chr17-41624217-TAGG-T

Variant names:

• chr17-41624217-TAGG-T
• rs121912478
• NM_000422.3:c.290_292delCCT

Variant summary

Our verdict is Pathogenic. The variant received 13 ACMG points: 13P and 0B. PM1 PM2 PM4_Supporting PP5_Very_Strong

The NM_000422.3(KRT17):​c.290_292delCCT​(p.Ser97del) variant causes a disruptive inframe deletion change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (★★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: KRT17 NM_000422.3 disruptive_inframe_deletion
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:3 O:1
• Conservation: PhyloP100: 9.32
• Publications: 2 publications found

Genes affected

KRT17 (HGNC:6427): (keratin 17) This gene encodes the type I intermediate filament chain keratin 17, expressed in nail bed, hair follicle, sebaceous glands, and other epidermal appendages. Mutations in this gene lead to Jackson-Lawler type pachyonychia congenita and steatocystoma multiplex. [provided by RefSeq, Aug 2008]

KRT17 Gene-Disease associations (from GenCC):

• sebocystomatosis

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Orphanet, Labcorp Genetics (formerly Invitae), Genomics England PanelApp
• pachyonychia congenita 2

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp
• pachyonychia congenita

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Pathogenic. The variant received 13 ACMG points.

• PM1: In a hotspot region, there are 11 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 1 uncertain in NM_000422.3
• PM2: Very rare variant in population databases, with high coverage
• PM4: Nonframeshift variant in NON repetitive region in NM_000422.3. Strenght limited to Supporting due to length of the change: 1aa.
• PP5: Variant 17-41624217-TAGG-T is Pathogenic according to our data. Variant chr17-41624217-TAGG-T is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 265321.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000422.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KRT17	NM_000422.3	MANE Select	c.290_292delCCT	p.Ser97del	disruptive_inframe_deletion	Exon 1 of 8	NP_000413.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KRT17	ENST00000311208.13	TSL:1 MANE Select	c.290_292delCCT	p.Ser97del	disruptive_inframe_deletion	Exon 1 of 8	ENSP00000308452.8
	KRT17	ENST00000862596.1		c.290_292delCCT	p.Ser97del	disruptive_inframe_deletion	Exon 1 of 8	ENSP00000532655.1
	KRT17	ENST00000577817.3	TSL:3	c.245_247delCCT	p.Ser82del	disruptive_inframe_deletion	Exon 1 of 4	ENSP00000467418.1

Frequencies

GnomAD3 genomes Cov.: 33

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions as Germline

Significance: Pathogenic/Likely pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
1	-	-	not provided (2)
1	-	-	Pachyonychia congenita 2 (1)
1	-	-	Steatocystoma multiplex;C1721007:Pachyonychia congenita 2 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		9.3
Mutation Taster		=37/63	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs121912478; hg19: chr17-39780469;