chr7-113878249-G-A

Position:

chr7-113878249-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_002711.4(PPP1R3A):c.2843C>T(p.Thr948Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000428 in 1,612,896 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (no stars).

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000044 ( 0 hom. )

Consequence

PPP1R3A
NM_002711.4 missense

Scores

Clinical Significance

Uncertain significance no assertion criteria provided U:1

Conservation

PhyloP100: 0.302

Variant links:

Genes affected

PPP1R3A (HGNC:9291): (protein phosphatase 1 regulatory subunit 3A) The glycogen-associated form of protein phosphatase-1 (PP1) derived from skeletal muscle is a heterodimer composed of a 37-kD catalytic subunit and a 124-kD targeting and regulatory subunit. This gene encodes the regulatory subunit which binds to muscle glycogen with high affinity, thereby enhancing dephosphorylation of glycogen-bound substrates for PP1 such as glycogen synthase and glycogen phosphorylase kinase. [provided by RefSeq, Jul 2008]

PPP1R3A links:

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ACMG classification

Classification made for transcript

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=0.12586272).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PPP1R3A	NM_002711.4 linkuse as main transcript	c.2843C>T	p.Thr948Met	missense_variant	4/4	ENST00000284601.4	NP_002702.2
PPP1R3A	XM_005250473.4 linkuse as main transcript	c.2240C>T	p.Thr747Met	missense_variant	5/5		XP_005250530.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PPP1R3A	ENST00000284601.4 linkuse as main transcript	c.2843C>T	p.Thr948Met	missense_variant	4/4	1	NM_002711.4	ENSP00000284601	P1	Q16821-1

Frequencies

GnomAD3 genomes

AF:

0.0000329

AC:

AN:

151888

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000194

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000280

AC:

AN:

249732

Hom.:

AF XY:

0.0000445

AC XY:

AN XY:

134964

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000291

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000980

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000178

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.0000438

AC:

AN:

1461008

Hom.:

Cov.:

AF XY:

0.0000358

AC XY:

AN XY:

726846

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000504

Gnomad4 SAS exome

AF:

0.0000580

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000459

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

AF:

0.0000329

AC:

AN:

151888

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74190

show subpopulations

Gnomad4 AFR

AF:

0.0000483

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000194

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000451

Hom.:

Bravo

AF:

0.0000264

ExAC

AF:

0.0000330

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: no assertion criteria provided

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

Department of Pathology and Laboratory Medicine, Sinai Health System

The PPP1R3A p.Thr948Met variant was not identified in the literature nor was it identified in ClinVar or LOVD 3.0. The variant was identified in dbSNP (ID: rs754703917), Cosmic (FATHMM prediction of Neutral; score 0.16). The variant was also identified in control databases in 8 of 281096 chromosomes at a frequency of 0.000028 (Genome Aggregation Database Feb 27, 2017) and was observed in the following populations: Other in 1 of 7178 chromosomes (freq: 0.000139), South Asian in 3 of 30598 chromosomes (freq: 0.000098), African in 1 of 24920 chromosomes (freq: 0.00004), Latino in 1 of 35254 chromosomes (freq: 0.000028) and European (non-Finnish) in 2 of 127896 chromosomes (freq: 0.000016), while the variant was not observed in the Ashkenazi Jewish, East Asian and European (Finnish) populations. The variant occurs outside of the splicing consensus sequence and in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer) do not predict a difference in splicing. The p.Thr948 residue is not conserved in mammals and computational analyses (PolyPhen-2, SIFT, AlignGVGD, BLOSUM, MutationTaster) provide inconsistent predictions regarding the impact to the protein; this information is not very predictive of pathogenicity. In summary, based on the above information the clinical significance of this variant cannot be determined with certainty at this time. This variant is classified as a variant of uncertain significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Benign

-0.46

BayesDel_noAF

Benign

-0.69

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.18

Eigen

Benign

-0.19

Eigen_PC

Benign

-0.34

FATHMM_MKL

Benign

0.16

LIST_S2

Benign

0.42

M_CAP

Benign

0.0092

MetaRNN

Benign

0.13

MetaSVM

Benign

-1.1

MutationAssessor

Benign

2.0

MutationTaster

Benign

1.0

PrimateAI

Benign

0.24

PROVEAN

Benign

-1.8

REVEL

Benign

0.083

Sift

Benign

0.042

Sift4G

Uncertain

0.043

Polyphen

1.0

Vest4

0.046

MutPred

0.10

Loss of glycosylation at S947 (P = 0.0224);

MVP

0.52

MPC

0.064

ClinPred

0.26

GERP RS

3.9

Varity_R

0.031

gMVP

0.24

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