11-47215017-G-A

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_000107.3(DDB2):c.-120G>A variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0181 in 1,493,168 control chromosomes in the GnomAD database, including 4,020 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.092 (2133 hom., cov: 31)
  • Exomes 𝑓: 0.0097 (1887 hom.)
• Consequence: DDB2 NM_000107.3 5_prime_UTR
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: 0.284

Genes affected

DDB2 (HGNC:2718): (damage specific DNA binding protein 2) This gene encodes a protein that is necessary for the repair of ultraviolet light-damaged DNA. This protein is the smaller subunit of a heterodimeric protein complex that participates in nucleotide excision repair, and this complex mediates the ubiquitylation of histones H3 and H4, which facilitates the cellular response to DNA damage. This subunit appears to be required for DNA binding. Mutations in this gene cause xeroderma pigmentosum complementation group E, a recessive disease that is characterized by an increased sensitivity to UV light and a high predisposition for skin cancer development, in some cases accompanied by neurological abnormalities. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2014]

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.67).
• BP6: Variant 11-47215017-G-A is Benign according to our data. Variant chr11-47215017-G-A is described in ClinVar as [Benign]. Clinvar id is 304913.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.315 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DDB2	NM_000107.3	c.-120G>A		5_prime_UTR_variant	1/10	ENST00000256996.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DDB2	ENST00000256996.9	c.-120G>A		5_prime_UTR_variant	1/10	1	NM_000107.3	P1

Frequencies

GnomAD3 genomes AF: 0.0920 AC: 13978 AN: 152014 Hom.: 2132 Cov.: 31

Gnomad AFR AF: 0.320

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0310

Gnomad ASJ AF: 0.00432

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00166

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.0570

Gnomad NFE AF: 0.00118

Gnomad OTH AF: 0.0697

GnomAD4 exome AF: 0.00974 AC: 13060 AN: 1341036 Hom.: 1887 Cov.: 20 AF XY: 0.00842 AC XY: 5664 AN XY: 673040

Gnomad4 AFR exome AF: 0.333

Gnomad4 AMR exome AF: 0.0165

Gnomad4 ASJ exome AF: 0.00365

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00119

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000542

Gnomad4 OTH exome AF: 0.0209

GnomAD4 genome AF: 0.0920 AC: 13997 AN: 152132 Hom.: 2133 Cov.: 31 AF XY: 0.0891 AC XY: 6625 AN XY: 74388

Gnomad4 AFR AF: 0.320

Gnomad4 AMR AF: 0.0310

Gnomad4 ASJ AF: 0.00432

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00145

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00118

Gnomad4 OTH AF: 0.0690

Alfa AF: 0.0181 Hom.: 113

Bravo AF: 0.104

Asia WGS AF: 0.0190 AC: 66 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Xeroderma pigmentosum, group E Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

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 and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

not provided Benign:1

Benign, criteria provided, single submitter

clinical testing

GeneDx

Feb 28, 2019

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.67
Cadd	Benign	15
Dann	Benign	0.81

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

LitVar

Other links and lift over

dbSNP: rs4647707; hg19: chr11-47236568;