NM_032634.4:c.461C>A

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B.

-20

BP4_StrongBP6_Very_StrongBS1BS2

The NM_032634.4(PIGO):c.461C>A(p.Ala154Asp) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00338 in 1,613,384 control chromosomes in the GnomAD database, including 14 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A154T) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0026 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0035 ( 14 hom. )

Consequence

PIGO
NM_032634.4 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:6

Conservation

PhyloP100: 8.07

Publications

2 publications found

Variant links:

Genes affected

PIGO (HGNC:23215): (phosphatidylinositol glycan anchor biosynthesis class O) This gene encodes a protein that is involved in glycosylphosphatidylinositol (GPI)-anchor biosynthesis. The GPI-anchor is a glycolipid which contains three mannose molecules in its core backbone. The GPI-anchor is found on many blood cells and serves to anchor proteins to the cell surface. This protein is involved in the transfer of ethanolaminephosphate (EtNP) to the third mannose in GPI. At least three alternatively spliced transcripts encoding two distinct isoforms have been found for this gene. [provided by RefSeq, Jan 2011]

PIGO Gene-Disease associations (from GenCC):

complex neurodevelopmental disorder
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
hyperphosphatasia with intellectual disability syndrome 2
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Illumina, Labcorp Genetics (formerly Invitae), PanelApp Australia
hyperphosphatasia-intellectual disability syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

PIGO links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.012724459).

BP6

Variant 9-35095105-G-T is Benign according to our data. Variant chr9-35095105-G-T is described in ClinVar as [Likely_benign]. Clinvar id is 262099.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.00263 (401/152360) while in subpopulation NFE AF = 0.00376 (256/68036). AF 95% confidence interval is 0.00338. There are 0 homozygotes in GnomAd4. There are 216 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

BS2

High Homozygotes in GnomAdExome4 at 14 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PIGO	NM_032634.4 link	c.461C>A	p.Ala154Asp	missense_variant	Exon 2 of 11	ENST00000378617.4	NP_116023.2	Q8TEQ8-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PIGO	ENST00000378617.4 link	c.461C>A	p.Ala154Asp	missense_variant	Exon 2 of 11	1	NM_032634.4	ENSP00000367880.3		Q8TEQ8-1

Frequencies

GnomAD3 genomes

AF:

0.00263

AC:

401

AN:

152242

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000724

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00118

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00885

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00376

Gnomad OTH

AF:

0.00143

GnomAD2 exomes

AF:

0.00318

AC:

796

AN:

250386

AF XY:

0.00322

show subpopulations

Gnomad AFR exome

AF:

0.000492

Gnomad AMR exome

AF:

0.000869

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00976

Gnomad NFE exome

AF:

0.00470

Gnomad OTH exome

AF:

0.00262

GnomAD4 exome

AF:

0.00346

AC:

5054

AN:

1461024

Hom.:

Cov.:

AF XY:

0.00333

AC XY:

2421

AN XY:

726790

show subpopulations

African (AFR)

AF:

0.000627

AC:

AN:

33476

American (AMR)

AF:

0.00103

AC:

AN:

44670

Ashkenazi Jewish (ASJ)

AF:

0.000115

AC:

AN:

26004

East Asian (EAS)

AF:

0.00

AC:

AN:

39690

South Asian (SAS)

AF:

0.0000348

AC:

AN:

86136

European-Finnish (FIN)

AF:

0.0101

AC:

540

AN:

53352

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5762

European-Non Finnish (NFE)

AF:

0.00386

AC:

4292

AN:

1111568

Other (OTH)

AF:

0.00247

AC:

149

AN:

60366

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.478

Heterozygous variant carriers

325

651

976

1302

1627

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

152

304

456

608

760

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00263

AC:

401

AN:

152360

Hom.:

Cov.:

AF XY:

0.00290

AC XY:

216

AN XY:

74506

show subpopulations

African (AFR)

AF:

0.000721

AC:

AN:

41586

American (AMR)

AF:

0.00118

AC:

AN:

15306

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5186

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00885

AC:

AN:

10624

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00376

AC:

256

AN:

68036

Other (OTH)

AF:

0.00142

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.495

Heterozygous variant carriers

116

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00296

Hom.:

Bravo

AF:

0.00208

TwinsUK

AF:

0.00351

AC:

ALSPAC

AF:

0.00259

AC:

ESP6500AA

AF:

0.000908

AC:

ESP6500EA

AF:

0.00360

AC:

ExAC

AF:

0.00352

AC:

427

EpiCase

AF:

0.00289

EpiControl

AF:

0.00344

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:6

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Hyperphosphatasia with intellectual disability syndrome 2

Benign:2

Feb 02, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

not provided

Benign:2

May 01, 2025

CeGaT Center for Human Genetics Tuebingen

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

PIGO: BS1, BS2 -

Jun 02, 2017

Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not specified

Benign:1

Nov 22, 2017

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

PIGO-related disorder

Benign:1

Jun 05, 2024

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.39

BayesDel_addAF

Benign

-0.068

BayesDel_noAF

Uncertain

0.13

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.28

.;.;T

Eigen

Pathogenic

0.74

Eigen_PC

Pathogenic

0.77

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.94

.;D;D

M_CAP

Benign

0.022

MetaRNN

Benign

0.013

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.8

L;L;L

PhyloP100

8.1

PrimateAI

Uncertain

0.64

PROVEAN

Pathogenic

-5.0

D;D;D

REVEL

Uncertain

0.47

Sift

Uncertain

0.0020

D;D;D

Sift4G

Uncertain

0.0040

D;D;D

Polyphen

1.0

D;D;D

Vest4

0.83

MVP

0.71

MPC

0.79

ClinPred

0.043

GERP RS

5.9

Varity_R

0.89

gMVP

0.97

Mutation Taster

=90/10

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over