rs1553925558

Positions:

• chr4-101109063-T-C

Variant summary

Our verdict is Pathogenic. Variant got 17 ACMG points: 17P and 0B. PM1 PM2 PM5 PP2 PP3_Moderate PP5_Very_Strong

The NM_000944.5(PPP3CA):​c.275A>G​(p.His92Arg) 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 pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. H92D) has been classified as Pathogenic.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: PPP3CA NM_000944.5 missense
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:3
• Conservation: PhyloP100: 7.73

Genes affected

PPP3CA (HGNC:9314): (protein phosphatase 3 catalytic subunit alpha) Enables several functions, including ATPase binding activity; calmodulin binding activity; and calmodulin-dependent protein phosphatase activity. Involved in several processes, including calcineurin-NFAT signaling cascade; peptidyl-serine dephosphorylation; and response to calcium ion. Located in several cellular components, including cytosol; dendritic spine; and nucleoplasm. Part of calcineurin complex. Colocalizes with cytoplasmic side of plasma membrane. Implicated in developmental and epileptic encephalopathy 91. Biomarker of focal segmental glomerulosclerosis and schizophrenia. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Pathogenic. Variant got 17 ACMG points.

• PM1: In a region_of_interest Catalytic (size 284) in uniprot entity PP2BA_HUMAN there are 15 pathogenic changes around while only 2 benign (88%) in NM_000944.5
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr4-101109064-G-C is described in ClinVar as [Pathogenic]. Clinvar id is 3252473.Status of the report is criteria_provided_single_submitter, 1 stars.
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), PPP3CA. . Gene score misZ 3.6261 (greater than the threshold 3.09). Trascript score misZ 4.4954 (greater than threshold 3.09). GenCC has associacion of gene with epileptic encephalopathy, infantile or early childhood, 1, arthrogryposis, cleft palate, craniosynostosis, and impaired intellectual development, autosomal dominant non-syndromic intellectual disability, undetermined early-onset epileptic encephalopathy.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.908
• PP5: Variant 4-101109063-T-C is Pathogenic according to our data. Variant chr4-101109063-T-C is described in ClinVar as [Pathogenic]. Clinvar id is 441272.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PPP3CA	NM_000944.5	c.275A>G	p.His92Arg	missense_variant	3/14	ENST00000394854.8
PPP3CA	NM_001130691.2	c.275A>G	p.His92Arg	missense_variant	3/13
PPP3CA	NM_001130692.2	c.275A>G	p.His92Arg	missense_variant	3/12

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PPP3CA	ENST00000394854.8	c.275A>G	p.His92Arg	missense_variant	3/14	1	NM_000944.5	P3

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1461134 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 726946

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: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 31

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Inborn genetic diseases Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 21, 2018

- -

Epileptic encephalopathy, infantile or early childhood, 1 Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Mar 15, 2021

- -

Seizure;C3714756:Intellectual disability Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Génétique des Maladies du Développement, Hospices Civils de Lyon

Feb 25, 2020

De novo variant, absent from gnomAD, previously described. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.32	D
BayesDel_noAF	Pathogenic	0.23
CADD	Uncertain	26
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.96	D;.;.;D;.
Eigen	Pathogenic	1.0
Eigen_PC	Pathogenic	0.88
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Pathogenic	1.0	D;D;D;D;D
M_CAP	Uncertain	0.13	D
MetaRNN	Pathogenic	0.91	D;D;D;D;D
MetaSVM	Uncertain	0.35	D
MutationAssessor	Pathogenic	4.2	H;H;H;.;.
MutationTaster	Benign	1.0	D;D;D;D;D;D
PrimateAI	Pathogenic	0.93	D
PROVEAN	Pathogenic	-7.8	D;D;D;D;D
REVEL	Pathogenic	0.78
Sift	Pathogenic	0.0	D;D;D;D;D
Sift4G	Uncertain	0.025	D;D;D;D;D
Polyphen		1.0	D;.;D;.;.
Vest4		0.96
MutPred		0.73		Loss of helix (P = 0.1299);Loss of helix (P = 0.1299);Loss of helix (P = 0.1299);.;.;
MVP		0.85
MPC		2.5
ClinPred		1.0	D
GERP RS		5.1
Varity_R		0.99
gMVP		1.0

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

Other links and lift over

dbSNP: rs1553925558; hg19: chr4-102030220;