Genetic Variant XPC:p.Phe935Leu (chr3-14145961-A-G) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_004628.5(XPC):c.2803T>C(p.Phe935Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,454,952 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 28)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

XPC
NM_004628.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.26

Publications

0 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:

ENSG00000268279 (HGNC:):

ENSG00000268279 links:

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

XPC-AS1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
XPC	NM_004628.5 link	c.2803T>C	p.Phe935Leu	missense_variant	Exon 16 of 16	ENST00000285021.12	NP_004619.3	Q01831-1X5DRB1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
XPC	ENST00000285021.12 link	c.2803T>C	p.Phe935Leu	missense_variant	Exon 16 of 16	1	NM_004628.5	ENSP00000285021.8		Q01831-1
ENSG00000268279	ENST00000608606.1 link	n.*198+278A>G		intron_variant	Intron 4 of 4	5		ENSP00000476275.1		V9GY05

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1454952

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

722440

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33228

American (AMR)

AF:

0.00

AC:

AN:

44430

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26028

East Asian (EAS)

AF:

0.00

AC:

AN:

39504

South Asian (SAS)

AF:

0.00

AC:

AN:

86038

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53116

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5700

European-Non Finnish (NFE)

AF:

9.03e-7

AC:

AN:

1106886

Other (OTH)

AF:

0.0000167

AC:

AN:

60022

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Apr 07, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.2803T>C (p.F935L) alteration is located in exon 16 (coding exon 16) of the XPC gene. This alteration results from a T to C substitution at nucleotide position 2803, causing the phenylalanine (F) at amino acid position 935 to be replaced by a leucine (L). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.96

BayesDel_addAF

Uncertain

0.058

BayesDel_noAF

Benign

-0.15

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.24

Eigen

Pathogenic

0.76

Eigen_PC

Pathogenic

0.73

FATHMM_MKL

Uncertain

0.97

LIST_S2

Benign

0.83

M_CAP

Uncertain

0.12

MetaRNN

Uncertain

0.64

MetaSVM

Benign

-0.32

MutationAssessor

Uncertain

2.6

PhyloP100

7.3

PrimateAI

Uncertain

0.64

PROVEAN

Uncertain

-2.7

REVEL

Benign

0.24

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0

Polyphen

1.0

Vest4

0.65

MutPred

0.27

Gain of glycosylation at S932 (P = 0.021);

MVP

0.57

MPC

0.61

ClinPred

0.99

GERP RS

5.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.74

gMVP

0.27

Mutation Taster

=52/48

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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3-14145961-A-G

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over