Genetic Variant PPFIA2:p.Met1079Thr (chr12-81277391-A-G) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_003625.5(PPFIA2):c.3236T>C(p.Met1079Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000326 in 1,535,276 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000029 ( 0 hom. )

Consequence

PPFIA2
NM_003625.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 9.10

Variant links:

Genes affected

PPFIA2 (HGNC:9246): (PTPRF interacting protein alpha 2) The protein encoded by this gene is a member of the LAR protein-tyrosine phosphatase-interacting protein (liprin) family. Liprins interact with members of LAR family of transmembrane protein tyrosine phosphatases, which are known to be important for axon guidance and mammary gland development. It has been proposed that liprins are multivalent proteins that form complex structures and act as scaffolds for the recruitment and anchoring of LAR family of tyrosine phosphatases. This protein has been shown to bind the calcium/calmodulin-dependent serine protein kinase (MAGUK family) protein (also known as CASK) and proposed to regulate higher-order brain functions in mammals. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Sep 2013]

PPFIA2 links:

PPFIA2-AS1 (HGNC:53397): (PPFIA2 antisense RNA 1)

PPFIA2-AS1 links:

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ACMG classification

Classification made for transcript

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 rank	MANE	Protein	UniProt
PPFIA2	NM_003625.5 link	c.3236T>C	p.Met1079Thr	missense_variant	Exon 28 of 33	ENST00000549396.6	NP_003616.2	O75334-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PPFIA2	ENST00000549396.6 link	c.3236T>C	p.Met1079Thr	missense_variant	Exon 28 of 33	1	NM_003625.5	ENSP00000450337.1		O75334-1

Frequencies

GnomAD3 genomes

AF:

0.00000660

AC:

AN:

151564

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0000964

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000130

AC:

AN:

153930

Hom.:

AF XY:

0.00

AC XY:

AN XY:

82596

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000104

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000289

AC:

AN:

1383712

Hom.:

Cov.:

AF XY:

0.00000146

AC XY:

AN XY:

683812

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000636

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000135

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

9.29e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000660

AC:

AN:

151564

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74002

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.0000964

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jul 02, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.3236T>C (p.M1079T) alteration is located in exon 28 (coding exon 26) of the PPFIA2 gene. This alteration results from a T to C substitution at nucleotide position 3236, causing the methionine (M) at amino acid position 1079 to be replaced by a threonine (T). 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

0.77

BayesDel_addAF

Uncertain

0.088

BayesDel_noAF

Uncertain

0.10

CADD

Pathogenic

DANN

Uncertain

0.99

DEOGEN2

Benign

0.28

.;.;T;.;.;.;T;.;.;.;.

Eigen

Uncertain

0.67

Eigen_PC

Pathogenic

0.70

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.96

D;D;D;D;D;D;D;D;D;.;D

M_CAP

Benign

0.027

MetaRNN

Uncertain

0.67

D;D;D;D;D;D;D;D;D;D;D

MetaSVM

Benign

-0.82

MutationAssessor

Benign

1.1

.;.;L;.;.;.;.;.;.;.;.

PrimateAI

Pathogenic

0.94

PROVEAN

Pathogenic

-5.7

D;.;D;D;D;D;.;D;D;D;D

REVEL

Uncertain

0.52

Sift

Benign

0.21

T;.;D;D;D;D;.;D;D;D;D

Sift4G

Uncertain

0.054

T;D;D;D;D;D;D;D;D;D;D

Polyphen

0.92

.;.;P;.;.;.;.;.;.;.;.

Vest4

0.71

MutPred

0.51

.;.;Loss of catalytic residue at M1079 (P = 0.0087);Loss of catalytic residue at M1079 (P = 0.0087);.;.;.;.;.;.;.;

MVP

0.76

MPC

2.0

ClinPred

0.96

GERP RS

5.7

Varity_R

0.68

gMVP

0.61

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over