14-20455381-A-G

Position:

• chr14-20455381-A-G

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_001641.4(APEX1):​c.-82A>G variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00111 in 567,744 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 0.00099 (0 hom., cov: 33)
  • Exomes 𝑓: 0.0012 (0 hom.)
• Consequence: APEX1 NM_001641.4 5_prime_UTR
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.594

Genes affected

APEX1 (HGNC:587): (apurinic/apyrimidinic endodeoxyribonuclease 1) The APEX gene encodes the major AP endonuclease in human cells. It encodes the APEX endonuclease, a DNA repair enzyme with apurinic/apyrimidinic (AP) activity. Such AP activity sites occur frequently in DNA molecules by spontaneous hydrolysis, by DNA damaging agents or by DNA glycosylases that remove specific abnormal bases. The AP sites are the most frequent pre-mutagenic lesions that can prevent normal DNA replication. Splice variants have been found for this gene; all encode the same protein. Disruptions in the biological functions related to APEX are associated with many various malignancies and neurodegenerative diseases.[provided by RefSeq, Dec 2019]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.79).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
APEX1	NM_001641.4	c.-82A>G		5_prime_UTR_variant	1/5	ENST00000216714.8
APEX1	NM_001244249.2	c.-77A>G		5_prime_UTR_variant	1/5
APEX1	NM_080648.3	c.-69+53A>G		intron_variant
APEX1	NM_080649.3	c.-69+43A>G		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
APEX1	ENST00000216714.8	c.-82A>G		5_prime_UTR_variant	1/5	1	NM_001641.4	P1

Frequencies

GnomAD3 genomes AF: 0.000992 AC: 151 AN: 152144 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.0000965

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000655

Gnomad ASJ AF: 0.00202

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00245

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00165

Gnomad OTH AF: 0.000478

GnomAD4 exome AF: 0.00116 AC: 482 AN: 415482 Hom.: 0 Cov.: 5 AF XY: 0.000981 AC XY: 215 AN XY: 219220

Gnomad4 AFR exome AF: 0.000170

Gnomad4 AMR exome AF: 0.0000582

Gnomad4 ASJ exome AF: 0.00144

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00307

Gnomad4 NFE exome AF: 0.00142

Gnomad4 OTH exome AF: 0.00106

GnomAD4 genome AF: 0.000992 AC: 151 AN: 152262 Hom.: 0 Cov.: 33 AF XY: 0.00101 AC XY: 75 AN XY: 74436

Gnomad4 AFR AF: 0.0000963

Gnomad4 AMR AF: 0.0000654

Gnomad4 ASJ AF: 0.00202

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00245

Gnomad4 NFE AF: 0.00165

Gnomad4 OTH AF: 0.000473

Alfa AF: 0.00228 Hom.: 0

Bravo AF: 0.000691

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.79
CADD	Benign	8.8
DANN	Benign	0.64
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.17		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: rs2307490; hg19: chr14-20923540;