12-81263269-G-T

Position:

• chr12-81263269-G-T

Variant summary

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

The NM_003625.5(PPFIA2):​c.3677C>A​(p.Thr1226Asn) 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: PPFIA2 NM_003625.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.91

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]

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=0.22782585).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PPFIA2	NM_003625.5	c.3677C>A	p.Thr1226Asn	missense_variant	31/33	ENST00000549396.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PPFIA2	ENST00000549396.6	c.3677C>A	p.Thr1226Asn	missense_variant	31/33	1	NM_003625.5	A1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

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

Aug 17, 2022

The c.3677C>A (p.T1226N) alteration is located in exon 31 (coding exon 29) of the PPFIA2 gene. This alteration results from a C to A substitution at nucleotide position 3677, causing the threonine (T) at amino acid position 1226 to be replaced by an asparagine (N). 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	-0.071	T
BayesDel_noAF	Benign	-0.34
CADD	Pathogenic	26
DANN	Uncertain	0.98
DEOGEN2	Benign	0.047	.;.;T;.;.;.;T;.;.;.;.
Eigen	Uncertain	0.49
Eigen_PC	Uncertain	0.56
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.88	D;D;D;D;D;D;D;D;D;.;D
M_CAP	Benign	0.015	T
MetaRNN	Benign	0.23	T;T;T;T;T;T;T;T;T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.3	.;.;L;.;.;.;.;.;.;.;.
MutationTaster	Benign	1.0	D;D;D;D;D;D;D;D;D
PROVEAN	Benign	-1.5	N;.;N;.;N;N;.;N;N;N;N
REVEL	Benign	0.16
Sift	Benign	0.048	D;.;T;.;T;T;.;T;T;T;T
Sift4G	Benign	0.097	T;T;T;T;T;T;T;T;T;T;T
Polyphen		0.98	.;.;D;.;.;.;.;.;.;.;.
Vest4		0.43
MutPred		0.16		.;.;Loss of sheet (P = 0.0228);Loss of sheet (P = 0.0228);.;.;.;.;.;.;.;
MVP		0.33
MPC		0.20
ClinPred		0.92	D
GERP RS		5.1
Varity_R		0.24
gMVP		0.38

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: chr12-81657048;