20-34583968-G-C

Variant names:

• chr20-34583968-G-C
• rs910873
• NM_080476.5:c.926+1469C>G

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BP4_Strong

The NM_080476.5(PIGU):​c.926+1469C>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000789 in 152,158 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.000079 (1 hom., cov: 31)
• Consequence: PIGU NM_080476.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.365
• Publications: 85 publications found

Genes affected

PIGU (HGNC:15791): (phosphatidylinositol glycan anchor biosynthesis class U) The protein encoded by this gene shares similarity with Saccharomyces cerevisiae Cdc91, a predicted integral membrane protein that may function in cell division control. The protein encoded by this gene is the fifth subunit of GPI transamidase that attaches GPI-anchors to proteins. [provided by RefSeq, Jul 2008]

PIGU Gene-Disease associations (from GenCC):

• glycosylphosphatidylinositol biosynthesis defect 21

  Inheritance: AD, AR Classification: STRONG, MODERATE, LIMITED Submitted by: Illumina, ClinGen, PanelApp Australia, Labcorp Genetics (formerly Invitae), Ambry Genetics

ACMG classification

Our verdict: Likely_benign. The variant received -4 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.88).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PIGU	NM_080476.5	c.926+1469C>G		intron_variant	Intron 9 of 11	ENST00000217446.8	NP_536724.1
PIGU	XM_017027664.2	c.783-2296C>G		intron_variant	Intron 8 of 10		XP_016883153.1
PIGU	XM_011528542.2	c.278+1469C>G		intron_variant	Intron 3 of 5		XP_011526844.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PIGU	ENST00000217446.8	c.926+1469C>G		intron_variant	Intron 9 of 11	1	NM_080476.5	ENSP00000217446.3
PIGU	ENST00000374820.6	c.866+1469C>G		intron_variant	Intron 8 of 10	1		ENSP00000363953.2
PIGU	ENST00000438215.1	c.164+1469C>G		intron_variant	Intron 3 of 5	3		ENSP00000395755.1
PIGU	ENST00000480175.1	n.245-2296C>G		intron_variant	Intron 2 of 3	3

Frequencies

GnomAD3 genomes AF: 0.0000789 AC: 12 AN: 152158 Hom.: 1 Cov.: 31

Gnomad AFR AF: 0.000217

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000621

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.0000789 AC: 12 AN: 152158 Hom.: 1 Cov.: 31 AF XY: 0.000121 AC XY: 9 AN XY: 74340

African (AFR) AF: 0.000217 AC: 9 AN: 41430

American (AMR) AF: 0.00 AC: 0 AN: 15286

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5196

South Asian (SAS) AF: 0.000621 AC: 3 AN: 4830

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10614

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68012

Other (OTH) AF: 0.00 AC: 0 AN: 2090

Alfa AF: 0.00 Hom.: 1753

Bravo AF: 0.0000642

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.88
CADD	Benign	0.21
DANN	Benign	0.54
PhyloP100		-0.36

Splicing

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

Other links and lift over

dbSNP: rs910873; hg19: chr20-33171772;