NM_000266.4:c.-77A>G

Variant names:

• chrX-43958722-T-C
• rs869312820
• NM_000266.4:c.-77A>G

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_000266.4(NDP):​c.-77A>G variant causes a 5 prime UTR premature start codon gain change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (no stars).

• Frequency: Genomes: not found (cov: 23)
• Consequence: NDP NM_000266.4 5_prime_UTR_premature_start_codon_gain
• Clinical Significance: Uncertain significance no assertion criteria provided U:1
• Conservation: PhyloP100: 0.732
• Publications: 0 publications found

Genes affected

NDP (HGNC:7678): (norrin cystine knot growth factor NDP) This gene encodes a secreted protein with a cystein-knot motif that activates the Wnt/beta-catenin pathway. The protein forms disulfide-linked oligomers in the extracellular matrix. Mutations in this gene result in Norrie disease and X-linked exudative vitreoretinopathy. [provided by RefSeq, Feb 2009]

NDP-AS1 (HGNC:40395): (NDP antisense RNA 1)

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.41).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000266.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NDP	NM_000266.4	MANE Select	c.-77A>G		5_prime_UTR_premature_start_codon_gain	Exon 2 of 3	NP_000257.1
	NDP	NM_000266.4	MANE Select	c.-77A>G		5_prime_UTR	Exon 2 of 3	NP_000257.1
	NDP-AS1	NR_046631.1		n.467-2063T>C		intron	N/A

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NDP	ENST00000642620.1	MANE Select	c.-77A>G		5_prime_UTR_premature_start_codon_gain	Exon 2 of 3	ENSP00000495972.1
	NDP	ENST00000642620.1	MANE Select	c.-77A>G		5_prime_UTR	Exon 2 of 3	ENSP00000495972.1
	NDP	ENST00000647044.1		c.-77A>G		5_prime_UTR_premature_start_codon_gain	Exon 3 of 4	ENSP00000495811.1

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 13

GnomAD4 genome Cov.: 23

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
-	1	-	Exudative retinopathy;C0339539:Familial exudative vitreoretinopathy (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.41
CADD	Benign	18
DANN	Benign	0.88
PhyloP100		0.73

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: rs869312820; hg19: chrX-43817968;