rs756043994

Positions:

• chr9-35095201-C-G
• chr9-35095201-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_032634.4(PIGO):​c.365G>C​(p.Arg122Pro) variant causes a missense 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R122Q) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: PIGO NM_032634.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.71

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PIGO	NM_032634.4	c.365G>C	p.Arg122Pro	missense_variant	2/11	ENST00000378617.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PIGO	ENST00000378617.4	c.365G>C	p.Arg122Pro	missense_variant	2/11	1	NM_032634.4	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.17
BayesDel_addAF	Benign	-0.13	T
BayesDel_noAF	Benign	-0.43
CADD	Benign	20
DANN	Uncertain	0.98
DEOGEN2	Benign	0.091	.;.;T
Eigen	Benign	-0.44
Eigen_PC	Benign	-0.26
FATHMM_MKL	Uncertain	0.80	D
LIST_S2	Benign	0.82	.;T;T
M_CAP	Benign	0.0033	T
MetaRNN	Benign	0.13	T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.18	N;N;N
MutationTaster	Benign	0.99	D;D;D;D
PrimateAI	Benign	0.22	T
PROVEAN	Benign	-0.18	N;N;D
REVEL	Benign	0.073
Sift	Benign	0.22	T;T;T
Sift4G	Benign	0.36	T;T;T
Polyphen		0.0010	B;B;B
Vest4		0.25
MutPred		0.53		Loss of catalytic residue at R122 (P = 0.0122);Loss of catalytic residue at R122 (P = 0.0122);Loss of catalytic residue at R122 (P = 0.0122);
MVP		0.33
MPC		0.22
ClinPred		0.40	T
GERP RS		2.6
Varity_R		0.43
gMVP		0.82

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.23		Details are displayed if max score is > 0.2
DS_AG_spliceai		0.23		Position offset: -8

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

Publications

LitVar

Other links and lift over

dbSNP: rs756043994; hg19: chr9-35095198;