22-50443888-C-A

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001242898.2(PPP6R2):c.2602C>A(p.Leu868Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000656 in 1,584,532 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00027 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000044 ( 0 hom. )

Consequence

PPP6R2
NM_001242898.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.365

Variant links:

Genes affected

PPP6R2 (HGNC:19253): (protein phosphatase 6 regulatory subunit 2) The protein encoded by this gene is a regulatory protein for the protein phosphatase-6 catalytic subunit. Together, these proteins act as a significant T-loop phosphatase for Aurora A, an essential mitotic kinase. Loss of function of either the regulatory or catalytic subunit of protein phosphatase-6 interferes with spindle formation and chromosome alignment. [provided by RefSeq, May 2017]

PPP6R2 links:

SBF1 (HGNC:10542): (SET binding factor 1) This gene encodes a member of the protein-tyrosine phosphatase family. However, the encoded protein does not appear to be a catalytically active phosphatase because it lacks several amino acids in the catalytic pocket. This protein contains a Guanine nucleotide exchange factor (GEF) domain which is necessary for its role in growth and differentiation. Mutations in this gene have been associated with Charcot-Marie-Tooth disease 4B3. Pseudogenes of this gene have been defined on chromosomes 1 and 8. [provided by RefSeq, Dec 2014]

SBF1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.010462105).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PPP6R2	NM_001242898.2 link	c.2602C>A	p.Leu868Met	missense_variant	Exon 23 of 24	ENST00000612753.5	NP_001229827.1	O75170-5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PPP6R2	ENST00000612753.5 link	c.2602C>A	p.Leu868Met	missense_variant	Exon 23 of 24	2	NM_001242898.2	ENSP00000478417.1		O75170-5

Frequencies

GnomAD3 genomes

AF:

0.000276

AC:

AN:

152124

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000965

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.0000298

AC:

AN:

201280

Hom.:

AF XY:

0.0000365

AC XY:

AN XY:

109476

show subpopulations

Gnomad AFR exome

AF:

0.000509

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000440

AC:

AN:

1432290

Hom.:

Cov.:

AF XY:

0.0000408

AC XY:

AN XY:

710134

show subpopulations

Gnomad4 AFR exome

AF:

0.00144

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000264

Gnomad4 SAS exome

AF:

0.0000361

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.000186

GnomAD4 genome

AF:

0.000269

AC:

AN:

152242

Hom.:

Cov.:

AF XY:

0.000309

AC XY:

AN XY:

74448

show subpopulations

Gnomad4 AFR

AF:

0.000938

Gnomad4 AMR

AF:

0.0000653

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.000178

Hom.:

Bravo

AF:

0.000306

ESP6500AA

AF:

0.000685

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000497

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Aug 20, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.2602C>A (p.L868M) alteration is located in exon 23 (coding exon 21) of the PPP6R2 gene. This alteration results from a C to A substitution at nucleotide position 2602, causing the leucine (L) at amino acid position 868 to be replaced by a methionine (M). 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

0.10

BayesDel_addAF

Benign

-0.49

BayesDel_noAF

Benign

-0.58

CADD

Benign

6.4

DANN

Benign

0.90

DEOGEN2

Benign

0.0015

.;.;.;.;T

Eigen

Benign

-0.86

Eigen_PC

Benign

-0.95

FATHMM_MKL

Benign

0.36

LIST_S2

Benign

0.45

T;T;T;T;T

M_CAP

Benign

0.0059

MetaRNN

Benign

0.010

T;T;T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.69

.;.;.;.;N

PrimateAI

Benign

0.32

PROVEAN

Benign

-0.26

N;.;N;N;N

REVEL

Benign

0.10

Sift

Benign

0.17

T;.;T;T;T

Sift4G

Benign

0.11

T;T;T;T;T

Polyphen

0.68

P;P;P;P;B

Vest4

0.25

MVP

0.12

MPC

0.033

ClinPred

0.045

GERP RS

1.2

RBP_binding_hub_radar

0.97

RBP_regulation_power_radar

2.1

Varity_R

0.091

gMVP

0.14

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