14-20456290-T-A

Variant names:

• chr14-20456290-T-A
• rs3136818
• NM_001641.4:c.246+189T>A

Variant summary

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

The NM_001641.4(APEX1):​c.246+189T>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0468 in 152,262 control chromosomes in the GnomAD database, including 550 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency: Genomes: 𝑓 0.047 (550 hom., cov: 33)
• Consequence: APEX1 NM_001641.4 intron
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: 0.907

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 Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.8).
• BP6: Variant 14-20456290-T-A is Benign according to our data. Variant chr14-20456290-T-A is described in ClinVar as [Benign]. Clinvar id is 1234224.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.157 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
APEX1	NM_001641.4	c.246+189T>A		intron_variant	Intron 3 of 4	ENST00000216714.8	NP_001632.2
APEX1	NM_001244249.2	c.246+189T>A		intron_variant	Intron 3 of 4		NP_001231178.1
APEX1	NM_080648.3	c.246+189T>A		intron_variant	Intron 3 of 4		NP_542379.1
APEX1	NM_080649.3	c.246+189T>A		intron_variant	Intron 3 of 4		NP_542380.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
APEX1	ENST00000216714.8	c.246+189T>A		intron_variant	Intron 3 of 4	1	NM_001641.4	ENSP00000216714.3

Frequencies

GnomAD3 genomes AF: 0.0467 AC: 7112 AN: 152144 Hom.: 547 Cov.: 33

Gnomad AFR AF: 0.160

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0148

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000577

Gnomad SAS AF: 0.0165

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.0127

Gnomad NFE AF: 0.00137

Gnomad OTH AF: 0.0392

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.0468 AC: 7132 AN: 152262 Hom.: 550 Cov.: 33 AF XY: 0.0458 AC XY: 3410 AN XY: 74466

Gnomad4 AFR AF: 0.160

Gnomad4 AMR AF: 0.0147

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.000578

Gnomad4 SAS AF: 0.0164

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00137

Gnomad4 OTH AF: 0.0388

Alfa AF: 0.0374 Hom.: 44

Bravo AF: 0.0531

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:2

-

Breakthrough Genomics, Breakthrough Genomics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Jun 19, 2021

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.80
CADD	Benign	6.2
DANN	Benign	0.32

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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: rs3136818; hg19: chr14-20924449;