rs786200912

Positions:

• chrX-15321605-A-ATCAATGATAGAATCTGGAGTCATCCATCTCAATT

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PVS1_Moderate PM2 PP5

The NM_002641.4(PIGA):​c.1355_1356insAATTGAGATGGATGACTCCAGATTCTATCATTGA​(p.Asp452fs) variant causes a frameshift, stop gained change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 23)
• Consequence: PIGA NM_002641.4 frameshift, stop_gained
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 7.42

Genes affected

PIGA (HGNC:8957): (phosphatidylinositol glycan anchor biosynthesis class A) This gene encodes a protein required for synthesis of N-acetylglucosaminyl phosphatidylinositol (GlcNAc-PI), the first intermediate in the biosynthetic pathway of GPI anchor. The GPI anchor is a glycolipid found on many blood cells and which serves to anchor proteins to the cell surface. Paroxysmal nocturnal hemoglobinuria, an acquired hematologic disorder, has been shown to result from mutations in this gene. Alternate splice variants have been characterized. A related pseudogene is located on chromosome 12. [provided by RefSeq, Jun 2010]

PIGA (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 5 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. Fraction of 0.0687 CDS is truncated, and there are 0 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant X-15321605-A-ATCAATGATAGAATCTGGAGTCATCCATCTCAATT is Pathogenic according to our data. Variant chrX-15321605-A-ATCAATGATAGAATCTGGAGTCATCCATCTCAATT is described in ClinVar as [Pathogenic]. Clinvar id is 9966.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PIGA	NM_002641.4	c.1355_1356insAATTGAGATGGATGACTCCAGATTCTATCATTGA	p.Asp452fs	frameshift_variant, stop_gained	6/6	ENST00000333590.6	NP_002632.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PIGA	ENST00000333590.6	c.1355_1356insAATTGAGATGGATGACTCCAGATTCTATCATTGA	p.Asp452fs	frameshift_variant, stop_gained	6/6	1	NM_002641.4	ENSP00000369820.3

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 23

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Paroxysmal nocturnal hemoglobinuria Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Nov 01, 1998

- -

Computational scores

Source: dbNSFP v4.3

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs786200912; hg19: chrX-15339727;