NM_000380.4:c.766A>G

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_000380.4(XPA):c.766A>G(p.Met256Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00154 in 1,614,008 control chromosomes in the GnomAD database, including 33 homozygotes. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0083 ( 16 hom., cov: 32)

Exomes 𝑓: 0.00083 ( 17 hom. )

Consequence

XPA
NM_000380.4 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:6O:1

Conservation

PhyloP100: 2.64

Publications

8 publications found

Variant links:

COSMIC-nc: COSV104692327

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

XPA links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0063699484).

BP6

Variant 9-97675495-T-C is Benign according to our data. Variant chr9-97675495-T-C is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 135460.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.0083 (1263/152256) while in subpopulation AFR AF = 0.0291 (1211/41548). AF 95% confidence interval is 0.0278. There are 16 homozygotes in GnomAd4. There are 598 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 16 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
XPA	NM_000380.4 link	c.766A>G	p.Met256Val	missense_variant	Exon 6 of 6	ENST00000375128.5	NP_000371.1	P23025

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
XPA	ENST00000375128.5 link	c.766A>G	p.Met256Val	missense_variant	Exon 6 of 6	1	NM_000380.4	ENSP00000364270.5	P23025
XPA	ENST00000462523.5 link	n.*202A>G		non_coding_transcript_exon_variant	Exon 7 of 7	5		ENSP00000433006.1	F2Z2T2
XPA	ENST00000485042.1 link	n.278A>G		non_coding_transcript_exon_variant	Exon 2 of 2	3
XPA	ENST00000462523.5 link	n.*202A>G		3_prime_UTR_variant	Exon 7 of 7	5		ENSP00000433006.1	F2Z2T2

Frequencies

GnomAD3 genomes

AF:

0.00830

AC:

1263

AN:

152138

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0292

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00216

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.00621

GnomAD2 exomes

AF:

0.00217

AC:

546

AN:

251270

AF XY:

0.00154

show subpopulations

Gnomad AFR exome

AF:

0.0298

Gnomad AMR exome

AF:

0.00142

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000264

Gnomad OTH exome

AF:

0.00131

GnomAD4 exome

AF:

0.000833

AC:

1218

AN:

1461752

Hom.:

Cov.:

AF XY:

0.000730

AC XY:

531

AN XY:

727168

show subpopulations

African (AFR)

AF:

0.0309

AC:

1033

AN:

33474

American (AMR)

AF:

0.00161

AC:

AN:

44704

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26132

East Asian (EAS)

AF:

0.00

AC:

AN:

39684

South Asian (SAS)

AF:

0.0000464

AC:

AN:

86254

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53410

Middle Eastern (MID)

AF:

0.000693

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000135

AC:

AN:

1111942

Other (OTH)

AF:

0.00149

AC:

AN:

60384

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.478

Heterozygous variant carriers

134

202

269

336

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

108

144

180

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00830

AC:

1263

AN:

152256

Hom.:

Cov.:

AF XY:

0.00803

AC XY:

598

AN XY:

74462

show subpopulations

African (AFR)

AF:

0.0291

AC:

1211

AN:

41548

American (AMR)

AF:

0.00216

AC:

AN:

15296

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3466

East Asian (EAS)

AF:

0.00

AC:

AN:

5186

South Asian (SAS)

AF:

0.000208

AC:

AN:

4818

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10616

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000735

AC:

AN:

68006

Other (OTH)

AF:

0.00615

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.501

Heterozygous variant carriers

133

200

266

333

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00336

Hom.:

Bravo

AF:

0.00929

ESP6500AA

AF:

0.0275

AC:

121

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.00282

AC:

342

Asia WGS

AF:

0.00202

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.0000593

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:6Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Xeroderma pigmentosum group A

Benign:3

Apr 23, 2022

Fulgent Genetics, Fulgent Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Apr 28, 2017

Illumina Laboratory Services, Illumina

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). Publications were found based on this search. The evidence from the literature, in combination with allele frequency data from public databases where available, was sufficient to determine this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. -

Jul 07, 2023

KCCC/NGS Laboratory, Kuwait Cancer Control Center

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Benign:3

Jan 23, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Nov 06, 2024

GeneDx

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

See Variant Classification Assertion Criteria. -

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

not specified

Other:1

Sep 19, 2013

ITMI

Significance:not provided

Review Status:no classification provided

Collection Method:reference population

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.067

BayesDel_addAF

Benign

-0.53

BayesDel_noAF

Benign

-0.51

CADD

Benign

(source)

DANN

Benign

0.77

DEOGEN2

Benign

0.098

Eigen

Benign

-0.40

Eigen_PC

Benign

-0.22

FATHMM_MKL

Uncertain

0.82

LIST_S2

Benign

0.68

MetaRNN

Benign

0.0064

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.73

PhyloP100

2.6

PrimateAI

Benign

0.27

PROVEAN

Benign

-0.12

REVEL

Benign

0.065

Sift

Benign

0.53

Sift4G

Benign

0.42

Polyphen

0.013

Vest4

0.044

MVP

0.56

MPC

0.27

ClinPred

0.014

GERP RS

3.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.072

gMVP

0.24

Mutation Taster

=96/4

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over