6-31116658-G-T

Variant names:

• chr6-31116658-G-T
• rs1062470
• NM_001264.5:c.957C>A

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PVS1_Strong PM2

The NM_001264.5(CDSN):​c.957C>A​(p.Tyr319*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. Y319Y) has been classified as Benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CDSN NM_001264.5 stop_gained
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.15
• Publications: 60 publications found

Genes affected

CDSN (HGNC:1802): (corneodesmosin) This gene encodes a protein found in corneodesmosomes, which localize to human epidermis and other cornified squamous epithelia. The encoded protein undergoes a series of cleavages during corneocyte maturation. This gene is highly polymorphic in human populations, and variation has been associated with skin diseases such as psoriasis, hypotrichosis and peeling skin syndrome. The gene is located in the major histocompatibility complex (MHC) class I region on chromosome 6. [provided by RefSeq, Dec 2014]

PSORS1C1 (HGNC:17202): (psoriasis susceptibility 1 candidate 1) This gene is one of several genes thought to confer susceptibility to psoriasis and systemic sclerosis, located on chromosome 6 near the major histocompatibility complex (MHC) class I region. [provided by RefSeq, Sep 2011]

ACMG classification

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. Fraction of 0.398 CDS is truncated, and there are 1 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001264.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CDSN	NM_001264.5	MANE Select	c.957C>A	p.Tyr319*	stop_gained	Exon 2 of 2	NP_001255.4
	PSORS1C1	NM_014068.3	MANE Select	c.-229+1767G>T		intron	N/A	NP_054787.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CDSN	ENST00000376288.3	TSL:1 MANE Select	c.957C>A	p.Tyr319*	stop_gained	Exon 2 of 2	ENSP00000365465.2
	PSORS1C1	ENST00000259881.10	TSL:1 MANE Select	c.-229+1767G>T		intron	N/A	ENSP00000259881.9
	PSORS1C1	ENST00000479581.5	TSL:1	n.61+1767G>T		intron	N/A

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 71

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.60	D
BayesDel_noAF	Pathogenic	0.54
CADD	Pathogenic	43
DANN	Uncertain	1.0
Eigen	Uncertain	0.60
Eigen_PC	Uncertain	0.44
FATHMM_MKL	Benign	0.72	D
PhyloP100		2.2
Vest4		0.72
GERP RS		3.2
Mutation Taster		=48/152	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs1062470; hg19: chr6-31084435;