Genetic Variant COL4A5:p.Gly1158Trp (chrX-108666513-G-T) – ACMG Classification: Pathogenic (11 pts)

Variant summary

Our verdict is Pathogenic. The variant received 11 ACMG points: 11P and 0B. PM1PM2PM5PP2PP3_Strong

The NM_033380.3(COL4A5):c.3472G>T(p.Gly1158Trp) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G1158E) has been classified as Likely pathogenic.

Frequency

Genomes: not found (cov: 23)

Exomes 𝑓: 0.0 ( 0 hom. 0 hem. )

Failed GnomAD Quality Control

Consequence

COL4A5
NM_033380.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 8.39

Publications

2 publications found

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 Gene-Disease associations (from GenCC):

Alport syndrome
Inheritance: XL Classification: DEFINITIVE Submitted by: ClinGen, G2P
X-linked Alport syndrome
Inheritance: XL Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: PanelApp Australia, Genomics England PanelApp, Myriad Women’s Health, Orphanet, Labcorp Genetics (formerly Invitae)

COL4A5 links:

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ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 11 ACMG points.

PM1

In a hotspot region, there are 8 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 6 uncertain in NM_033380.3

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chrX-108666514-G-A is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 870365.Status of the report is criteria_provided_single_submitter, 1 stars.

PP2

Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 538 curated pathogenic missense variants (we use a threshold of 10). The gene has 138 curated benign missense variants. Gene score misZ: 2.4995 (below the threshold of 3.09). Trascript score misZ: NaN (below the threshold of 3.09). GenCC associations: The gene is linked to X-linked Alport syndrome, Alport syndrome.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.994

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COL4A5	NM_033380.3 link	c.3472G>T	p.Gly1158Trp	missense_variant	Exon 39 of 53	ENST00000328300.11	NP_203699.1	P29400-2Q49AM6A7MBN3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
COL4A5	ENST00000328300.11 link	c.3472G>T	p.Gly1158Trp	missense_variant	Exon 39 of 53	1	NM_033380.3	ENSP00000331902.7		P29400-2
COL4A5	ENST00000361603.7 link	c.3472G>T	p.Gly1158Trp	missense_variant	Exon 39 of 51	2		ENSP00000354505.2		P29400-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Data not reliable, filtered out with message: AC0

AF:

0.00

AC:

AN:

1092683

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

358935

African (AFR)

AF:

0.00

AC:

AN:

26248

American (AMR)

AF:

0.00

AC:

AN:

34873

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19297

East Asian (EAS)

AF:

0.00

AC:

AN:

29983

South Asian (SAS)

AF:

0.00

AC:

AN:

53058

European-Finnish (FIN)

AF:

0.00

AC:

AN:

40177

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4129

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

839054

Other (OTH)

AF:

0.00

AC:

AN:

45864

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.90

BayesDel_addAF

Pathogenic

0.74

BayesDel_noAF

Pathogenic

0.82

CADD

Uncertain

(source)

DANN

Uncertain

0.98

DEOGEN2

Pathogenic

0.94

.;D

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.94

D;D

M_CAP

Pathogenic

0.98

MetaRNN

Pathogenic

0.99

D;D

MetaSVM

Pathogenic

0.97

MutationAssessor

Pathogenic

4.6

H;H

PhyloP100

8.4

PrimateAI

Uncertain

0.79

PROVEAN

Pathogenic

-7.4

D;D

REVEL

Pathogenic

0.99

Sift

Pathogenic

0.0

D;D

Sift4G

Pathogenic

0.0

D;D

Polyphen

1.0

.;D

Vest4

0.95

MutPred

1.0

Loss of relative solvent accessibility (P = 0.0676);Loss of relative solvent accessibility (P = 0.0676);

MVP

1.0

MPC

0.35

ClinPred

1.0

GERP RS

5.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.98

gMVP

1.0

Mutation Taster

=7/93

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over