chr4-88523591-G-A

Position:

• chr4-88523591-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_032906.5(PYURF):​c.110C>T​(p.Ala37Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000716 in 1,396,846 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 11/18 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 7.2e-7 (0 hom.)
• Consequence: PYURF NM_032906.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.0350

Genes affected

PYURF (HGNC:44317): (PIGY upstream open reading frame) The product of this gene, which is well-conserved, is encoded by the same bicistronic transcript that encodes phosphatidylinositol glycan anchor biosynthesis, class Y, but the two proteins are unrelated. This gene represents the protein encoded by the upstream open reading frame, while the protein encoded by the downstream open reading frame is represented by GeneID:84992. [provided by RefSeq, Aug 2012]

PIGY (HGNC:28213): (phosphatidylinositol glycan anchor biosynthesis class Y) The protein encoded by this gene is part of the GPI-N-acetylglucosaminyltransferase (GIP-GnT) complex which initiates the biosynthesis of glycosylphosphatidylinositol (GPI). GPI is synthesized in the endoplasmic reticulum and serves as an anchor for many surface proteins. Proteins containing GPI anchors can have an important role in cell-cell interactions. The transcript for this gene is bicistronic. The downstream open reading frame encodes this GPI-GnT complex protein, while the upstream open reading frame encodes a protein with unknown function, as represented by GeneID:100996939. [provided by RefSeq, Aug 2012]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.0944905).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PYURF	NM_032906.5	c.110C>T	p.Ala37Val	missense_variant	1/2	ENST00000273968.5	NP_116295.1
PIGY	NM_001042616.3	c.-334C>T		5_prime_UTR_variant	1/2	ENST00000527353.2	NP_001036081.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PYURF	ENST00000273968.5	c.110C>T	p.Ala37Val	missense_variant	1/2	1	NM_032906.5	ENSP00000273968.4
PIGY	ENST00000527353.2	c.-334C>T		5_prime_UTR_variant	1/2	6	NM_001042616.3	ENSP00000432688.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 7.16e-7 AC: 1 AN: 1396846 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 688926

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 9.27e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

Alfa AF: 0.0000712 Hom.: 0

Bravo AF: 0.0000113

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Hyperphosphatasia with intellectual disability syndrome 6 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Baylor Genetics

Dec 01, 2018

This variant was determined to be of uncertain significance according to ACMG Guidelines, 2015 [PMID:25741868]. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.096
BayesDel_addAF	Benign	-0.15	T
BayesDel_noAF	Benign	-0.45
CADD	Benign	13
DANN	Uncertain	1.0
DEOGEN2	Benign	0.025	T
Eigen	Benign	-0.51
Eigen_PC	Benign	-0.59
FATHMM_MKL	Benign	0.41	N
LIST_S2	Benign	0.47	T
M_CAP	Benign	0.065	D
MetaRNN	Benign	0.094	T
MetaSVM	Benign	-0.61	T
MutationAssessor	Uncertain	2.2	M
PrimateAI	Uncertain	0.63	T
PROVEAN	Benign	-1.4	N
REVEL	Benign	0.053
Sift	Benign	0.032	D
Sift4G	Benign	0.10	T
Polyphen		0.28	B
Vest4		0.043
MVP		0.17
ClinPred		0.62	D
GERP RS		3.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.2
Varity_R		0.13
gMVP		0.48

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

LitVar

Other links and lift over

dbSNP: rs1401283490; hg19: chr4-89444742;