Genetic Variant PPP1R17:p.Ser125Phe (chr7-31697103-C-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_006658.5(PPP1R17):c.374C>T(p.Ser125Phe) variant causes a missense change. The variant allele was found at a frequency of 0.00000342 in 1,461,668 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000034 ( 0 hom. )

Consequence

PPP1R17
NM_006658.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.36

Variant links:

Genes affected

PPP1R17 (HGNC:16973): (protein phosphatase 1 regulatory subunit 17) The protein encoded by this gene is found primarily in cerebellar Purkinje cells, where it functions as a protein phosphatase inhibitor. The encoded protein is a substrate for cGMP-dependent protein kinase. An allele of this gene was discovered that increases susceptibility to hypercholesterolemia. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2010]

PPP1R17 links:

PDE1C (HGNC:8776): (phosphodiesterase 1C) This gene encodes an enzyme that belongs to the 3'5'-cyclic nucleotide phosphodiesterase family. Members of this family catalyze hydrolysis of the cyclic nucleotides, cyclic adenosine monophosphate and cyclic guanosine monophosphate, to the corresponding nucleoside 5'-monophosphates. The enzyme encoded by this gene regulates proliferation and migration of vascular smooth muscle cells, and neointimal hyperplasia. This enzyme also plays a role in pathological vascular remodeling by regulating the stability of growth factor receptors, such as PDGF-receptor-beta. [provided by RefSeq, Jul 2016]

PDE1C links:

Genome browser will be placed here

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
PPP1R17	NM_006658.5 link	c.374C>T	p.Ser125Phe	missense_variant	Exon 4 of 5	ENST00000342032.8	NP_006649.2	O96001-1A0A090N8N7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
PPP1R17	ENST00000342032.8 link	c.374C>T	p.Ser125Phe	missense_variant	Exon 4 of 5	1	NM_006658.5	ENSP00000340125.3	O96001-1
PPP1R17	ENST00000409146.3 link	c.221C>T	p.Ser74Phe	missense_variant	Exon 3 of 4	2		ENSP00000386459.3	O96001-2
PPP1R17	ENST00000498609.1 link	n.255C>T		non_coding_transcript_exon_variant	Exon 2 of 4	4

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000398

AC:

AN:

251060

Hom.:

AF XY:

0.00000737

AC XY:

AN XY:

135688

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

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:

0.00000881

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000342

AC:

AN:

1461668

Hom.:

Cov.:

AF XY:

0.00000413

AC XY:

AN XY:

727122

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000450

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000312

Hom.:

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Nov 10, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.374C>T (p.S125F) alteration is located in exon 4 (coding exon 3) of the PPP1R17 gene. This alteration results from a C to T substitution at nucleotide position 374, causing the serine (S) at amino acid position 125 to be replaced by a phenylalanine (F). 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

0.22

BayesDel_addAF

Benign

-0.066

BayesDel_noAF

Benign

-0.33

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.32

T;.

Eigen

Uncertain

0.35

Eigen_PC

Uncertain

0.46

FATHMM_MKL

Uncertain

0.97

LIST_S2

Benign

0.84

T;T

M_CAP

Benign

0.024

MetaRNN

Uncertain

0.43

T;T

MetaSVM

Benign

-0.92

MutationAssessor

Benign

1.5

L;.

PrimateAI

Benign

0.34

PROVEAN

Uncertain

-3.3

D;D

REVEL

Benign

0.12

Sift

Uncertain

0.012

D;D

Sift4G

Uncertain

0.037

D;D

Polyphen

0.47

P;.

Vest4

0.61

MutPred

0.27

Loss of disorder (P = 0.0488);.;

MVP

0.23

MPC

0.25

ClinPred

0.92

GERP RS

5.6

Varity_R

0.19

gMVP

0.16

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