chr20-63695226-G-T

Position:

chr20-63695226-G-T

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBA1

The NM_001283009.2(RTEL1):c.3499+5G>T variant causes a splice donor 5th base, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.122 in 1,610,464 control chromosomes in the GnomAD database, including 14,426 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.10 ( 1207 hom., cov: 32)

Exomes 𝑓: 0.12 ( 13219 hom. )

Consequence

RTEL1
NM_001283009.2 splice_donor_5th_base, intron

Scores

Splicing: ADA: 0.9398

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:8O:1

Conservation

PhyloP100: 1.33

Variant links:

Genes affected

RTEL1 (HGNC:15888): (regulator of telomere elongation helicase 1) This gene encodes a DNA helicase which functions in the stability, protection and elongation of telomeres and interacts with proteins in the shelterin complex known to protect telomeres during DNA replication. Mutations in this gene have been associated with dyskeratosis congenita and Hoyerall-Hreidarsson syndrome. Read-through transcription of this gene into the neighboring downstream gene, which encodes tumor necrosis factor receptor superfamily, member 6b, generates a non-coding transcript. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Sep 2013]

RTEL1 links:

RTEL1-TNFRSF6B (HGNC:44095): (RTEL1-TNFRSF6B readthrough (NMD candidate)) This locus represents naturally occurring read-through transcription between the neighboring RTEL1 (regulator of telomere elongation helicase 1) and TNFRSF6B (tumor necrosis factor receptor superfamily, member 6b, decoy) genes on chromosome 20. The read-through transcript is a candidate for nonsense-mediated mRNA decay (NMD), and is unlikely to produce a protein product. [provided by RefSeq, Feb 2011]

RTEL1-TNFRSF6B links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.81).

BP6

Variant 20-63695226-G-T is Benign according to our data. Variant chr20-63695226-G-T is described in ClinVar as [Benign]. Clinvar id is 403403.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr20-63695226-G-T is described in Lovd as [Benign].

BA1

GnomAd4 highest subpopulation (AMR) allele frequency at 95% confidence interval = 0.228 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RTEL1	NM_001283009.2 linkuse as main transcript	c.3499+5G>T		splice_donor_5th_base_variant, intron_variant		ENST00000360203.11	NP_001269938.1
RTEL1-TNFRSF6B	NR_037882.1 linkuse as main transcript	n.4326+5G>T		splice_donor_5th_base_variant, intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RTEL1	ENST00000360203.11 linkuse as main transcript	c.3499+5G>T		splice_donor_5th_base_variant, intron_variant		5	NM_001283009.2	ENSP00000353332	A2	Q9NZ71-6

Frequencies

GnomAD3 genomes

AF:

0.104

AC:

15817

AN:

151970

Hom.:

1202

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0282

Gnomad AMI

AF:

0.0921

Gnomad AMR

AF:

0.234

Gnomad ASJ

AF:

0.0821

Gnomad EAS

AF:

0.231

Gnomad SAS

AF:

0.107

Gnomad FIN

AF:

0.0749

Gnomad MID

AF:

0.0886

Gnomad NFE

AF:

0.116

Gnomad OTH

AF:

0.127

GnomAD3 exomes

AF:

0.149

AC:

36332

AN:

244330

Hom.:

4073

AF XY:

0.141

AC XY:

18827

AN XY:

133414

show subpopulations

Gnomad AFR exome

AF:

0.0252

Gnomad AMR exome

AF:

0.365

Gnomad ASJ exome

AF:

0.0847

Gnomad EAS exome

AF:

0.220

Gnomad SAS exome

AF:

0.109

Gnomad FIN exome

AF:

0.0814

Gnomad NFE exome

AF:

0.116

Gnomad OTH exome

AF:

0.144

GnomAD4 exome

AF:

0.124

AC:

181111

AN:

1458376

Hom.:

13219

Cov.:

AF XY:

0.122

AC XY:

88833

AN XY:

725286

show subpopulations

Gnomad4 AFR exome

AF:

0.0229

Gnomad4 AMR exome

AF:

0.350

Gnomad4 ASJ exome

AF:

0.0848

Gnomad4 EAS exome

AF:

0.230

Gnomad4 SAS exome

AF:

0.109

Gnomad4 FIN exome

AF:

0.0869

Gnomad4 NFE exome

AF:

0.118

Gnomad4 OTH exome

AF:

0.126

GnomAD4 genome

AF:

0.104

AC:

15838

AN:

152088

Hom.:

1207

Cov.:

AF XY:

0.105

AC XY:

7776

AN XY:

74330

show subpopulations

Gnomad4 AFR

AF:

0.0281

Gnomad4 AMR

AF:

0.234

Gnomad4 ASJ

AF:

0.0821

Gnomad4 EAS

AF:

0.232

Gnomad4 SAS

AF:

0.108

Gnomad4 FIN

AF:

0.0749

Gnomad4 NFE

AF:

0.116

Gnomad4 OTH

AF:

0.132

Alfa

AF:

0.125

Hom.:

632

Bravo

AF:

0.116

Asia WGS

AF:

0.176

AC:

612

AN:

3478

EpiCase

AF:

0.120

EpiControl

AF:

0.116

ClinVar

Significance: Benign

Submissions summary: Benign:8Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2Other:1

Benign, criteria provided, single submitter	clinical testing	GeneDx	Nov 12, 2018	- -
Benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
not provided, no classification provided	phenotyping only	GenomeConnect, ClinGen	-	Variant interpreted as Benign and reported on 04-27-2020 by Lab or GTR ID 500031. GenomeConnect assertions are reported exactly as they appear on the patient-provided report from the testing laboratory. GenomeConnect staff make no attempt to reinterpret the clinical significance of the variant. This variant was reported in an individual referred for clinical diagnostic genetic testing. -

not specified

Benign:2

Benign, criteria provided, single submitter	clinical testing	Unidad de Genómica Garrahan, Hospital de Pediatría Garrahan	Jan 24, 2024	This variant is classified as Benign based on local population frequency. This variant was detected in 43% of patients studied by a panel of primary immunodeficiencies. Number of patients: 41. Only high quality variants are reported. -
Benign, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Mar 29, 2016	Variant identified in a genome or exome case(s) and assessed due to predicted null impact of the variant or pathogenic assertions in the literature or databases. Disclaimer: This variant has not undergone full assessment. The following are preliminary notes: Frequency -

Dyskeratosis congenita, autosomal recessive 5

Benign:1

Benign, criteria provided, single submitter

clinical testing

Genome-Nilou Lab

Jul 10, 2021

- -

Pulmonary fibrosis and/or bone marrow failure, Telomere-related, 3

Benign:1

Benign, criteria provided, single submitter

clinical testing

Genome-Nilou Lab

Jul 10, 2021

- -

Dyskeratosis congenita, autosomal recessive 5;C4225346:Pulmonary fibrosis and/or bone marrow failure, Telomere-related, 3

Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Feb 01, 2024

- -

Dyskeratosis congenita

Benign:1

Benign, no assertion criteria provided

clinical testing

Natera, Inc.

Sep 16, 2020

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.81

CADD

Benign

DANN

Benign

0.82

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.94

dbscSNV1_RF

Benign

0.67

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over