11-67401088-T-C

Position:

• chr11-67401088-T-C

Variant summary

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

The NM_002708.4(PPP1CA):​c.167A>G​(p.Glu56Gly) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: PPP1CA NM_002708.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.91

Genes affected

PPP1CA (HGNC:9281): (protein phosphatase 1 catalytic subunit alpha) The protein encoded by this gene is one of the three catalytic subunits of protein phosphatase 1 (PP1). This broadly expressed gene encodes the alpha subunit of the PP1 complex that associates with over 200 regulatory proteins to form holoenzymes which dephosphorylate their biological targets with high specificity. PP1 is a serine/threonine specific protein phosphatase known to be involved in the regulation of a variety of cellular processes, such as cell division, glycogen metabolism, muscle contractility, protein synthesis, and HIV-1 viral transcription. Increased PP1 activity has been observed in the end stage of heart failure. Studies suggest that PP1 is an important regulator of cardiac function and that PP1 deregulation is implicated in diabetes and multiple types of cancer. Three alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2020]

ACMG classification

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/exons	MANE	UniProt
PPP1CA	NM_002708.4	c.167A>G	p.Glu56Gly	missense_variant	2/7	ENST00000376745.9
PPP1CA	NM_001008709.2	c.200A>G	p.Glu67Gly	missense_variant	2/7
PPP1CA	NM_206873.2	c.56-169A>G		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PPP1CA	ENST00000376745.9	c.167A>G	p.Glu56Gly	missense_variant	2/7	1	NM_002708.4	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000378

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

Jun 06, 2023

The c.200A>G (p.E67G) alteration is located in exon 2 (coding exon 2) of the PPP1CA gene. This alteration results from a A to G substitution at nucleotide position 200, causing the glutamic acid (E) at amino acid position 67 to be replaced by a glycine (G). 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	Uncertain	0.53
BayesDel_addAF	Uncertain	0.084	D
BayesDel_noAF	Benign	-0.12
CADD	Pathogenic	29
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.52	.;D;.;.;T
Eigen	Benign	0.16
Eigen_PC	Benign	0.20
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Uncertain	0.88	D;D;D;D;D
M_CAP	Benign	0.076	D
MetaRNN	Uncertain	0.60	D;D;D;D;D
MetaSVM	Benign	-1.1	T
MutationAssessor	Pathogenic	3.8	.;H;.;.;.
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Uncertain	0.75	T
PROVEAN	Pathogenic	-5.6	D;D;D;D;D
REVEL	Uncertain	0.37
Sift	Pathogenic	0.0	D;D;D;D;D
Sift4G	Uncertain	0.047	D;D;T;D;.
Polyphen		0.0030	.;B;.;.;.
Vest4		0.65
MVP		0.49
MPC		1.6
ClinPred		0.99	D
GERP RS		4.9
Varity_R		0.92
gMVP		0.83

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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

Other links and lift over

dbSNP: rs868163307; hg19: chr11-67168559;