5-103138463-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PM2 PP2 BP4

The NM_001276277.3(PPIP5K2):c.481C>G(p.Pro161Ala) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: PPIP5K2 NM_001276277.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.46

Genes affected

PPIP5K2 (HGNC:29035): (diphosphoinositol pentakisphosphate kinase 2) This gene encodes a member of the histidine acid phosphatase family of proteins. Despite containing a histidine acid phosphatase domain, the encoded protein functions as an inositol pyrophosphate kinase, and is thought to lack phosphatase activity. This kinase activity is the mechanism by which the encoded protein synthesizes high-energy inositol pyrophosphates, which act as signaling molecules that regulate cellular homeostasis and other processes. This gene may be associated with autism spectrum disorder in human patients. [provided by RefSeq, Sep 2016]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant where missense usually causes diseases, PPIP5K2
• BP4: Computational evidence support a benign effect (MetaRNN=0.3564605).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PPIP5K2	NM_001276277.3	c.481C>G	p.Pro161Ala	missense_variant	5/31	ENST00000358359.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PPIP5K2	ENST00000358359.8	c.481C>G	p.Pro161Ala	missense_variant	5/31	1	NM_001276277.3	P4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 28

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 27, 2023

The c.481C>G (p.P161A) alteration is located in exon 4 (coding exon 4) of the PPIP5K2 gene. This alteration results from a C to G substitution at nucleotide position 481, causing the proline (P) at amino acid position 161 to be replaced by an alanine (A). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.24
BayesDel_addAF	Benign	-0.083	T
BayesDel_noAF	Benign	-0.36
Cadd	Uncertain	24
Dann	Benign	0.97
Eigen	Benign	0.13
Eigen_PC	Uncertain	0.22
FATHMM_MKL	Pathogenic	0.99	D
M_CAP	Benign	0.016	T
MetaRNN	Benign	0.36	T;T;T;T;T;T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Uncertain	2.2	M;.;M;.;.;M;.;.
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Uncertain	0.61	T
PROVEAN	Pathogenic	-6.5	D;D;D;.;.;D;.;D
REVEL	Benign	0.19
Sift	Uncertain	0.016	D;T;D;.;.;D;.;D
Sift4G	Benign	0.099	T;T;T;T;D;T;T;T
Polyphen		0.0050	B;B;B;.;.;B;.;.
Vest4		0.54
MutPred		0.34		Loss of glycosylation at P161 (P = 0.038);.;Loss of glycosylation at P161 (P = 0.038);Loss of glycosylation at P161 (P = 0.038);.;Loss of glycosylation at P161 (P = 0.038);Loss of glycosylation at P161 (P = 0.038);.;
MVP		0.49
MPC		0.87
ClinPred		0.92	D
GERP RS		4.0
Varity_R		0.69
gMVP		0.72

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		Details are displayed if max score is > 0.2

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr5-102474167;