000190

Gnomad OTH

AF:

0.00137

GnomAD3 exomes

AF:

0.000184

AC:

AN:

173882

Hom.:

AF XY:

0.0000338

AC XY:

AN XY:

59208

show subpopulations

Gnomad AFR exome

AF:

0.00239

Gnomad AMR exome

AF:

0.0000373

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:

0.0000130

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000565

AC:

AN:

1062107

Hom.:

Cov.:

AF XY:

0.0000509

AC XY:

AN XY:

333883

show subpopulations

Gnomad4 AFR exome

AF:

0.00218

Gnomad4 AMR exome

AF:

0.0000573

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:

0.00000123

Gnomad4 OTH exome

AF:

0.0000222

GnomAD4 genome

AF:

0.000776

AC:

AN:

109520

Hom.:

Cov.:

AF XY:

0.000409

AC XY:

AN XY:

31800

show subpopulations

Gnomad4 AFR

AF:

0.00262

Gnomad4 AMR

AF:

0.000293

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000190

Gnomad4 OTH

AF:

0.00135

Alfa

AF:

0.000288

Hom.:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:3Benign:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1Benign:1

Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Sep 01, 2022	COL4A5: BS2 -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Aug 01, 2017	This individual is also heterozygous for the c.-25_-8dup18 variant. It has not been published as a pathogenic variant, nor has it been reported as a benign variant to our knowledge. The variant is not observed in large population cohorts (Lek et al., 2016; 1000 Genomes Consortium et al., 2015; Exome Variant Server). This regulatory duplication affects both nonconserved nucleotides and nucleotides conserved through mammals. No regulatory variants have been reported in the Human Gene Mutation Database or observed at GeneDx (Stenson et al., 2014). Therefore, based on the currently available information, it is unclear whether this variant is a pathogenic variant or a rare benign variant. -

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Dec 08, 2023

Variant summary: COL4A5 c.-25_-8dup18 is located in the untranslated mRNA region upstream of the initiation codon. The variant allele was found at a frequency of 0.00018 in 173882 control chromosomes. This frequency is not significantly higher than estimated for a pathogenic variant in COL4A5 causing Alport Syndrome 1, X-Linked Recessive (0.00018 vs 0.0046), allowing no conclusion about variant significance. To our knowledge, no occurrence of c.-25_-8dup18 in individuals affected with Alport Syndrome 1, X-Linked Recessive and no experimental evidence demonstrating its impact on protein function have been reported. Three submitters have cited clinical-significance assessments for this variant to ClinVar after 2014. Two submitters classified the variant as VUS while one classified as likely benign. Based on the evidence outlined above, the variant was classified as uncertain significance. -

X-linked Alport syndrome

Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

Natera, Inc.

Sep 16, 2020

- -

COL4A5-related disorder

Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Jul 03, 2020

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

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

Splicing

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