rs104886193

chrX-108621871-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM1 PM2 PP5

The NM_033380.3(COL4A5):c.2746A>G(p.Ser916Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in Lovd as Pathogenic (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S916N) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 23)
• Consequence: COL4A5 NM_033380.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.39

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 5 ACMG points.

• PM1: In a hotspot region, there are 5 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 1 uncertain in NM_033380.3
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant X-108621871-A-G is Pathogenic according to our data. Variant chrX-108621871-A-G is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
COL4A5	NM_033380.3	c.2746A>G	p.Ser916Gly	missense_variant	32/53	ENST00000328300.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
COL4A5	ENST00000328300.11	c.2746A>G	p.Ser916Gly	missense_variant	32/53	1	NM_033380.3
COL4A5	ENST00000483338.1	c.1570A>G	p.Ser524Gly	missense_variant	16/20	1
COL4A5	ENST00000361603.7	c.2746A>G	p.Ser916Gly	missense_variant	32/51	2		P1

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 23

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.081
BayesDel_addAF	Pathogenic	0.28	D
BayesDel_noAF	Pathogenic	0.16
Cadd	Uncertain	24
Dann	Uncertain	0.99
FATHMM_MKL	Uncertain	0.86	D
LIST_S2	Uncertain	0.91	D;D;D
M_CAP	Pathogenic	0.34	D
MetaRNN	Uncertain	0.69	D;D;D
MetaSVM	Uncertain	0.37	D
MutationAssessor	Uncertain	2.3	M;M;.
MutationTaster	Benign	0.0010	A;A
PrimateAI	Benign	0.40	T
PROVEAN	Benign	-1.4	N;N;.
REVEL	Uncertain	0.42
Sift	Benign	0.066	T;D;.
Sift4G	Benign	0.069	T;T;.
Polyphen		0.10, 0.27	.;B;B
Vest4		0.77
MutPred		0.27		Loss of phosphorylation at S916 (P = 0.0082);Loss of phosphorylation at S916 (P = 0.0082);.;
MVP		0.95
MPC		0.28
ClinPred		0.87	D
GERP RS		5.7
Varity_R		0.32
gMVP		0.57

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.16		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

Other links and lift over

dbSNP: rs104886193; hg19: chrX-107865101;