rs281874682

Variant names:

• chrX-108598805-C-T
• rs281874682
• NM_033380.3:c.1883C>T

Your query was ambiguous. Multiple possible variants found:

• chrX-108598805-C-T
• chrX-108598805-C-A

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM1 PM2 PP2 PP3

The NM_033380.3(COL4A5):​c.1883C>T​(p.Pro628Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 23)
• Consequence: COL4A5 NM_033380.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.94
• Publications: 8 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: G2P, ClinGen
• X-linked Alport syndrome

  Inheritance: XL Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, Genomics England PanelApp, Myriad Women’s Health

ACMG classification

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

• PM1: In a hotspot region, there are 12 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 4 benign, 5 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, 0.819

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_033380.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	COL4A5	NM_033380.3	MANE Select	c.1883C>T	p.Pro628Leu	missense	Exon 25 of 53	NP_203699.1	P29400-2
	COL4A5	NM_000495.5		c.1883C>T	p.Pro628Leu	missense	Exon 25 of 51	NP_000486.1	P29400-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	COL4A5	ENST00000328300.11	TSL:1 MANE Select	c.1883C>T	p.Pro628Leu	missense	Exon 25 of 53	ENSP00000331902.7	P29400-2
	COL4A5	ENST00000483338.1	TSL:1	c.707C>T	p.Pro236Leu	missense	Exon 9 of 20	ENSP00000495685.1	Q49AM6
	COL4A5	ENST00000949143.1		c.1883C>T	p.Pro628Leu	missense	Exon 25 of 51	ENSP00000619202.1

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 23

Alfa AF: 0.000131 Hom.: 0

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	X-linked Alport syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.067
BayesDel_addAF	Pathogenic	0.37	D
BayesDel_noAF	Pathogenic	0.30
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.89	D
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Benign	0.79	T
M_CAP	Pathogenic	0.74	D
MetaRNN	Pathogenic	0.82	D
MetaSVM	Pathogenic	0.85	D
MutationAssessor	Uncertain	2.8	M
PhyloP100		2.9
PrimateAI	Uncertain	0.51	T
PROVEAN	Pathogenic	-5.1	D
REVEL	Pathogenic	0.73
Sift	Benign	0.084	T
Sift4G	Uncertain	0.027	D
Polyphen		0.97	D
Vest4		0.77
MutPred		0.36		Loss of glycosylation at P628 (P = 0.0508)
MVP		0.95
MPC		0.31
ClinPred		0.98	D
GERP RS		5.9
Varity_R		0.38
gMVP		0.44
Mutation Taster		=30/70	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.14		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: rs281874682; hg19: chrX-107842035; COSMIC: COSV60372789;