X-108440127-T-G

Variant names:

• chrX-108440127-T-G
• NM_033380.3:c.2T>G

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PVS1_Supporting PM2 PP5_Moderate

The NM_033380.3(COL4A5):​c.2T>G​(p.Met1?) variant causes a start lost 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 Likely pathogenic (★).

• Frequency: Genomes: not found (cov: 20)
• Consequence: COL4A5 NM_033380.3 start_lost
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 1.77

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.

• PVS1: Start lost variant, no pathogenic variants between lost start and next in-frame start position. Next in-frame start position is after 109 codons. Genomic position: 108568762. Lost 0.064 part of the original CDS.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant X-108440127-T-G is Pathogenic according to our data. Variant chrX-108440127-T-G is described in ClinVar as [Likely_pathogenic]. Clinvar id is 3597846.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COL4A5	NM_033380.3	c.2T>G	p.Met1?	start_lost	Exon 1 of 53	ENST00000328300.11	NP_203699.1
COL4A5	NM_000495.5	c.2T>G	p.Met1?	start_lost	Exon 1 of 51		NP_000486.1
COL4A5	XM_047441811.1	c.2T>G	p.Met1?	start_lost	Exon 1 of 42		XP_047297767.1
COL4A5	XM_047441810.1	c.-375T>G		5_prime_UTR_variant	Exon 1 of 54		XP_047297766.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
COL4A5	ENST00000328300.11	c.2T>G	p.Met1?	start_lost	Exon 1 of 53	1	NM_033380.3	ENSP00000331902.7

Frequencies

GnomAD3 genomes Cov.: 20

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 20

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

X-linked Alport syndrome Pathogenic:1

Feb 08, 2024

Fulgent Genetics, Fulgent Genetics

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.74	D
BayesDel_noAF	Pathogenic	0.53
CADD	Benign	23
DANN	Uncertain	0.98
DEOGEN2	Benign	0.13	.;T
FATHMM_MKL	Benign	0.51	D
LIST_S2	Uncertain	0.90	D;D
M_CAP	Pathogenic	0.96	D
MetaRNN	Pathogenic	0.99	D;D
MetaSVM	Uncertain	0.52	D
PROVEAN	Benign	-1.3	N;N
REVEL	Pathogenic	0.69
Sift	Uncertain	0.0020	D;D
Sift4G	Pathogenic	0.0	D;D
Polyphen		0.86	.;P
Vest4		0.93
MutPred		0.88		Gain of MoRF binding (P = 0.0149);Gain of MoRF binding (P = 0.0149);
MVP		1.0
ClinPred		0.97	D
GERP RS		4.7
Varity_R		0.96
gMVP		0.97

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

No publications associated with this variant yet.

Other links and lift over

hg19: chrX-107683357;