NM_033380.3:c.3632G>A

Variant names:

• chrX-108668346-G-A
• rs104886247
• NM_033380.3:c.3632G>A

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PM1 PM2 PP2 PP3_Strong PP5

The NM_033380.3(COL4A5):​c.3632G>A​(p.Gly1211Glu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000911 in 1,097,559 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency:
  • Genomes: not found (cov: 23)
  • Exomes 𝑓: 9.1e-7 (0 hom. 0 hem.)
• Consequence: COL4A5 NM_033380.3 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 9.46
• Publications: 4 publications found

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)

ACMG classification

Our verdict: Pathogenic. The variant received 10 ACMG points.

• PM1: In a hotspot region, there are 7 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 3 uncertain in NM_033380.3
• PM2: Very rare variant in population databases, with high coverage
• 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, 0.996
• PP5: Variant X-108668346-G-A is Pathogenic according to our data. Variant chrX-108668346-G-A is described in ClinVar as Pathogenic. ClinVar VariationId is 24662.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COL4A5	NM_033380.3	c.3632G>A	p.Gly1211Glu	missense_variant	Exon 41 of 53	ENST00000328300.11	NP_203699.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
COL4A5	ENST00000328300.11	c.3632G>A	p.Gly1211Glu	missense_variant	Exon 41 of 53	1	NM_033380.3	ENSP00000331902.7
COL4A5	ENST00000361603.7	c.3632G>A	p.Gly1211Glu	missense_variant	Exon 41 of 51	2		ENSP00000354505.2

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome AF: 9.11e-7 AC: 1 AN: 1097559 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 363087

African (AFR) AF: 0.00 AC: 0 AN: 26384

American (AMR) AF: 0.00 AC: 0 AN: 35205

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19385

East Asian (EAS) AF: 0.00 AC: 0 AN: 30192

South Asian (SAS) AF: 0.00 AC: 0 AN: 54102

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 40524

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 3846

European-Non Finnish (NFE) AF: 0.00000119 AC: 1 AN: 841869

Other (OTH) AF: 0.00 AC: 0 AN: 46052

GnomAD4 genome Cov.: 23

Alfa AF: 0.00 Hom.: 0

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Alport syndrome Pathogenic:1

Nov 09, 2014

Sydney Genome Diagnostics, Children's Hospital Westmead

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

This patient is heterozygous for the c.3632G>A p.(Gly1211Glu) variant in the COL4A5 gene. This variant has been previously reported as part of a complex allele, in a patient with Alport syndrome (Knebelmann et al., 1996, Am. J. Hum. Genet. 59:1221-1232 - PMID 1914854). In silico analysis (Alamut Visual v2.6) using PolyPhen2, SIFT and Mutation Taster all predict this variant to be likely pathogenic, however, Align GVGD predicts this variant to be benign. This variant lies in the collagen triple helix repeat domain and mutations involving glycine residues have been implicated in Alport's syndrome. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.94
BayesDel_addAF	Pathogenic	0.74	D
BayesDel_noAF	Pathogenic	0.82
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.93	.;D
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.97	D;D
M_CAP	Pathogenic	0.98	D
MetaRNN	Pathogenic	1.0	D;D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Pathogenic	4.6	H;H
PhyloP100		9.5
PrimateAI	Pathogenic	0.86	D
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		1.0
MutPred		1.0		Gain of catalytic residue at G1211 (P = 0.2277);Gain of catalytic residue at G1211 (P = 0.2277);
MVP		1.0
MPC		0.39
ClinPred		1.0	D
GERP RS		6.0
Varity_R		0.99
gMVP		1.0
Mutation Taster		=0/100	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs104886247; hg19: chrX-107911576; COSMIC: COSV60361893; COSMIC: COSV60361893;