rs764321665

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong

The NM_004628.5(XPC):c.739C>T(p.Arg247*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000624 in 1,603,198 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000055 ( 0 hom. )

Consequence

XPC
NM_004628.5 stop_gained

Scores

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:4

Conservation

PhyloP100: 1.24

Publications

1 publications found

Variant links:

Genes affected

XPC (HGNC:12816): (XPC complex subunit, DNA damage recognition and repair factor) The protein encoded by this gene is a key component of the XPC complex, which plays an important role in the early steps of global genome nucleotide excision repair (NER). The encoded protein is important for damage sensing and DNA binding, and shows a preference for single-stranded DNA. Mutations in this gene or some other NER components can result in Xeroderma pigmentosum, a rare autosomal recessive disorder characterized by increased sensitivity to sunlight with the development of carcinomas at an early age. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Aug 2017]

XPC links:

XPC-AS1 (HGNC:55014): (XPC antisense RNA 1)

XPC-AS1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

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 3-14165468-G-A is Pathogenic according to our data. Variant chr3-14165468-G-A is described in ClinVar as Pathogenic. ClinVar VariationId is 556301.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004628.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
XPC	NM_004628.5	MANE Select	c.739C>T	p.Arg247*	stop_gained	Exon 6 of 16	NP_004619.3
XPC	NM_001354727.2		c.739C>T	p.Arg247*	stop_gained	Exon 6 of 16	NP_001341656.1
XPC	NM_001354729.2		c.721C>T	p.Arg241*	stop_gained	Exon 6 of 16	NP_001341658.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
XPC	ENST00000285021.12	TSL:1 MANE Select	c.739C>T	p.Arg247*	stop_gained	Exon 6 of 16	ENSP00000285021.8
XPC	ENST00000476581.6	TSL:1	n.*192C>T		non_coding_transcript_exon	Exon 5 of 15	ENSP00000424548.1
XPC	ENST00000476581.6	TSL:1	n.*192C>T		3_prime_UTR	Exon 5 of 15	ENSP00000424548.1

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152162

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000551

AC:

AN:

1451036

Hom.:

Cov.:

AF XY:

0.00000555

AC XY:

AN XY:

720636

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33328

American (AMR)

AF:

0.0000232

AC:

AN:

43034

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25890

East Asian (EAS)

AF:

0.0000508

AC:

AN:

39406

South Asian (SAS)

AF:

0.00

AC:

AN:

84052

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52806

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5692

European-Non Finnish (NFE)

AF:

0.00000361

AC:

AN:

1106778

Other (OTH)

AF:

0.0000167

AC:

AN:

60050

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.481

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<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:

0.0000131

AC:

AN:

152162

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74336

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41434

American (AMR)

AF:

0.00

AC:

AN:

15286

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.000193

AC:

AN:

5194

South Asian (SAS)

AF:

0.00

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10606

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

68026

Other (OTH)

AF:

0.00

AC:

AN:

2094

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ExAC

AF:

0.00000827

AC:

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Xeroderma pigmentosum, group C

Pathogenic:3

Feb 05, 2018

Counsyl

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:clinical testing

This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com.

Mar 14, 2024

Genomic Medicine Center of Excellence, King Faisal Specialist Hospital and Research Centre

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Oct 08, 2022

Baylor Genetics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

not provided

Pathogenic:1

Dec 13, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change creates a premature translational stop signal (p.Arg247*) in the XPC gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in XPC are known to be pathogenic (PMID: 23173980, 25256075). This variant is present in population databases (rs764321665, gnomAD 0.0008%). This premature translational stop signal has been observed in individual(s) with xeroderma pigmentosum (PMID: 23173980). This variant is also known as c.843C>T. ClinVar contains an entry for this variant (Variation ID: 556301). For these reasons, this variant has been classified as Pathogenic.

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.63

BayesDel_noAF

Pathogenic

0.26

CADD

Pathogenic

(source)

DANN

Uncertain

0.99

Eigen

Benign

0.062

Eigen_PC

Benign

-0.29

FATHMM_MKL

Benign

0.13

PhyloP100

1.2

Vest4

0.95

GERP RS

1.2

Mutation Taster

=4/196

disease causing (ClinVar)

(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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over