3-14145293-G-A

Variant names:

• chr3-14145293-G-A
• rs1015682387
• NM_004628.5:c.*648C>T

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BP4_Strong

The NM_004628.5(XPC):​c.*648C>T variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000588 in 697,428 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: 𝑓 0.000053 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000060 (0 hom.)
• Consequence: XPC NM_004628.5 3_prime_UTR
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.750
• Publications: 0 publications found

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]

ENSG00000268279 (HGNC:):

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

ACMG classification

Our verdict: Likely_benign. The variant received -4 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.8).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
XPC	NM_004628.5	c.*648C>T		3_prime_UTR_variant	Exon 16 of 16	ENST00000285021.12	NP_004619.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
XPC	ENST00000285021.12	c.*648C>T		3_prime_UTR_variant	Exon 16 of 16	1	NM_004628.5	ENSP00000285021.8
ENSG00000268279	ENST00000608606.1	n.236-29G>A		intron_variant	Intron 3 of 4	5		ENSP00000476275.1

Frequencies

GnomAD3 genomes AF: 0.0000527 AC: 8 AN: 151844 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000969

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000588

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000389 AC: 5 AN: 128552 AF XY: 0.0000143

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000102

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000605 AC: 33 AN: 545466 Hom.: 0 Cov.: 0 AF XY: 0.0000609 AC XY: 18 AN XY: 295370

African (AFR) AF: 0.0000645 AC: 1 AN: 15514

American (AMR) AF: 0.00 AC: 0 AN: 34212

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19906

East Asian (EAS) AF: 0.00 AC: 0 AN: 32080

South Asian (SAS) AF: 0.0000322 AC: 2 AN: 62182

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 33152

Middle Eastern (MID) AF: 0.000826 AC: 2 AN: 2422

European-Non Finnish (NFE) AF: 0.0000887 AC: 28 AN: 315672

Other (OTH) AF: 0.00 AC: 0 AN: 30326

GnomAD4 genome AF: 0.0000526 AC: 8 AN: 151962 Hom.: 0 Cov.: 32 AF XY: 0.0000673 AC XY: 5 AN XY: 74260

African (AFR) AF: 0.0000966 AC: 4 AN: 41420

American (AMR) AF: 0.00 AC: 0 AN: 15264

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5176

South Asian (SAS) AF: 0.00 AC: 0 AN: 4814

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10516

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 292

European-Non Finnish (NFE) AF: 0.0000588 AC: 4 AN: 67988

Other (OTH) AF: 0.00 AC: 0 AN: 2110

Alfa AF: 0.000304 Hom.: 0

Bravo AF: 0.0000604

Asia WGS AF: 0.000577 AC: 2 AN: 3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Xeroderma pigmentosum, group C Uncertain:1

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.80
CADD	Benign	0.96
DANN	Benign	0.49
PhyloP100		-0.75

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: rs1015682387; hg19: chr3-14186793;