Genetic Variant CNFN:p.Asp55Asn (chr19-42387426-C-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_032488.4(CNFN):c.163G>A(p.Asp55Asn) variant causes a missense change. The variant allele was found at a frequency of 0.00000187 in 1,601,452 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 31)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

CNFN
NM_032488.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.14

Variant links:

Genes affected

CNFN (HGNC:30183): (cornifelin) Predicted to be involved in keratinization. Located in cornified envelope. [provided by Alliance of Genome Resources, Apr 2022]

CNFN links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CNFN	NM_032488.4 link	c.163G>A	p.Asp55Asn	missense_variant	Exon 3 of 4	ENST00000222032.10	NP_115877.2	Q9BYD5
CNFN	XM_005259332.4 link	c.202G>A	p.Asp68Asn	missense_variant	Exon 4 of 5		XP_005259389.1
CNFN	XM_011527396.3 link	c.202G>A	p.Asp68Asn	missense_variant	Exon 4 of 5		XP_011525698.1
CNFN	XM_011527397.3 link	c.202G>A	p.Asp68Asn	missense_variant	Exon 4 of 5		XP_011525699.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CNFN	ENST00000222032.10 link	c.163G>A	p.Asp55Asn	missense_variant	Exon 3 of 4	1	NM_032488.4	ENSP00000222032.4		Q9BYD5
CNFN	ENST00000597255.1 link	c.163G>A	p.Asp55Asn	missense_variant	Exon 4 of 5	1		ENSP00000469590.1		Q9BYD5

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152180

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:

0.000193

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000133

AC:

AN:

224910

Hom.:

AF XY:

0.00

AC XY:

AN XY:

122984

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000180

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:

0.00000138

AC:

AN:

1449272

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

720144

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000256

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

9.03e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152180

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74328

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000151

ExAC

AF:

0.00000829

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jun 28, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.163G>A (p.D55N) alteration is located in exon 3 (coding exon 2) of the CNFN gene. This alteration results from a G to A substitution at nucleotide position 163, causing the aspartic acid (D) at amino acid position 55 to be replaced by an asparagine (N). 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

0.16

BayesDel_addAF

Benign

-0.34

BayesDel_noAF

Benign

-0.45

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.061

T;T

Eigen

Uncertain

0.32

Eigen_PC

Uncertain

0.27

FATHMM_MKL

Uncertain

0.86

LIST_S2

Benign

0.77

.;T

M_CAP

Uncertain

0.10

MetaRNN

Uncertain

0.48

T;T

MetaSVM

Benign

-0.71

MutationAssessor

Benign

0.97

L;L

PrimateAI

Pathogenic

0.86

PROVEAN

Benign

-1.8

N;.

REVEL

Uncertain

0.34

Sift

Benign

0.12

T;.

Sift4G

Uncertain

0.046

D;D

Polyphen

1.0

D;D

Vest4

0.53

MutPred

0.56

Loss of helix (P = 0.1706);Loss of helix (P = 0.1706);

MVP

0.48

MPC

0.78

ClinPred

0.95

GERP RS

4.7

Varity_R

0.29

gMVP

0.64

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