NM_000380.4:c.428_429delAG

Variant names:

• chr9-97687221-CCT-C
• rs1554701540
• NM_000380.4:c.428_429delAG

Variant summary

Our verdict is Pathogenic. The variant received 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The NM_000380.4(XPA):​c.428_429delAG​(p.Glu143GlyfsTer11) variant causes a frameshift 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 (★★). Synonymous variant affecting the same amino acid position (i.e. E143E) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: XPA NM_000380.4 frameshift
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:5
• Conservation: PhyloP100: 7.63
• Publications: 0 publications found

Genes affected

XPA (HGNC:12814): (XPA, DNA damage recognition and repair factor) This gene encodes a zinc finger protein plays a central role in nucleotide excision repair (NER), a specialized type of DNA repair. NER is responsible for repair of UV radiation-induced photoproducts and DNA adducts induced by chemical carcinogens and chemotherapeutic drugs. The encoded protein interacts with DNA and several NER proteins, acting as a scaffold to assemble the NER incision complex at sites of DNA damage. Mutations in this gene cause Xeroderma pigmentosum complementation group A (XP-A), an autosomal recessive skin disorder featuring hypersensitivity to sunlight and increased risk for skin cancer. [provided by RefSeq, Aug 2017]

XPA Gene-Disease associations (from GenCC):

• xeroderma pigmentosum group A

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Myriad Women’s Health, ClinGen, Genomics England PanelApp, G2P, Labcorp Genetics (formerly Invitae)
• xeroderma pigmentosum

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Pathogenic. The variant received 18 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
• PP5: Variant 9-97687221-CCT-C is Pathogenic according to our data. Variant chr9-97687221-CCT-C is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 555051.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000380.4. 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
	XPA	NM_000380.4	MANE Select	c.428_429delAG	p.Glu143GlyfsTer11	frameshift	Exon 4 of 6	NP_000371.1	P23025
	XPA	NM_001354975.2		c.302_303delAG	p.Glu101GlyfsTer11	frameshift	Exon 4 of 6	NP_001341904.1
	XPA	NR_027302.2		n.476_477delAG		non_coding_transcript_exon	Exon 4 of 7

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	XPA	ENST00000375128.5	TSL:1 MANE Select	c.428_429delAG	p.Glu143GlyfsTer11	frameshift	Exon 4 of 6	ENSP00000364270.5	P23025
	XPA	ENST00000905837.1		c.289-2183_289-2182delAG		intron	N/A	ENSP00000575896.1
	XPA	ENST00000905836.1		c.283+6426_283+6427delAG		intron	N/A	ENSP00000575895.1

Frequencies

GnomAD3 genomes Cov.: 32

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

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Pathogenic/Likely pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
3	-	-	Xeroderma pigmentosum group A (3)
1	-	-	not provided (1)
1	-	-	Xeroderma pigmentosum (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		7.6
Mutation Taster		=1/199	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.47		Details are displayed if max score is > 0.2
DS_AL_spliceai		0.47		Position offset: 40

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

Other links and lift over

dbSNP: rs1554701540; hg19: chr9-100449503;