Genetic Variant PPME1:p.Met179Lys (chr11-74230382-T-A) – ACMG Classification: Uncertain_significance (3 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2PP3

The NM_016147.3(PPME1):c.536T>A(p.Met179Lys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,476 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

PPME1
NM_016147.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.93

Publications

0 publications found

Variant links:

Genes affected

PPME1 (HGNC:30178): (protein phosphatase methylesterase 1) This gene encodes a protein phosphatase methylesterase localized to the nucleus. The encoded protein acts on the protein phosphatase-2A catalytic subunit and supports the ERK pathway through dephosphorylation of regulatory proteins. It plays a role in malignant glioma progression. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Oct 2012]

PPME1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.825

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PPME1	NM_016147.3 link	c.536T>A	p.Met179Lys	missense_variant	Exon 6 of 14	ENST00000328257.13	NP_057231.1	Q9Y570-1A0A140VK39
PPME1	NM_001271593.2 link	c.536T>A	p.Met179Lys	missense_variant	Exon 6 of 14		NP_001258522.1	Q9Y570-4
PPME1	XM_047427116.1 link	c.536T>A	p.Met179Lys	missense_variant	Exon 6 of 12		XP_047283072.1
PPME1	XM_017017913.3 link	c.536T>A	p.Met179Lys	missense_variant	Exon 6 of 10		XP_016873402.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PPME1	ENST00000328257.13 link	c.536T>A	p.Met179Lys	missense_variant	Exon 6 of 14	1	NM_016147.3	ENSP00000329867.8		Q9Y570-1
PPME1	ENST00000398427.6 link	c.536T>A	p.Met179Lys	missense_variant	Exon 6 of 14	1		ENSP00000381461.4		Q9Y570-4

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461476

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727016

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33470

American (AMR)

AF:

0.00

AC:

AN:

44684

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26128

East Asian (EAS)

AF:

0.00

AC:

AN:

39692

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86218

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53394

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5764

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111760

Other (OTH)

AF:

0.00

AC:

AN:

60366

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000282

Hom.:

Bravo

AF:

0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Aug 12, 2021

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.536T>A (p.M179K) alteration is located in exon 6 (coding exon 6) of the PPME1 gene. This alteration results from a T to A substitution at nucleotide position 536, causing the methionine (M) at amino acid position 179 to be replaced by a lysine (K). 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

Pathogenic

0.99

BayesDel_addAF

Pathogenic

0.30

BayesDel_noAF

Pathogenic

0.19

CADD

Uncertain

(source)

DANN

Benign

0.96

DEOGEN2

Uncertain

0.71

D;.

Eigen

Uncertain

0.21

Eigen_PC

Uncertain

0.37

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.91

D;D

M_CAP

Benign

0.045

MetaRNN

Pathogenic

0.82

D;D

MetaSVM

Benign

-0.59

MutationAssessor

Benign

1.5

L;L

PhyloP100

7.9

PrimateAI

Pathogenic

0.80

PROVEAN

Uncertain

-3.4

D;D

REVEL

Uncertain

0.64

Sift

Uncertain

0.0020

D;D

Sift4G

Uncertain

0.0020

D;D

Polyphen

0.080

B;.

Vest4

0.81

MutPred

0.72

Gain of ubiquitination at M179 (P = 0.0408);Gain of ubiquitination at M179 (P = 0.0408);

MVP

0.65

MPC

0.84

ClinPred

0.96

GERP RS

5.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.94

gMVP

0.91

Mutation Taster

=26/74

disease causing

(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

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over