Genetic Variant CNPPD1:p.Arg275Cys (chr2-219172996-G-A) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

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

The NM_015680.6(CNPPD1):c.823C>T(p.Arg275Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000304 in 1,613,758 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

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

Exomes 𝑓: 0.000030 ( 0 hom. )

Consequence

CNPPD1
NM_015680.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.247

Variant links:

Genes affected

CNPPD1 (HGNC:25220): (cyclin Pas1/PHO80 domain containing 1) Predicted to enable cyclin-dependent protein serine/threonine kinase regulator activity. Predicted to be involved in regulation of cyclin-dependent protein serine/threonine kinase activity. Predicted to be integral component of membrane. Predicted to be part of cyclin-dependent protein kinase holoenzyme complex. Predicted to be active in nucleus. [provided by Alliance of Genome Resources, Apr 2022]

CNPPD1 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=0.06821048).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CNPPD1	NM_015680.6 link	c.823C>T	p.Arg275Cys	missense_variant	Exon 8 of 8	ENST00000360507.10	NP_056495.4	Q9BV87A0A024R432

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
CNPPD1	ENST00000360507.10 link	c.823C>T	p.Arg275Cys	missense_variant	Exon 8 of 8	1	NM_015680.6	ENSP00000353698.5	Q9BV87
CNPPD1	ENST00000409789.5 link	c.823C>T	p.Arg275Cys	missense_variant	Exon 9 of 9	1		ENSP00000386277.1	Q9BV87
CNPPD1	ENST00000453038.5 link	c.823C>T	p.Arg275Cys	missense_variant	Exon 9 of 9	2		ENSP00000410109.1	C9JF31
CNPPD1	ENST00000451647.1 link	c.*55C>T		downstream_gene_variant		3		ENSP00000405997.1	C9J597

Frequencies

GnomAD3 genomes

AF:

0.0000329

AC:

AN:

152126

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

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:

0.0000942

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000399

AC:

AN:

250516

Hom.:

AF XY:

0.0000443

AC XY:

AN XY:

135506

show subpopulations

Gnomad AFR exome

AF:

0.0000617

Gnomad AMR exome

AF:

0.0000868

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.000187

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.0000301

AC:

AN:

1461632

Hom.:

Cov.:

AF XY:

0.0000358

AC XY:

AN XY:

727098

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000112

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.000150

Gnomad4 NFE exome

AF:

0.0000261

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000329

AC:

AN:

152126

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74320

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.0000942

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000108

Hom.:

ExAC

AF:

0.0000247

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jan 18, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.823C>T (p.R275C) alteration is located in exon 8 (coding exon 8) of the CNPPD1 gene. This alteration results from a C to T substitution at nucleotide position 823, causing the arginine (R) at amino acid position 275 to be replaced by a cysteine (C). 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

0.094

BayesDel_addAF

Benign

-0.27

BayesDel_noAF

Benign

-0.43

CADD

Benign

8.7

DANN

Benign

0.93

DEOGEN2

Benign

0.0042

T;T;.

Eigen

Benign

-1.1

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.073

LIST_S2

Benign

0.82

.;T;T

M_CAP

Benign

0.010

MetaRNN

Benign

0.068

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.34

N;N;.

PrimateAI

Benign

0.20

PROVEAN

Benign

-1.5

N;N;N

REVEL

Benign

0.081

Sift

Uncertain

0.021

D;D;D

Sift4G

Uncertain

0.053

T;T;.

Polyphen

0.73

P;P;.

Vest4

0.22

MVP

0.17

MPC

0.37

ClinPred

0.027

GERP RS

-1.4

Varity_R

0.061

gMVP

0.27

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