Genetic Variant CNPY3:p.Ser92* (chr6-42934598-C-A) – ACMG Classification: Pathogenic (10 pts)

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PVS1PM2

The NM_006586.5(CNPY3):c.275C>A(p.Ser92*) variant causes a stop gained, splice region change. The variant allele was found at a frequency of 0.000000684 in 1,461,454 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 2/3 splice prediction tools predict no significant impact on normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

CNPY3
NM_006586.5 stop_gained, splice_region

Scores

Splicing: ADA: 0.8552

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 7.04

Publications

0 publications found

Variant links:

Genes affected

CNPY3 (HGNC:11968): (canopy FGF signaling regulator 3) This gene encodes a protein that binds members of the toll-like receptor protein family and functions as a chaperone to aid in folding and export of these proteins. Alternative splicing results in multiple transcript variants. Naturally occuring readthrough transcription occurs between this locus and the downstream GNMT (glycine N-methyltransferase) gene and is represented with GeneID:107080644. [provided by RefSeq, Jan 2016]

CNPY3 Gene-Disease associations (from GenCC):

developmental and epileptic encephalopathy, 60
Inheritance: AR, Unknown Classification: STRONG, LIMITED Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae)
infantile spasms
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

CNPY3 links:

CNPY3-GNMT (HGNC:):

CNPY3-GNMT links:

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ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 10 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PM2

Very rare variant in population databases, with high coverage;

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006586.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
CNPY3	NM_006586.5	MANE Select	c.275C>A	p.Ser92*	stop_gained splice_region	Exon 2 of 6	NP_006577.2
CNPY3	NM_001318842.1		c.275C>A	p.Ser92Tyr	missense splice_region	Exon 2 of 7	NP_001305771.1
CNPY3	NM_001318848.2		c.275C>A	p.Ser92*	stop_gained splice_region	Exon 2 of 3	NP_001305777.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
CNPY3	ENST00000372836.5	TSL:1 MANE Select	c.275C>A	p.Ser92*	stop_gained splice_region	Exon 2 of 6	ENSP00000361926.4	Q9BT09-1
CNPY3	ENST00000893179.1		c.275C>A	p.Ser92Tyr	missense splice_region	Exon 2 of 6	ENSP00000563238.1
CNPY3	ENST00000924680.1		c.437C>A	p.Ser146*	stop_gained splice_region	Exon 3 of 7	ENSP00000594739.1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461454

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727032

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33466

American (AMR)

AF:

0.00

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26122

East Asian (EAS)

AF:

0.00

AC:

AN:

39696

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86206

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53386

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5606

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111880

Other (OTH)

AF:

0.00

AC:

AN:

60370

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.62

BayesDel_noAF

Pathogenic

0.65

CADD

Pathogenic

(source)

DANN

Uncertain

0.99

Eigen

Pathogenic

0.88

Eigen_PC

Pathogenic

0.74

FATHMM_MKL

Pathogenic

0.98

PhyloP100

7.0

Vest4

0.51

GERP RS

4.7

Mutation Taster

=17/183

disease causing (fs/PTC)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.86

dbscSNV1_RF

Pathogenic

0.80

SpliceAI score (max)

0.080

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over