22-21669953-A-G

Position:

• chr22-21669953-A-G

Variant summary

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

The NM_014337.4(PPIL2):​c.73A>G​(p.Lys25Glu) variant causes a missense change. 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.

• Frequency: Genomes: not found (cov: 33)
• Consequence: PPIL2 NM_014337.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.81

Genes affected

PPIL2 (HGNC:9261): (peptidylprolyl isomerase like 2) This gene is a member of the cyclophilin family of peptidylprolyl isomerases. The cyclophilins are a highly conserved ubiquitous family, members of which play an important role in protein folding, immunosuppression by cyclosporin A, and infection of HIV-1 virions. This protein interacts with the proteinase inhibitor eglin c and is localized in the nucleus. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Dec 2015]

PPIL2 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.29940403).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PPIL2	NM_014337.4	c.73A>G	p.Lys25Glu	missense_variant	2/20	ENST00000398831.8	NP_055152.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PPIL2	ENST00000398831.8	c.73A>G	p.Lys25Glu	missense_variant	2/20	1	NM_014337.4	ENSP00000381812.3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 33

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

Jul 10, 2024

The c.73A>G (p.K25E) alteration is located in exon 2 (coding exon 2) of the PPIL2 gene. This alteration results from a A to G substitution at nucleotide position 73, causing the lysine (K) at amino acid position 25 to be replaced by a glutamic acid (E). 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	Uncertain	0.46
BayesDel_addAF	Benign	-0.060	T
BayesDel_noAF	Benign	-0.32
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Benign	0.30	T;T;.;T;T
Eigen	Uncertain	0.42
Eigen_PC	Uncertain	0.42
FATHMM_MKL	Uncertain	0.90	D
LIST_S2	Benign	0.61	.;.;T;T;T
M_CAP	Benign	0.031	D
MetaRNN	Benign	0.30	T;T;T;T;T
MetaSVM	Benign	-0.85	T
MutationAssessor	Pathogenic	3.2	M;M;M;.;M
PrimateAI	Uncertain	0.59	T
PROVEAN	Uncertain	-2.4	N;N;.;D;N
REVEL	Benign	0.14
Sift	Benign	0.073	T;T;.;D;T
Sift4G	Benign	0.12	T;T;T;D;T
Polyphen		0.45	B;B;P;.;B
Vest4		0.34
MutPred		0.32		Loss of ubiquitination at K25 (P = 0.0134);Loss of ubiquitination at K25 (P = 0.0134);Loss of ubiquitination at K25 (P = 0.0134);.;Loss of ubiquitination at K25 (P = 0.0134);
MVP		0.34
ClinPred		0.96	D
GERP RS		4.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.19
gMVP		0.66

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr22-22024242;