Genetic Variant CPPED1:p.Thr255Ala (chr16-12665068-T-C) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

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

The NM_018340.3(CPPED1):c.763A>G(p.Thr255Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000187 in 1,607,756 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 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

CPPED1
NM_018340.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.02

Variant links:

Genes affected

CPPED1 (HGNC:25632): (calcineurin like phosphoesterase domain containing 1) Predicted to enable metal ion binding activity; protein serine phosphatase activity; and protein threonine phosphatase activity. Predicted to be involved in protein dephosphorylation. Located in cytosol and plasma membrane. [provided by Alliance of Genome Resources, Apr 2022]

CPPED1 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=0.05276385).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CPPED1	NM_018340.3 link	c.763A>G	p.Thr255Ala	missense_variant	Exon 4 of 4	ENST00000381774.9	NP_060810.2	Q9BRF8-1
CPPED1	NM_001099455.2 link	c.337A>G	p.Thr113Ala	missense_variant	Exon 3 of 3		NP_001092925.1	Q9BRF8-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
CPPED1	ENST00000381774.9 link	c.763A>G	p.Thr255Ala	missense_variant	Exon 4 of 4	1	NM_018340.3	ENSP00000371193.4	Q9BRF8-1
CPPED1	ENST00000433677.6 link	c.337A>G	p.Thr113Ala	missense_variant	Exon 3 of 3	1		ENSP00000411127.2	Q9BRF8-2
CPPED1	ENST00000261660.4 link	c.290-48A>G		intron_variant	Intron 2 of 2	2		ENSP00000261660.4	Q9BRF8-3

Frequencies

GnomAD3 genomes

AF:

0.00000658

AC:

AN:

151996

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1455760

Hom.:

Cov.:

AF XY:

0.00000276

AC XY:

AN XY:

724632

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:

0.00000180

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000658

AC:

AN:

151996

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74230

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

May 21, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.763A>G (p.T255A) alteration is located in exon 4 (coding exon 4) of the CPPED1 gene. This alteration results from a A to G substitution at nucleotide position 763, causing the threonine (T) at amino acid position 255 to be replaced by an alanine (A). 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

0.079

BayesDel_addAF

Benign

0.011

BayesDel_noAF

Benign

-0.22

CADD

Benign

DANN

Benign

0.86

DEOGEN2

Benign

0.0016

T;.

Eigen

Benign

-0.61

Eigen_PC

Benign

-0.53

FATHMM_MKL

Benign

0.17

LIST_S2

Benign

0.55

T;T

M_CAP

Uncertain

0.088

MetaRNN

Benign

0.053

T;T

MetaSVM

Benign

-0.39

MutationAssessor

Benign

1.8

L;.

PrimateAI

Benign

0.29

PROVEAN

Benign

-1.1

N;N

REVEL

Benign

0.076

Sift

Benign

0.51

T;T

Sift4G

Benign

0.53

T;T

Polyphen

0.036

B;B

Vest4

0.029

MutPred

0.26

Loss of sheet (P = 0.1158);.;

MVP

0.57

MPC

0.052

ClinPred

0.082

GERP RS

0.16

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.038

gMVP

0.37

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